Smart Card Reader 8-Bit Flash MCU HT66F4360/HT66F4370 Revision: V1.10 Date: ��������������� August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Table of Contents Features................................................................................................................. 7 CPU Features...............................................................................................................................7 Peripheral Features.......................................................................................................................8 General Description.............................................................................................. 9 Selection Table...................................................................................................... 9 Block Diagram..................................................................................................... 10 Pin Assignment................................................................................................... 10 Pin Descriptions................................................................................................. 11 Absolute Maximum Ratings............................................................................... 15 D.C. Characteristics............................................................................................ 15 A.C. Characteristics............................................................................................ 17 LVD/LVR Electrical Characteristics................................................................... 18 A/D Converter Characteristics........................................................................... 19 Comparator Electrical Characteristics............................................................. 20 DC/DC Converter & LDO Electrical Characteristics........................................ 21 ISO7816-3 Interface Electrical Characteristics................................................ 22 LXT Oscillator Electrical Characteristics......................................................... 23 Power-on Reset Characteristics........................................................................ 23 System Architecture........................................................................................... 24 Clocking and Pipelining...............................................................................................................24 Program Counter.........................................................................................................................25 Stack...........................................................................................................................................25 Arithmetic and Logic Unit – ALU.................................................................................................26 Flash Program Memory...................................................................................... 27 Structure......................................................................................................................................27 Special Vectors...........................................................................................................................27 Look-up Table..............................................................................................................................28 Table Program Example..............................................................................................................28 In Circuit Programming – ICP.....................................................................................................29 On-Chip Debug Support – OCDS...............................................................................................30 In System Programming – ISP....................................................................................................30 In Application Programming – IAP..............................................................................................36 Data Memory....................................................................................................... 41 Structure......................................................................................................................................41 Data Memory Addressing............................................................................................................42 General Purpose Data Memory..................................................................................................42 Special Purpose Data Memory...................................................................................................43 Rev. 1.10 2 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Special Function Register Description............................................................. 44 Indirect Addressing Registers – IAR0, IAR1, IAR2.....................................................................44 Memory Pointers – MP0, MP1H/MP1L, MP2H/MP2L.................................................................44 Program Memory Bank Pointer – PBP........................................................................................45 Accumulator – ACC.....................................................................................................................46 Program Counter Low Register – PCL........................................................................................46 Look-up Table Registers – TBLP, TBHP, TBLH...........................................................................46 Status Register – STATUS..........................................................................................................47 Oscillator............................................................................................................. 49 Oscillator Overview.....................................................................................................................49 System Clock Configurations......................................................................................................49 External Crystal/Ceramic Oscillator – HXT.................................................................................50 Internal PLL Frequency Generator..............................................................................................51 Internal High Speed RC Oscillator – HIRC.................................................................................53 External 32.768kHz Crystal Oscillator – LXT..............................................................................53 Internal 32kHz Oscillator – LIRC.................................................................................................53 Operating Modes and System Clocks.............................................................. 54 System Clocks............................................................................................................................54 System Operation Modes............................................................................................................55 Control Registers........................................................................................................................56 Operating Mode Switching..........................................................................................................59 Standby Current Considerations.................................................................................................63 Wake-up......................................................................................................................................63 Watchdog Timer.................................................................................................. 64 Watchdog Timer Clock Source....................................................................................................64 Watchdog Timer Control Register...............................................................................................64 Watchdog Timer Operation.........................................................................................................65 Reset and Initialisation....................................................................................... 66 Reset Functions..........................................................................................................................66 Reset Initial Conditions...............................................................................................................71 Input/Output Ports.............................................................................................. 76 Pull-high Resistors......................................................................................................................76 Port A Wake-up...........................................................................................................................77 I/O Port Control Registers...........................................................................................................77 Pin-shared Functions..................................................................................................................78 I/O Pin Structures........................................................................................................................83 Programming Considerations......................................................................................................84 Rev. 1.10 3 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Timer Modules – TM........................................................................................... 84 Introduction.................................................................................................................................84 TM Operation..............................................................................................................................85 TM Clock Source.........................................................................................................................85 TM Interrupts...............................................................................................................................85 TM External Pins.........................................................................................................................85 TM Input/Output Pin Selection....................................................................................................86 Programming Considerations......................................................................................................87 Compact Type TM – CTM................................................................................... 88 Compact TM Operation...............................................................................................................88 Compact Type TM Register Description.....................................................................................89 Compact Type TM Operation Modes..........................................................................................93 Standard Type TM – STM................................................................................... 99 Standard TM Operation...............................................................................................................99 Standard Type TM Register Description...................................................................................100 Standard Type TM Operation Modes........................................................................................104 Periodic Type TM – PTM................................................................................... 114 Periodic TM Operation.............................................................................................................. 114 Periodic Type TM Register Description..................................................................................... 115 Periodic Type TM Operation Modes.......................................................................................... 119 Analog to Digital Converter............................................................................. 128 A/D Overview............................................................................................................................128 Registers Descriptions..............................................................................................................129 A/D Operation...........................................................................................................................132 A/D Reference Voltage..............................................................................................................133 A/D Converter Input Signals......................................................................................................133 Conversion Rate and Timing Diagram......................................................................................133 Summary of A/D Conversion Steps...........................................................................................134 Programming Considerations....................................................................................................135 A/D Transfer Function...............................................................................................................135 A/D Programming Examples.....................................................................................................136 Comparators .................................................................................................... 137 Comparator Operation..............................................................................................................137 Comparator Registers...............................................................................................................138 Offset Calibration Procedure.....................................................................................................139 Serial Peripheral Interface – SPI...................................................................... 140 SPI Interface Operation.............................................................................................................140 SPI Registers............................................................................................................................141 SPI Communication..................................................................................................................144 SPI Bus Enable/Disable............................................................................................................146 SPI Operation............................................................................................................................146 Error Detection..........................................................................................................................147 Rev. 1.10 4 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Inter-Integrated Circuit – I2C............................................................................ 148 I2C interface Operation..............................................................................................................148 I2C Register...............................................................................................................................149 I2C Bus Communication............................................................................................................152 I2C Time-out Control..................................................................................................................155 UART Interface.................................................................................................. 157 UART External Pin....................................................................................................................158 UART Data Transfer Scheme...................................................................................................158 UART Status and Control Registers.........................................................................................158 Baud Rate Generator................................................................................................................164 UART Setup and Control..........................................................................................................165 UART Transmitter.....................................................................................................................166 UART Receiver.........................................................................................................................168 Managing Receiver Errors........................................................................................................169 UART Interrupt Structure..........................................................................................................170 UART Power Down and Wake-up.............................................................................................172 USB Interface.................................................................................................... 172 Power Plane..............................................................................................................................172 USB Interface Operation...........................................................................................................173 USB Interface Registers............................................................................................................174 USB Suspend Mode and Wake-up...........................................................................................185 USB Interrupts...........................................................................................................................186 DC/DC Converter and LDO.............................................................................. 187 Smart Card Interface........................................................................................ 188 Interface Pins............................................................................................................................188 Card Detection..........................................................................................................................189 Internal Time Counter – ETU, GTC, WTC.................................................................................189 Smart Card UART Mode...........................................................................................................192 Power Control...........................................................................................................................193 Smart Card Interrupt Structure..................................................................................................194 Programming Considerations....................................................................................................195 Smart Card Interface Status and Control Registers..................................................................195 Low Voltage Detector – LVD............................................................................ 206 LVD Register.............................................................................................................................206 LVD Operation...........................................................................................................................207 Rev. 1.10 5 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Interrupts........................................................................................................... 208 Interrupt Registers.....................................................................................................................208 Interrupt Operation....................................................................................................................216 Smart Card Operation Interrupt.................................................................................................218 USB Interrupt............................................................................................................................218 External Interrupt.......................................................................................................................218 UART Transfer Interrupt............................................................................................................219 Smart Card Insertion/Removal Interrupt...................................................................................219 Time Base Interrupt...................................................................................................................219 SPI Interrupt..............................................................................................................................221 Multi-function Interrupt..............................................................................................................221 TM Interrupt...............................................................................................................................221 I2C Interrupt...............................................................................................................................222 LVD Interrupt.............................................................................................................................222 Comparator Interrupt.................................................................................................................222 A/D Converter Interrupt.............................................................................................................222 Interrupt Wake-up Function.......................................................................................................223 Programming Considerations....................................................................................................223 Configuration Options...................................................................................... 224 Application Circuits.......................................................................................... 224 Instruction Set................................................................................................... 225 Introduction...............................................................................................................................225 Instruction Timing......................................................................................................................225 Moving and Transferring Data...................................................................................................225 Arithmetic Operations................................................................................................................225 Logical and Rotate Operation...................................................................................................226 Branches and Control Transfer.................................................................................................226 Bit Operations...........................................................................................................................226 Table Read Operations.............................................................................................................226 Other Operations.......................................................................................................................226 Instruction Set Summary................................................................................. 227 Table Conventions.....................................................................................................................227 Extended Instruction Set...........................................................................................................229 Instruction Definition........................................................................................ 231 Extended Instruction Definition.................................................................................................240 Package Information........................................................................................ 247 48-pin LQFP (7mm × 7mm) Outline Dimensions......................................................................248 64-pin LQFP (7mm × 7mm) Outline Dimensions......................................................................249 Rev. 1.10 6 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Features CPU Features • Operating voltage ♦♦ VDD (MCU) ––fSYS= 6MHz: 2.2V~5.5V ––fSYS= 12MHz: 2.7V~5.5V ♦♦ VDD (USB Mode) ––fSYS= 6MHz/12MHz: 2.7V~5.5V ––fSYS= 16MHz: 4.5V~5.5V • Up to 0.25μs instruction cycle with 16MHz system clock at VDD=5V • Power down and wake-up functions to reduce power consumption • Oscillator Types ♦♦ External High Speed Crystal – HXT ♦♦ Internal High Speed RC – HIRC ♦♦ External 32.768kHz Crystal – LXT ♦♦ Internal 32kHz RC – LIRC • Fully integrated internal 12 MHz oscillator with 0.25% accuracy for all USB modes which requires no external components • Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP • All instructions executed in one to three instruction cycles • Table read instructions • 115 powerful instructions • 12-level subroutine nesting • Bit manipulation instruction Rev. 1.10 7 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Peripheral Features • Program Memory: Up to 32K×16 • Data Memory: 3072×8 • Watchdog Timer function • Up to 36 bidirectional I/O lines • Dual external interrupt lines shared with I/O pins • Multiple Timer Modules for time measure, input capture, compare match output, PWM output function or single pulse output function ♦♦ Dual Compact type 10-bit Timer Modules – CTM0 & CTM1 ♦♦ Single Periodic type 10-bit Timer Module – PTM ♦♦ Single Standard type 16-bit Timer Module – STM • Smart Card interface compatible with and certifiable to the ISO 7816-3 Standards • 1.8V, 3V, 5V smart card supply • USB interface ♦♦ USB 2.0 Full Speed compatible ♦♦ 8 endpoints supported including endpoint 0 ♦♦ All endpoints except endpoint 0 can support interrupt and bulk transfer ♦♦ All emdpoints except endpoint 0 can be configured as 8, 16, 32, 64 bytes FIFO size ♦♦ Endpoint 0 supports control transfer ♦♦ Endpoint 0 FIFO size: 8 bytes ♦♦ Integrated an internal 1.5kΩ pull-high resistor on UDP pin ♦♦ Support 3.3V LDO • Dual Serial SPI Interfaces – SPI0 & SPI1 • Single I2C interface • Dual Fully-duplex Universal Asynchronous Receiver and Transmitter Interface – UART0 & UART1 • Dual comparator functions • Dual Time-Base functions for generation of fixed time interrupt signalsS • 8-channel 12-bit resolution A/D converter • In Application Programming function – IAP • In System Programming function – ISP • Low voltage reset function • Low voltage detect function • Flash program memory can be re-programmed up to 100,000 times • Flash program memory data retention > 10 years • Package types: 48-pin LQFP, 64-pin LQFP Rev. 1.10 8 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU General Description The devices are Flash Memory A/D type 8-bit high performance RISC architecture microcontrollers with fully integrated Smart Card interface function, designed for applications that communicate with various types of Smart Card. Offering users the convenience of Flash Memory multi-programming features, these devices also include a wide range of functions and features. In addition to the flash program memory, other memory includes an area of RAM Data Memory. Analog features include a multi-channel 12-bit A/D converter, dual comparator functions, a DC/ DC converter and an LDO. Multiple and extremely flexible Timer Modules provide timing, pulse generation and PWM generation functions. Easy communication with the outside world is provided using the internal fully integrated SPI, I2C, UART and USB interface functions, four popular interfaces which provide designers with a means of easy communication with external peripheral hardware. The inclusion of flexible I/O programming features, Time Base functions together with many other features further enhance device functionality and flexibility for wide range of application possibilities. Protective features such as an internal Watchdog Timer, Low Voltage Reset and Low Voltage Detector coupled with excellent noise immunity and ESD protection ensure that reliable operation is maintained in hostile electrical environments. These devices also include fully integrated low and high speed oscillators which are flexibly used for different applications. The ability to operate and switch dynamically between a range of operating modes using different clock sources gives users the ability to optimise microcontroller operation and minimise power consumption. The unique Holtek TinyPower technology also offers the advantages of extremely low current consumption characteristics, an extremely important consideration in the present trend for low power battery powered applications. The usual Holtek MCU features such as power down and wake-up functions, oscillator options, programmable frequency divider, etc., combine to ensure user applications require a minimum of external components. Selection Table Most features are common to all devices. The only feature distinguishing them is the Program Memory capacity. The following table summarises the main features of each device. Part No. Program Memory Data Memory I/O External Interrupt A/D Timer Module Time Base HT66F4360 16k × 16 3072 × 8 36 2 12-bit × 8 10-bit CTM × 2 10-bit PTM × 1 16-bit STM × 1 2 HT66F4370 32k × 16 3072 × 8 36 2 12-bit × 8 10-bit CTM × 2 10-bit PTM × 1 16-bit STM × 1 2 Part No. SPI I2C UART USB Smart Card Stacks Package HT66F4360 2 √ √ √ √ 12 48/64LQFP HT66F4370 2 √ √ √ √ 12 48/64LQFP Note: As devices exist in more than one package format, the table reflects the situation for the package with the most pins. Rev. 1.10 9 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Block Diagram Watchdo� Timer Flash Pro�rammin� Circ�itry Flash Pro�ram Memory Internal HIRC/LIRC Oscillators Low Volta�e Detect I�P/ISP Reset Circ�it 8-bit RISC MCU Core Low Volta�e Reset R�M Data Memory Time Base Interr�pt Controller External HXT/LXT Oscillators 1�-bit �/D Converter Comparators I/O Timer Mod�les SPI/I�C/ U�RT USB �.0 ISO 7816-3 Interface LDO DC/DC Converter Pin Assignment NC NC PB4/PTPI/INT1/AN4 PB5/STPI/TX1/AN5 PB6/INT0/RX1/AN6 PB7/VREF/AN7 PE0/VDDIO PA7/SCS0/C1− PA6/SCK0/C1+ PA5/SDI0/C1X PA4/SDO0/C0− PA3/TX0/C0+ PA2/OCDSCK PA1/RX0/C0X NC NC NC NC PA0/OCDSDA UDN/GPIO0 UDP/GPIO1 V33O PE1/UBUS/VDD HVDD VSS PE7/RES PE3/OSC2 PE2/OSC1 PC7/STCK/SDA PC6/PTCK/SCL NC NC 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 1 48 2 47 3 46 4 45 44 5 6 43 42 7 HT66F4360/HT66V4360 8 41 HT66F4370/HT66V4370 40 9 64 LQFP-A 10 39 38 11 12 37 36 13 35 14 34 15 33 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 PB3/SCS1/AN3 PB2/SCK1/AN2 PB1/SDI1/AN1 PB0/SDO1/AN0 AVSS XT1 XT2 AVDD PF0/CTP0 PF1/CTP1 PF2/PTP PF3/STP SELF CVSS VO CRDVCC CRST CC4 CCLK CC8 CIO CDET PF4 PF5 PF6 PF7 PC0/CTP0B PC1/CTP1B PC2/PTPB PC3/STPB PC4/CTCK0 PC5/CTCK1 Rev. 1.10 10 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU PB4/PTPI/INT1/AN4 PB5/STPI/TX1/AN5 PB6/INT0/RX1/AN6 PB7/VREF/AN7 PE0/VDDIO PA7/SCS0/C1− PA6/SCK0/C1+ PA5/SDI0/C1X PA4/SDO0/C0− PA3/TX0/C0+ PA2/OCDSCK PA1/RX0/C0X PA0/OCDSDA UDN/GPIO0 UDP/GPIO1 V33O PE1/UBUS/VDD HVDD VSS PE7/RES PE3/OSC2 PE2/OSC1 PC7/STCK/SDA PC6/PTCK/SCL 48 47 46 45 44 43 42 41 40 39 38 37 36 1 35 2 34 3 4 33 5 32 6 HT66F4360/HT66V4360 31 7 HT66F4370/HT66V4370 30 29 8 48 LQFP-A 28 9 27 10 26 11 25 12 13 14 1516 17 18 19 20 21 22 23 24 PB3/SCS1/AN3 PB2/SCK1/AN2 PB1/SDI1/AN1 PB0/SDO1/AN0 AVSS XT1 XT2 AVDD SELF CVSS VO CRDVCC CRST CC4 CCLK CC8 CIO CDET PC0/CTP0B PC1/CTP1B PC2/PTPB PC3/STPB PC4/CTCK0 PC5/CTCK1 Note: The OCDSDA and OCDSCK pins are the OCDS dedicated pins and only available for the HT66V43x0 device which is the OCDS EV chip for the HT66F43x0 device respectively. Pin Descriptions With the exception of the power pins and some relevant transformer control pins, all pins on these devices can be referenced by their Port name, e.g. PA.0, PA.1 etc, which refer to the digital I/O function of the pins. However these Port pins are also shared with other function such as the Analog to Digital Converter, Timer Module pins etc. The function of each pin is listed in the following table, however the details behind how each pin is configured is contained in other sections of the datasheet. Pad Name PA0/OCDSDA PA1/RX0/C0X PA2/OCDSCK PA3/TX0/C0+ Rev. 1.10 Function OPT I/T O/T PA0 PAWU PAPU PAS0 Description ST CMOS OCDSDA — ST CMOS OCDS Data/Address pin, for EV chip only. PA1 PAWU PAPU PAS0 ST CMOS RX0 PAS0 ST C0X PAS0 — CMOS Comparator 0 output PA2 PAWU PAPU PAS0 ST CMOS OCDSCK — ST CMOS OCDS Clock pin, for EV chip only. PA3 PAWU PAPU PAS0 ST CMOS TX0 PAS0 — CMOS UART0 TX serial data output C0+ PAS0 AN — General purpose I/O. Register enabled pull-up and wake-up. General purpose I/O. Register enabled pull-up and wake-up. UART0 RX serial data input — General purpose I/O. Register enabled pull-up and wake-up. General purpose I/O. Register enabled pull-up and wake-up. Comparator 0 positive input 11 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Pad Name PA4/SDO0/C0− PA5/SDI0/C1X PA6/SCK0/C1+ PA7/SCS0/C1− PB0/SDO1/AN0 PB1/SDI1/AN1 PB2/SCK1/AN2 PB3/SCS1/AN3 Function OPT I/T O/T PA4 PAWU PAPU PAS1 ST CMOS SDO0 PAS1 — CMOS SPI0 data output C0− PAS1 AN — PA5 PAWU PAPU PAS1 ST CMOS SDI0 PAS1 ST C1X PAS1 — CMOS Comparator 1 output PA6 PAWU PAPU PAS1 ST CMOS SCK0 PAS1 ST CMOS SPI0 serial clock C1+ PAS1 AN — PA7 PAWU PAPU PAS1 ST CMOS SCS0 PAS1 ST CMOS SPI0 slave select C1− PAS1 AN PB0 PBPU PBS0 ST CMOS General purpose I/O. Register enabled pull-up. SDO1 PBS0 — CMOS SPI1 data output AN0 PBS0 AN PB1 PBPU PBS0 ST SDI1 PBS0 ST — SPI1 data input AN1 PBS0 AN — A/D Converter analog input PB2 PBPU PBS0 ST CMOS General purpose I/O. Register enabled pull-up. CMOS SPI1 serial clock Rev. 1.10 General purpose I/O. Register enabled pull-up and wake-up. Comparator 0 negative input — General purpose I/O. Register enabled pull-up and wake-up. SPI0 data input General purpose I/O. Register enabled pull-up and wake-up. Comparator 1 positive input — General purpose I/O. Register enabled pull-up and wake-up. Comparator 1 negative input — A/D Converter analog input CMOS General purpose I/O. Register enabled pull-up. SCK1 PBS0 ST AN2 PBS0 AN PB2 PBPU PBS0 ST CMOS General purpose I/O. Register enabled pull-up. SCS1 PBS0 ST CMOS SPI1 slave select AN3 PBS0 AN PB4 PBPU PBS1 ST PTPI PBS1 ST — PTM capture input INT1 PBS1 INTEG INTC1 ST — External Interrupt 1 AN4 PBS1 AN — A/D Converter analog input PB5 PBPU PBS1 ST STPI PBS1 ST TX1 PBS1 — AN5 PBS1 AN PB4/PTPI/INT1/AN4 PB5/STPI/TX1/AN5 Description — A/D Converter analog input — A/D Converter analog input CMOS General purpose I/O. Register enabled pull-up. CMOS General purpose I/O. Register enabled pull-up. — STM capture input CMOS UART1 TX serial data output — A/D Converter analog input 12 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Pad Name PB6/INT0/RX1/AN6 PB7/VREF/AN7 PC0/CTP0B PC1/CTP1B PC2/PTPB PC3/STPB PC4/CTCK0 PC5/CTCK1 PC6/PTCK/SCL PC7/STCK/SDA PE0/VDDIO Function OPT I/T PB6 PBPU PBS1 ST INT0 PBS1 INTEG INTC0 ST — External Interrupt 0 RX1 PBS1 ST — UART1 RX serial data input AN6 PBS1 AN — A/D Converter analog input PB7 PBPU PBS1 ST VREF PBS1 AN — A/D Converter reference voltage output AN7 PBS1 AN — A/D Converter analog input PC0 PCPU PCS0 ST CMOS General purpose I/O. Register enabled pull-up. CTP0B PCS1 — CMOS CTM0 inverted output PC1 PCPU PCS0 ST CMOS General purpose I/O. Register enabled pull-up. CTP1B PCS1 — CMOS CTM1 inverted output PC2 PCPU PCS0 ST CMOS General purpose I/O. Register enabled pull-up. PTPB PCS0 — CMOS PTM inverted output PC3 PCPU PCS0 ST CMOS General purpose I/O. Register enabled pull-up. STPB PCS0 — CMOS STM inverted output PC4 PCPU PCS1 ST CMOS General purpose I/O. Register enabled pull-up. CTCK0 PCS1 ST PC5 PCPU PCS1 ST CTCK1 PCS1 ST PC6 PCPU PCS1 ST PTCK PCS1 ST SCL PCS1 ST NMOS I2C clock line PC7 PCPU PCS1 ST CMOS General purpose I/O. Register enabled pull-up. STCK PCS1 ST SDA PCS1 ST NMOS I2C data/address line PE0 PEPU PES0 ST CMOS General purpose I/O. Register enabled pull-up. VDDIO PE1/UBUS/VDD PE2/OSC1 PE3/OSC2 PE7/RES Rev. 1.10 PES0 PWR O/T Description CMOS General purpose I/O. Register enabled pull-up. CMOS General purpose I/O. Register enabled pull-up. — CTM0 clock input CMOS General purpose I/O. Register enabled pull-up. — CTM1 clock input CMOS General purpose I/O. Register enabled pull-up. — PTM clock input — STM clock input — PA & PB external power supply PE1 — ST — General purpose Input UBUS — PWR — USB SIE power supply VDD — PWR — Power supply PE2 PEPU PES0 ST OSC1 PES0 HXT PE3 PEPU PES0 ST OSC2 PES0 — PE7 PEPU PES1 ST RES RSTC ST CMOS General purpose I/O. Register enabled pull-up. — HXT oscillator pin CMOS General purpose I/O. Register enabled pull-up. HXT HXT oscillator pin CMOS General purpose I/O. Register enabled pull-up. — External reset pin 13 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Pad Name PF0/CTP0 PF1/CTP1 PF2/PTP PF3/STP Function OPT I/T PF0 PFPU PFS0 O/T Description ST CMOS General purpose I/O. Register enabled pull-up. CTP0 PFS0 — CMOS CTM0 output PF1 PFPU PFS0 ST CMOS General purpose I/O. Register enabled pull-up. CTP1 PFS0 — CMOS CTM1 output PF2 PFPU PFS0 ST CMOS General purpose I/O. Register enabled pull-up. PTP PFS0 — CMOS PTM output PF3 PFPU PFS0 ST CMOS General purpose I/O. Register enabled pull-up. STP PFS0 — CMOS STM output PF4~PF7 PFn — ST CMOS General purpose I/O. Register enabled pull-up. XT1 XT1 — LXT — LXT oscillator pin XT2 XT2 — — LXT LXT oscillator pin UDN/GPIO0 UDN — ST CMOS USB UDN line GPIO0 — ST CMOS General purpose I/O UDP — ST CMOS USB UDP line GPIO1 — ST CMOS General purpose I/O V33O V33O — — CRST CRST — — CMOS Smart Card reset output CCLK CCLK — — CMOS Smart Card clock output CIO — ST CMOS Smart Card data input/output CDET — ST CC4 — ST CMOS Smart Card C4 input/output CMOS Smart Card C8 input/output UDP/GPIO1 CIO CDET CC4 CC8 PWR — 3.3V regulator output Smart Card detection input CC8 — ST CRDVCC — PWR — SELF — PWR — External inductor connection pin for DC/DC converter VO — PWR — External diode connection pin for DC/DC converter CVSS — PWR — DC/DC converter negative power supply, ground. VSS — PWR — Negative power supply, ground. AVDD — PWR — Analog positive power supply AVSS AVSS — PWR — Analog negative power supply, ground. HVDD HVDD — PWR — HIRC oscillator positive power supply NC — — — Non-connected. CRDVCC SELF VO CVSS VSS AVDD NC Positive power supply for external smart cards Note: I/T: Input type O/T: Output type OPT: Optional by configuration option (CO) or register option CO: Configuration option PWR: Power ST: Schmitt Trigger input AN: Analog signal CMOS: CMOS output NMOS: NMOS output HXT: High frequency crystal oscillator LXT: Low frequency crystal oscillator Rev. 1.10 14 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Absolute Maximum Ratings Supply Voltage.................................................................................................... VSS−0.3V to VSS+6.0V Input Voltage...................................................................................................... VSS−0.3V to VDD+0.3V Storage Temperature........................................................................................................ -50˚C to 125˚C Operating Temperature......................................................................................................-40˚C to 85˚C IOH Total ...................................................................................................................................... -80mA IOL Total.........................................................................................................................................80mA Total Power Dissipation.............................................................................................................500mW Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings” may cause substantial damage to these devices. Functional operation of these devices at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect devices reliability. D.C. Characteristics Ta=25°C Symbol VDD Parameter Test Conditions Conditions VDD Min. Typ. Max. Unit fSYS=6MHz 2.2 — 5.5 V fSYS=12MHz 2.7 — 5.5 V — fSYS=12MHz 2.7 — 5.5 V Operating Voltage (LXT) — fSYS=fLXT=32.768kHz 2.2 — 5.5 V Operating Voltage (LIRC) — fSYS=fLIRC=32kHz 2.2 — 5.5 V fSYS=fHXT=6MHz No load, all peripherals off — 0.7 1.5 mA — 1.6 3 mA fSYS=fHXT=12MHz No load, all peripherals off — 1.3 3 mA — 2.7 6 mA fSYS=fHIRC=12MHz No load, all peripherals off — 1.6 3.5 mA — 2.8 6 mA fSYS=fSUB=fLXT=32.768kHz No load, all peripherals off — 17 30 μA — 30 50 μA fSYS=fSUB=fLIRC=32kHz No load, all peripherals off — 16 30 μA — 28 50 μA fSYS=fPLL/8=6MHz, No load, USB and PLL on, other peripherals off — 4.5 9 mA — 9.5 15 mA fSYS=fPLL/4=12MHz, No load, USB and PLL on, other peripherals off — 5 10 mA — 10.5 16 mA — 12 18 mA Operating Voltage (HXT) — Operating Voltage (HIRC) 3V Operating Current (HXT) 5V 3V 5V Operating Current (HIRC) Operating Current (LXT) IDD Operating Current (LIRC) 3V 5V 3V 5V 3V 5V 3V 5V Operating Current (USB) 3V 5V 5V Rev. 1.10 fSYS=fPLL/3=16MHz, No load, USB and PLL on, other peripherals off 15 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Symbol Parameter Standby Current (IDLE0 Mode) Test Conditions 3V fSYS off, fSUB=fLXT on, No load, all peripherals off — 1.2 2.0 μA — 1.5 3.0 μA fSYS off, fSUB=fLIRC on No load, all peripherals off — 1.5 3.0 μA — 2.8 5.0 μA fSYS= fHXT=12MHz on, fSUB on, No load, all peripherals off — 0.65 1.4 mA — 1.3 3.0 mA fSYS= fHIRC=12MHz on, fSUB on, No load, all peripherals off — 0.9 1.5 mA — 1.4 3.0 mA fSYS off, fSUB off, No load, all peripherals off, WDT disabled — 0.2 0.8 μA — 0.5 1.0 μA fSYS off, fSUB=fLXT on No load, all peripherals off, WDT enabled — 1 1.5 μA — 1.3 3.0 μA fSYS off, fSUB=fLIRC on, No load, all peripherals off, WDT enabled — 1.2 3.0 μA — 2.1 5.0 μA 5V 3V 3V ISTB 5V 3V 5V 3V 5V Standby Current (SLEEP Mode) 3V 5V 3V 5V ISUS VIL VIH 5V fH=off, SUSP2=0, RCTRL=0, V33O on, MCU powered down, No load, USB and PLL on, other peripherals off — 330 450 μA 5V fH=off, SUSP2=1, RCTRL=1, V33O off, MCU powered down, No load, USB and PLL on, other peripherals off — 240 330 μA Input Low Voltage for I/O Ports or Input Pins 5V — 0 — 1.5 V — — 0 — 0.2VDD V Input Low Voltage for RES Pin — — 0 — 0.4VDD V Input High Voltage for I/O Ports or Input Pins 5V — 3.5 — 5.0 V — — 0.8VDD — VDD V Input High Voltage for RES Pin — — 0.9VDD — VDD V 17 34 — mA 34 68 — mA -4 -8 — mA -8 -16 — mA Suspend Current (USB) 3V IOL Sink Current for I/O Pins IOH Source Current for I/O Pins VOH Output High Voltage for I/O Ports VOL Output Low Voltage for I/O Ports RPH Pull-high Resistance for I/O Ports 3V 5V ILEAK Input Leakage Current V33O 3.3V Regulator Output Voltage RUDP1 Pull-high Resistance between UDP and V33O 3.3V RUDP2 Pull-high Resistance between UDP and UBUS RUDPN RPL Rev. 1.10 Typ. Max. Unit Conditions 5V Standby Current (IDLE1 Mode) Min. VDD 5V 3V 5V VOL=0.1VDD VOH=0.9VDD 3V IOH= mA 2.7 — — V 5V IOH=5mA 4.5 — — V 3V IOL=4mA — — 0.3 V 5V IOL=10mA — — 0.5 V — 20 60 100 kΩ — 10 30 50 kΩ — — ±1 μA — — ±1 μA 3.0 3.3 3.6 V — Typ. -5% 1.5 Typ. +5% kΩ 5V — Typ. -40% 7.5 Typ. +40% kΩ Pull-high Resistance between UDP/UDN and UBUS 5V — 300 600 800 kΩ Pull-low Resistance to UBUS 5V 0.5 1 1.5 MΩ 3V 5V 5V VIN=VDD or VIN=VSS IV33O=70mA SUSP2=1, RUBUS=0 16 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU A.C. Characteristics Ta=25°C Symbol Parameter fHIRC Condition Typ. Max. Unit — 6 — MHz 2.7V~5.5V fSYS=fHXT=12MHz — 12 — MHz System Clock (HIRC) 2.7V~5.5V fSYS=fHIRC=12MHz — 12 — MHz System Clock (LXT) 2.2V~5.5V fSYS=fLXT=32.768kHz — 32.768 — kHz System Clock (LIRC) 2.2V~5.5V fSYS=fLIRC=32kHz — 32 — kHz Non-USB mode, 2.7V~5.5V Ta=25°C Typ. -3% 12 Typ. +3% MHz 3.0V~5.5V Non-USB mode, Ta=0°C~70°C Typ. -6% 12 Typ. +6% MHz 2.7V~5.5V Non-USB mode, Ta=-40°C~85°C Typ. -10% 12 Typ. +10% MHz Typ. -0.25% 12 Ta=25°C Typ. -10% 32 Typ. +10% kHz Ta= -40°C to 85°C Typ. -40% 32 Typ. +40% kHz 2.2V~5.5V Ta= -40°C to 85°C Typ. -50% 32 Typ. +60% kHz High Speed Internal RC Oscillator (HIRC) 3.3V~5.5V USB mode, Ta=25°C 5V fLIRC Min. 2.2V~5.5V fSYS=fHXT=6MHz System Clock (HXT) fSYS Test Condition VDD Low Speed Internal RC Oscillator (LIRC) 5V±0.5V Typ. MHz +0.25% tTCK CTCKn, STCK, PTCK pin Minimum Input Pulse Width — — 0.3 — — μs tTPI STPI, PTPI pin Minimum Input Pulse Width — — 0.3 — — μs tINT Interrupt Pin Minimum Input Pulse Width — — 10 — — μs tRES External Reset Pin Minimum Input Low Pulse Width — — 10 — — μs System Start-up Timer Period (Wake-up from Power Down Mode and fSYS off or RES Pin Reset) tSST System Start-up Timer Period (Wake-up from Power Down Mode and fSYS on) System Start-up Timer Period (SLOW Mode→NORMAL Mode) (NORMAL Mode→SLOW Mode) (fHXT/fHIRC Switch, fLXT/fLIRC Switch) tRSTD — fSYS=fH=fHXT~fHXT/64 128 — — tHXT — fSYS=fH =fHIRC~fHIRC/64 16 — — tHIRC — fSYS=fSUB=fLXT 1024 — — tLXT — fSYS=fSUB=fLIRC 2 — — tLIRC — fSYS=fH~fH/64, fH=fHXT or fHIRC 2 — — tH — fSYS=fSUB=fLXT or fLIRC — fHXT off→on (HXTF=1) — fHIRC off→on (HIRCF=1) — fLXT off→on (LXTF=1) 2 — — tSUB 1024 — — tHXT 16 — — tHIRC 1024 — — tLXT System Start-up Timer Period (WDT Hardware Reset) — — 0 — — tSYS System Reset Delay Time (Power-on Reset, LVR Hardware Reset, LVRC/WDTC/RSTC Software Reset) — — 25 50 100 ms System Reset Delay Time (RES pin Reset, USB Reset WDT Hardware Reset) — — 8.3 16.7 33.3 ms Note: tSYS= 1/fSYS Rev. 1.10 17 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU LVD/LVR Electrical Characteristics Ta=25°C Symbol Parameter Test Conditions Conditions VDD Min. Typ. Max. Unit LVR Enable, voltage select 2.1V VLVR VLVD VBG Low Voltage Reset Voltage Low Voltage Detector Voltage Bandgap Reference Voltage ILVRLVDBG LVD/LVR Operating Current tBGS tLVDS VBG Turn on Stable Time — — 2.1 LVR Enable, voltage select 2.55V Typ. 2.55 Typ. LVR Enable, voltage select 3.15V -5% 3.15 +5% LVR Enable, voltage select 3.8V 3.8 LVD Enable, voltage select 2.0V 2.0 LVD Enable, voltage select 2.2V 2.2 LVD Enable, voltage select 2.4V 2.4 LVD Enable, voltage select 2.7V 2.7 Typ. +5% V LVD Enable, voltage select 4.0V 4.0 — Typ. Typ. 1.04 -5% +5% V LVD Enable, voltage select 3.0V Typ. -5% V 3.0 LVD Enable, voltage select 3.3V 3.3 LVD Enable, voltage select 3.6V 3.6 — 3V LVD/LVR Enable, VBGEN=0 — 15 20 5V LVD/LVR Enable, VBGEN=0 — 20 30 μA 3V LVD/LVR Enable, VBGEN=1 — 100 150 μA 5V LVD/LVR Enable, VBGEN=1 — 145 200 μA — No load — — 150 μs — For LVR enable, VBGEN=0, LVD off→on — — 15 μs — For LVR disable, VBGEN=0, LVD off→on — — 150 μs LVDO Stable Time μA tLVR Minimum Low Voltage Width to Reset — — 120 240 480 μs tLVD Minimum Low Voltage Width to Interrupt — — 60 120 240 μs ILVR Additional Current for LVR Enabled 5V LVD disable, VBGEN=0 — 14 20 μA ILVD Additional Current for LVD Enabled 5V LVR disable, VBGEN=0 — 7 15 μA IBG Additional Current for Bandgap Circuit Enabled 3V — 85 150 μA — 125 200 μA Rev. 1.10 5V LVR disable, LVD disable 18 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU A/D Converter Characteristics Operating Temperature: -40°C~85°C, unless otherwise specified. Symbol Parameter Test Conditions VDD Conditions Min. Typ. Max. Unit AVDD Operating Voltage — — 2.7 — 5.5 V VADI Input Voltage — — 0 — VREF V VREF Reference Voltage — — 2 — AVDD V VREF=AVDD, tADCK=0.5μs or 10μs — — ±3 LSB VREF=AVDD, tADCK=0.5μs or 10μs — — ±4 LSB — 1.0 2.0 mA — 1.5 3.0 mA 3V DNL Differential Non-linearity INL Integral Non-linearity IADC Additional Current Consumption for A/D Converter Enabled 3V tADCK Clock Period — — 0.5 — 10 μs tON2ST A/D Converter On-to-Start Time — — 4 — — μs tADC Conversion Time (Including A/D Sample and Hold Time) — — — 16 — tADCK GERR Gain Error VREF=AVDD —4 — ＋4 LSB OSRR Offset Error VREF=AVDD —4 — ＋4 LSB Rev. 1.10 5V 3V 5V 5V 3V 5V 3V 5V No load, tADCK =0.5μs 19 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Comparator Electrical Characteristics Ta=25°C, All measurement is under CMPnINP input voltage=(VDD-1.4)/2 and remain constant Symbol Parameter Test Conditions VDD Conditions — VDD Operating Voltage — ICMP Additional Current for Comparator Enabled 3V VOS Input Offset Voltage 5V CNVTn[1:0]=00B 2.7 — 5.5 V — 1.8 3 μA 3 μA -10 — 10 mV Without Calibration, CNVTn[1:0]=00B, CnOF[4:0]=10000B -10 — 10 mV 3V With Calibration, CNVTn[1:0]=00B -4 — 4 mV 5V With Calibration, CNVTn[1:0]=00B -4 — 4 mV VSS — VDD-1.4 V 10 24 30 mV 10 24 30 mV 60 — — dB 60 80 — dB With 10mV overdrive, CLOAD=3pF, 3V CNVTn[1:0]=00B — — 35 μs 5V With 10mV overdrive, CLOAD=3pF, CNVTn[1:0]=00B — — 35 μs 3V With 100mV overdrive, CLOAD=3pF, CNVTn[1:0]=00B — — 3 μs 5V With 100mV overdrive, CLOAD=3pF, CNVTn[1:0]=00B — — 3 μs 3V With 10mV overdrive, CLOAD=3pF, CNVTn[1:0]=01B — — 4 μs 5V With 10mV overdrive, CLOAD=3pF, CNVTn[1:0]=01B — — 4 μs 3V With 100mV overdrive, CLOAD=3pF, CNVTn[1:0]=01B — — 0.6 μs 5V With 100mV overdrive, CLOAD=3pF, CNVTn[1:0]=01B — — 0.6 μs 3V With 10mV overdrive, CLOAD=3pF, CNVTn[1:0]=10B — — 2 μs 5V With 10mV overdrive, CLOAD=3pF, CNVTn[1:0]=10B — — 2 μs 3V With 100mV overdrive, CLOAD=3pF, CNVTn[1:0]=10B — — 0.3 μs 5V With 100mV overdrive, CLOAD=3pF, CNVTn[1:0]=10B — — 0.3 μs 3V With 10mV overdrive, CLOAD=3pF, CNVTn[1:0]=11B — — 1 μs 5V With 10mV overdrive, CLOAD=3pF, CNVTn[1:0]=11B — — 1 μs 3V With 100mV overdrive, CLOAD=3pF, CNVTn[1:0]=11B — — 0.25 μs 5V With 100mV overdrive, CLOAD=3pF, CNVTn[1:0]=11B — — 0.25 μs 5V Hysteresis Rev. 1.10 Unit 1.9 VHYS tRP Max. — Common Mode Voltage — CNVTn[1:0]=00B Open Loop Gain Typ. Without Calibration, 3V CNVTn[1:0]=00B, CnOF[4:0]=10000B VCM AOL Min. 3V 5V 3V 5V Response Time CNVTn[1:0]=00B CNVTn[1:0]=00B 20 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU DC/DC Converter & LDO Electrical Characteristics Ta=25°C, VDD=VIN, L=100μH, Current rating ≥ 100mA, DC resistance ≤ 2Ω Symbol VIN VOUT_DCDC VOUT_LDO IOUT IQ ΔVOUT_LDO _RIPPLE IOCDET tOCDET tOFF Rev. 1.10 Parameter DC/DC Input Voltage Range (AVDD Pin) DC/DC Output Voltage (VO Pin) LDO Output Voltage (CRDVCC Pin) LDO Output Current LDO Quiescent Current LDO Output Voltage Ripple (CRDVCC Pin) Current Overload Detection Current Overload Detection Time LDO Output Turn Off Time Test Conditions Conditions VDD Min. Typ. Max. Unit 3V and 5V Regulator output, DCEN=1 2.8 — 1.8V Regulator output, DCEN=1 2.8 — 3.4 V — 1.8V Regulator output, DCEN=0 3.4 — 5.5 V — — 5.5 V — VIN=2.8V~4.0V, VSEL=0, VC[1:0]=10B, ILOAD=55mA Typ. -5% 3.8 Typ. +5% V — VIN=2.8V ~ 5.5V, VSEL=1, VC[1:0]=11B, ILOAD=55mA Typ. -5% 5.5 Typ. +5% V — VIN=2.8V, VOUT_DCDC=3.8V, VC[1:0]=01B, ILOAD=35mA 1.66 1.8 1.94 V — VIN=2.8V, VOUT_DCDC=3.8V, VC[1:0]=10B, ILOAD=55mA 2.76 3 3.24 V — VIN=2.8V, VOUT_DCDC=5.5V, VC[1:0]=11B, ILOAD=55mA 4.6 5 5.4 V — VC[1:0]=01B, ΔVOUT_LDO=-3% 35 — — mA — VC[1:0]=10B, ΔVOUT_LDO=-3% 55 — — mA — VC[1:0]=11B, ΔVOUT_LDO=-3% 55 — — mA — VC[1:0]=11B, no load — 190 250 μA VIN =2.8V, VOUT_DCDC=3.8V, DCEN=1, — VC[1:0]=01B, ILOAD=35mA — — 200 mV — VIN =2.8V, VOUT_DCDC=3.8V, DCEN=1, VC[1:0]=10B, ILOAD=55mA — — 200 mV — VIN =2.8V, VOUT_DCDC=5.5V, DCEN=1, VC[1:0]=11B, ILOAD=55mA — — 200 mV — VIN =2.8V, VOUT_DCDC=3.8V, VC[1:0]=01B Typ. -5% 90 Typ. +5% mA — VIN =2.8V, VOUT_DCDC=3.8V, VC[1:0]=10B Typ. -5% 100 Typ. +5% mA — VIN =2.8V, VOUT_DCDC=5.5V, VC[1:0]=11B Typ. -5% 120 Typ. +5% mA VIN =2.8V, VOUT_DCDC=3.8V, — VC[1:0]=01B, ILOAD from 35mA to 150mA — — 1400 μs VIN =2.8V, VOUT_DCDC=3.8V, — VC[1:0]=10B, ILOAD from 55mA to 150mA — — 1400 μs VIN =2.8V, VOUT_DCDC=5.5V, — VC[1:0]=11B, ILOAD from 55mA to 150mA — — 1400 μs VIN =2.8V, VOUT_DCDC=3.8V, — VC[1:0]=01B, ILOAD=35mA, VOUT_LDO from VOUT_LDO to 0.4V — — 750 μs VIN =2.8V, VOUT_DCDC=3.8V, — VC[1:0]=10B, ILOAD=55mA, VOUT_LDO from VOUT_LDO to 0.4V — — 750 μs VIN =2.8V, VOUT_DCDC=5.5V, — VC[1:0]=11B, ILOAD=55mA, VOUT_LDO from VOUT_LDO to 0.4V — — 750 μs 21 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Symbol tON Parameter LDO Output Turn on Time Test Conditions Min. Conditions VDD Typ. Max. Unit VIN=2.8V, VOUT_DCDC=3.8V, — VC[1:0]=01B, ILOAD=35mA, VOUT_LDO from 0V to 1.66V — — 750 μs VIN =2.8V, VOUT_DCDC=3.8V, — VC[1:0]=10B, ILOAD=55mA, VOUT_LDO from 0V to 2.76V — — 750 μs VIN =2.8V, VOUT_DCDC=5.5V, — VC[1:0]=11B, ILOAD=55mA, VOUT_LDO from 0V to 4.6V — — 750 μs — — V — — V — — V V5PWRGOOD LDO 5V Power Good Voltage — VIN=2.8V, VOUT_DCDC=5.5V, no load V3PWRGOOD LDO 3V Power Good Voltage — VIN=2.8V, VOUT_DCDC=3.8V, no load VOUT_LDO ×94% V18PWRGOOD LDO 1.8V Power Good Voltage — VIN=2.8V, VOUT_DCDC=3.8V, no load ISO7816-3 Interface Electrical Characteristics Ta=25°C Symbol Parameter Test Conditions VDD Conditions Min. Typ. Max. Unit VIH Smart Card Interface Input High Voltage for CIO, CC4, CC8, CDET — — 0.6VCRDVCC — VCRDVCC V VIL Smart Card Interface Input Low Voltage for CIO, CC4, CC8, CDET — — 0 — 0.2VCRDVCC V VOH Smart Card Interface Output High Voltage — -0.1mA < IOH < 0 for CIO, CC4, CC8, CCLK, CRST 0.8VCRDVCC — VCRDVCC V VOL Smart Card Interface Output Low Voltage — 0 < IOL < 1mA for CIO, CC4, CC8, CCLK, CRST 0 — 0.15VCRDVCC V tR, tF RPH Smart Card Interface Rising and Falling Slew Rate Pull-high Resistance for CDET Pin Pull-high Resistance for CIO Pin Rev. 1.10 — CIO, CC4, CC8 pins, CIN (ICC)=30pF max. — 0 1 μs — CCLK pin, CIN (ICC)=30pF max. — 0 1 μs — CRST pin, CIN (ICC)=30pF max. — 0 1 μs 20 60 100 10 30 50 7.5 15 22.5 3V — 5V — — 22 kΩ kΩ August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU LXT Oscillator Electrical Characteristics Ta=25°C Symbol Test Conditions Parameter Min. Typ. Max. Unit Conditions VDD Operating Voltage — External R=10MΩ, C1/C2=20pF 2.2 — 5.5 V ILXT Operating Current External R=10MΩ, C1/C2=20pF, 3V CL=12.5pF — 0.9 1.5 μA CL Load Capacitor — — 6 12.5 — pF ESR Equivalent Series Resistance — — — — 40 kΩ OA Oscillation Allowance or Negative Resistance — External R=10MΩ, C1/C2=20pF 200 — — kΩ VDD Power-on Reset Characteristics Ta=25°C Symbol Test Conditions Parameter VDD Conditions Min. Typ. Max. Unit VPOR VDD Start Voltage to Ensure Power-on Reset — — — — 100 mV RRPOR VDD Raising Rate to Ensure Power-on Reset — — 0.035 — — V/ms tPOR Minimum Time for VDD Stays at VPOR to Ensure Power-on Reset — — 1 — — ms tPOR RRPOR VDD VPOR Rev. 1.10 23 Time August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU System Architecture A key factor in the high-performance features of the Holtek range of microcontrollers is attributed to their internal system architecture. The range of devices take advantage of the usual features found within RISC microcontrollers providing increased speed of operation and enhanced performance. The pipelining scheme is implemented in such a way that instruction fetching and instruction execution are overlapped, hence instructions are effectively executed in one cycle, with the exception of branch or call instructions. An 8-bit wide ALU is used in practically all instruction set operations, which carries out arithmetic operations, logic operations, rotation, increment, decrement, branch decisions, etc. The internal data path is simplified by moving data through the Accumulator and the ALU. Certain internal registers are implemented in the Data Memory and can be directly or indirectly addressed. The simple addressing methods of these registers along with additional architectural features ensure that a minimum of external components is required to provide a functional I/O and A/D control system with maximum reliability and flexibility. This makes these devices suitable for low-cost, high-volume production for controller applications. Clocking and Pipelining The main system clock, derived from either a HXT, LXT, HIRC or LIRC oscillator is subdivided into four internally generated non-overlapping clocks, T1~T4. The Program Counter is incremented at the beginning of the T1 clock during which time a new instruction is fetched. The remaining T2~T4 clocks carry out the decoding and execution functions. In this way, one T1~T4 clock cycle forms one instruction cycle. Although the fetching and execution of instructions takes place in consecutive instruction cycles, the pipelining structure of the microcontroller ensures that instructions are effectively executed in one instruction cycle. The exception to this are instructions where the contents of the Program Counter are changed, such as subroutine calls or jumps, in which case the instruction will take one more instruction cycle to execute. For instructions involving branches, such as jump or call instructions, two machine cycles are required to complete instruction execution. An extra cycle is required as the program takes one cycle to first obtain the actual jump or call address and then another cycle to actually execute the branch. The requirement for this extra cycle should be taken into account by programmers in timing sensitive applications. fSYS (System Clock) Phase Clock T1 Phase Clock T2 Phase Clock T3 Phase Clock T4 Program Counter Pipelining PC PC+1 PC+2 Fetch Inst. (PC) Execute Inst. (PC-1) Fetch Inst. (PC+1) Execute Inst. (PC) Fetch Inst. (PC+2) Execute Inst. (PC+1) System Clocking and Pipelining Rev. 1.10 24 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU 1 MOV A,[12H] 2 CALL DELAY 3 CPL [12H] 4 : 5 : 6 DELAY: NOP Fetch Inst. 1 Execute Inst. 1 Fetch Inst. 2 Execute Inst. 2 Fetch Inst. 3 Flush Pipeline Fetch Inst. 6 Execute Inst. 6 Fetch Inst. 7 Instruction Featching Program Counter During program execution, the Program Counter is used to keep track of the address of the next instruction to be executed. It is automatically incremented by one each time an instruction is executed except for instructions, such as “JMP” or “CALL” that demand a jump to a nonconsecutive Program Memory address. As the device memory capacity is greater than 8K words, the Program Memory address may be located in a certain program memory bank which is selected by the program memory bank pointer bit, PMBP0. Only the lower 8 bits, known as the Program Counter Low Register, are directly addressable by the application program. When executing instructions requiring jumps to non-consecutive addresses such as a jump instruction, a subroutine call, interrupt or reset, etc., the microcontroller manages program control by loading the required address into the Program Counter. For conditional skip instructions, once the condition has been met, the next instruction, which has already been fetched during the present instruction execution, is discarded and a dummy cycle takes its place while the correct instruction is obtained. Device Program Counter High Byte Low Byte (PCL) HT66F4360 PMBP0, PC12~PC8 PC7~PC0 HT66F4370 PMBP1~PMBP0, PC12~PC8 PC7~PC0 Program Counter The lower byte of the Program Counter, known as the Program Counter Low register or PCL, is available for program control and is a readable and writeable register. By transferring data directly into this register, a short program jump can be executed directly; however, as only this low byte is available for manipulation, the jumps are limited to the present page of memory that is 256 locations. When such program jumps are executed it should also be noted that a dummy cycle will be inserted. Manipulating the PCL register may cause program branching, so an extra cycle is needed to pre-fetch. Stack This is a special part of the memory which is used to save the contents of the Program Counter only. The stack has multiple levels and is neither part of the data nor part of the program space, and is neither readable nor writeable. The activated level is indexed by the Stack Pointer, and is neither readable nor writeable. At a subroutine call or interrupt acknowledge signal, the contents of the Program Counter are pushed onto the stack. At the end of a subroutine or an interrupt routine, signaled by a return instruction, RET or RETI, the Program Counter is restored to its previous value from the stack. After a device reset, the Stack Pointer will point to the top of the stack. Rev. 1.10 25 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU If the stack is full and an enabled interrupt takes place, the interrupt request flag will be recorded but the acknowledge signal will be inhibited. When the Stack Pointer is decremented, by RET or RETI, the interrupt will be serviced. This feature prevents stack overflow allowing the programmer to use the structure more easily. However, when the stack is full, a CALL subroutine instruction can still be executed which will result in a stack overflow. Precautions should be taken to avoid such cases which might cause unpredictable program branching. If the stack is overflow, the first Program Counter save in the stack will be lost. Program Counter Top of Stack Stack Pointer Bottom of Stack Stack Level 1 Stack Level 2 Stack Level 3 : : : Program Memory Stack Level N Note: N=12 for HT66F4360/HT66F4370 Arithmetic and Logic Unit – ALU The arithmetic-logic unit or ALU is a critical area of the microcontroller that carries out arithmetic and logic operations of the instruction set. Connected to the main microcontroller data bus, the ALU receives related instruction codes and performs the required arithmetic or logical operations after which the result will be placed in the specified register. As these ALU calculation or operations may result in carry, borrow or other status changes, the status register will be correspondingly updated to reflect these changes. The ALU supports the following functions: • Arithmetic operations: ADD, ADDM, ADC, ADCM, SUB, SUBM, SBC, SBCM, DAA LADD, LADDM, LADC, LADCM, LSUB, LSUBM, LSBC, LSBCM, LDAA • Logic operations: AND, OR, XOR, ANDM, ORM, XORM, CPL, CPLA LAND, LOR, LXOR, LANDM, LORM, LXORM, LCPL, LCPLA • Rotation: RRA, RR, RRCA, RRC, RLA, RL, RLCA, RLC LRRA, LRR, LRRCA, LRRC, LRLA, LRL, LRLCA, LRLC • Increment and Decrement: INCA, INC, DECA, DEC LINCA, LINC, LDECA, LDEC • Branch decision: JMP, SZ, SZA, SNZ, SIZ, SDZ, SIZA, SDZA, CALL, RET, RETI LSZ, LSZA, LSNZ, LSIZ, LSDZ, LSIZA, LSDZA Rev. 1.10 26 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Flash Program Memory The Program Memory is the location where the user code or program is stored. For these devices series the Program Memory are Flash type, which means it can be programmed and re-programmed a large number of times, allowing the user the convenience of code modification on the same device. By using the appropriate programming tools, these Flash devices offer users the flexibility to conveniently debug and develop their applications while also offering a means of field programming and updating. Device Capacity Banks HT66F4360 16K × 16 0~1 HT66F4370 32K × 16 0~3 Structure The Program Memory has a capacity of 16K×16 to 32K×16 bits. The Program Memory is addressed by the Program Counter and also contains data, table information and interrupt entries. Table data, which can be setup in any location within the Program Memory, is addressed by a separate table pointer registers. 000H HT66F4360 HT66F4370 Initialisation Vector Initialisation Vector Interrupt Vectors Interrupt Vectors Look-up Table Look-up Table 16 bits 16 bits Bank 1 Bank 1 004H 03CH n00H nFFH 1FFFH 2000H 3FFFH 4000H Bank 2 5FFFH 6000H Bank 3 7FFFH Program Memory Structure Special Vectors Within the Program Memory, certain locations are reserved for the reset and interrupts. The location 000H is reserved for use by these devices reset for program initialisation. After a device reset is initiated, the program will jump to this location and begin execution. Rev. 1.10 27 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Look-up Table Any location within the Program Memory can be defined as a look-up table where programmers can store fixed data. To use the look-up table, the table pointer must first be setup by placing the address of the look up data to be retrieved in the table pointer register, TBLP and TBHP. These registers define the total address of the look-up table. After setting up the table pointer, the table data can be retrieved from the Program Memory using the “TABRD [m]” or “TABRDL [m]” instructions respectively when the memory [m] is located in sector 0. If the memory [m] is located in other sectors except sector 0, the data can be retrieved from the program memory using the corresponding extended table read instruction such as “LTABRD [m]” or “LTABRDL [m]” respectively. When the instruction is executed, the lower order table byte from the Program Memory will be transferred to the user defined Data Memory register [m] as specified in the instruction. The higher order table data byte from the Program Memory will be transferred to the TBLH special register. Any unused bits in this transferred higher order byte will be read as “0”. The accompanying diagram illustrates the addressing data flow of the look-up table. Program Memory Address Last Page or TBHP Register TBLP Register Data 16 bits Register TBLH User Selected Register High Byte Low Byte Table Program Example The accompanying example shows how the table pointer and table data is defined and retrieved from the device. This example uses raw table data located in the last page which is stored there using the ORG statement. The value at this ORG statement is “7F00H” which refers to the start address of the last page within the 32K Program Memory of the device if the ISP bootloader provided by HOLTEK IDE tool is not used. The table pointer low byte register is setup here to have an initial value of “06H”. This will ensure that the first data read from the data table will be at the Program Memory address “7F06H” or 6 locations after the start of the last page. Note that the value for the table pointer is referenced to the first address of the present page pointed by the TBHP register if the “TABRD [m]” instruction is being used. The high byte of the table data which in this case is equal to zero will be transferred to the TBLH register automatically when the “TABRD [m]” instruction is executed. Because the TBLH register is a read/write register and can be restored, care should be taken to ensure its protection if both the main routine and Interrupt Service Routine use table read instructions. If using the table read instructions, the Interrupt Service Routines may change the value of the TBLH and subsequently cause errors if used again by the main routine. As a rule it is recommended that simultaneous use of the table read instructions should be avoided. However, in situations where simultaneous use cannot be avoided, the interrupts should be disabled prior to the execution of any main routine table-read instructions. Note that all table related instructions require two instruction cycles to complete their operation. Rev. 1.10 28 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Table Read Program Example rombank 3 code3 ds .section ‘data’ tempreg1db ? ; temporary register#1 tempreg2db ? ; temporary register#2 : : code0 .section ‘code’ mov a,06h ; initialise table pointer - note that this address is referenced mov tblp,a ; to the last page or the page that tbhp pointed mov a,7fh; initialise high table pointer mov tbhp,a ; it is not necessary to set tbhp if executing tabrdl : : tabrdc tempreg1 ; transfers value in table referenced by table pointer ; register pair to tempregl tabrdl tempreg1 ; data at prog.memory address 7F06H transferred to tempreg1 and TBLH dec tblp ; reduce value of table pointer by one tabrdc tempreg2 ; transfers value in table referenced by table pointer ; register pairto tempreg2 tabrdl tempreg2 ; data at prog.memory address 7F05H transferred to tempreg2 and TBLH ; in this example the data 1AH is transferred to tempreg1 and data ; 0FH to tempreg2 ; the value 00H will be transferred to the high byte register TBLH : : Code3 .section ‘code’ org 1F00h ; sets initial address of lastpage dc00Ah,00Bh,00Ch,00Dh,00Eh,00Fh,01Ah,01Bh In Circuit Programming – ICP The provision of Flash type Program Memory provides the user with a means of convenient and easy upgrades and modifications to their programs on the same device. As an additional convenience, Holtek has provided a means of programming the microcontroller incircuit using a 4-pin interface. This provides manufacturers with the possibility of manufacturing their circuit boards complete with a programmed or un-programmed microcontroller, and then programming or upgrading the program at a later stage. This enables product manufacturers to easily keep their manufactured products supplied with the latest program releases without removal and reinsertion of the device. Holtek Writer Pins MCU Programming Pins Pin Description ICPDA PA0 Programming Serial Data/Address ICPCK PA2 Programming Clock VDD VDD/HVDD VSS VSS Power Supply Ground The Program Memory can be programmed serially in-circuit using this 4-wire interface. Data is downloaded and uploaded serially on a single pin with an additional line for the clock. Two additional lines are required for the power supply. The technical details regarding the in-circuit programming of the device are beyond the scope of this document and will be supplied in supplementary literature. During the programming process, the user must take care of the ICPDA and ICPCK pins for data and clock programming purposes to ensure that no other outputs are connected to these two pins. Rev. 1.10 29 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Note: * may be resistor or capacitor. The resistance of * must be greater than 300Ω or the capacitance of * must be less than 1nF. On-Chip Debug Support – OCDS There is an EV chip named HT66V43x0 which is used to emulate the real MCU device named HT66F43x0. The EV chip device also provides the “On-Chip Debug” function to debug the real MCU device during development process. The EV chip and real MCU devices, HT66V43x0 and HT66F43x0, are almost functional compatible except the “On-Chip Debug” function. Users can use the EV chip device to emulate the real MCU device behaviors by connecting the OCDSDA and OCDSCK pins to the Holtek HT-IDE development tools. The OCDSDA pin is the OCDS Data/Address input/output pin while the OCDSCK pin is the OCDS clock input pin. When users use the EV chip device for debugging, the corresponding pin functions shared with the OCDSDA and OCDSCK pins in the real MCU device will have no effect in the EV chip. However, the two OCDS pins which are pin-shared with the ICP programming pins are still used as the Flash Memory programming pins for ICP. For more detailed OCDS information, refer to the corresponding document named “Holtek e-Link for 8-bit MCU OCDS User’s Guide”. Holtek e-Link Pins EV Chip OCDS Pins Pin Description OCDSDA OCDSDA On-Chip Debug Support Data/Address input/output OCDSCK OCDSCK On-Chip Debug Support Clock input VDD VDD/HVDD VSS VSS Power Supply Ground In System Programming – ISP The provision of Flash type Program Memory provides the user with a means of convenient and easy upgrades and modifications to their programs on the same device. As an additional convenience, Holtek has provided a means of programming the microcontroller in-system using a two-line USB interface. This provides manufacturers with the possibility of manufacturing their circuit boards complete with a programmed or un-programmed microcontroller, and then programming or upgrading the program at a later stage. This enables product manufacturers to easily keep their manufactured products supplied with the latest program releases without removal and re-insertion of the devices. Rev. 1.10 30 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU The Program Memory can be programmed serially in-system using the USB interface, namely using the UDN and UDP pins. The power is supplied by the UBUS pin. The technical details regarding the in-system programming of these devices are beyond the scope of this document and will be supplied in supplementary literature. The Flash Program Memory Read/Write function is implemented using a series of registers. Flash Memory Read/Write Page Size The page and buffer size is assigned as 64 words for this series of devices. The write buffer is controlled by the CLWB bit in the FRCR register. The CLWB bit can be set high to enable the Clear Write Buffer procedure, as the procedure is finished, this bit will be cleared to low by hardware. The Write Buffer is filled when the FWEN bit is set to high. When the FWEN bit is set high, the data in the Write buffer will be written to the Flash Memory. The FWT bit is used to initiate the writing process and then indicate the writing operation status. This bit is set high to initiate a writing process and will be cleared by hardware if the write process is finished. The Read Byte can be assigned by the address. The FRDEN bit is used to enable the read function and the FRD bit is used to initiate the reading process and then indicate the reading operation status. When the reading process is finished, this bit will be cleared by hardware. Device HT66F4360 HT66F4370 Flash Memory Page Size Write Buffer Size 64 words 64 words Flash Memory Write Buffer FARH FARL FARH FARL FD0H FD0L FD0H FD0L Read one word to FD0H/FD0L CLWB Write one word to FD0H/FD0L Note: 1. Writing a data into high byte, which means the High/Low byte Data is written into the Write Buffer, will cause the Flash memory address increased by one automatically and the new address will be loaded to the FARH and FARL registers. However, the user can also fill the new address by filling the data into FARH and FARL registers in the same page, then the data will be written into the corresponding address. 2. If the address already reached the page boundary of the flash memory, 111111b of the 64 words, the address will not be increased and the address will stop at the last address of that page and the writing operation is invalid. 3. When the address already reached the page boundary of the flash memory, the user has to set a new address again to fill a new data. 4. If the data is written using the write buffer, the write buffer will be cleared by hardware automatically after the write procedure is ready in 2ms. 5. For the first time to use the Write buffer or renew the data in the Write buffer, the user can use the Clear buffer bit, CLWB, to clear the write buffer. Rev. 1.10 31 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU ISP Bootloader The devices provide the ISP Bootloader function to upgrade the software in the Flash memory. The user can select to use the ISP Bootloader application software provided by Holtek IDE tool or to create his own Bootloader software. When the Holtek Bootloader software is selected, that will occupy 0.5K words area in the Flash memory. The accopanying diagram illustrates the Flash memory structure with Holtek Bootloader software. HT66F4360 HT66F4370 Bootloader 0000H Bootloader 0000H Bank 0 Bank 0 1FFFH 1FFFH Bank 1 3D00H 3DFFH Bank 1 3FFFH Last Page Bank 2 5FFFH Bank 3 7D00H 7DFFH Last Page Flash Program Memory Structure with Bootloader Flash Program Memory ISP Registers There are two address registers, four 16-bit data registers and two control registers. The address and data high byte registers together with the control registers are located in Sector 1 while other registers are located in Sector 0. Read and Write operations to the Flash memory are carried out in 16-bit data operations using the address and data registers and the control register. Several registers control the overall operation of the internal Flash Program Memory. The address registers are named FARL and FARH, the data registers are named FDnL and FDnH, and the control registers are named FCR and FRCR. As the FARL and FDnL registers are located in Sector 0, they can be directly accessed in the same was as any other Special Function Register. The FARH, FDnH, FCR and FRCR registers, however, being located in Sector 1, can be addressed directly only using the corresponding extended instructions or can be read from or written to indirectly using the MP1H/ MP1L or MP2H/MP2L Memory Pointer pairs and Indirect Addressing Register, IAR1 or IAR2. Rev. 1.10 32 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Register Name Bit 7 6 5 4 CFWEN FMOD2 FMOD1 FMOD0 FCR — 3 2 1 BWT FWT FRDEN FRD — — — CLWB D4 0 FRCR FAS D6 FARL A7 A6 A5 A4 A3 A2 A1 A0 FARH (HT66F4360) — — A13 A12 A11 A10 A9 A8 FARH (HT66F4370) — A14 A13 A12 A11 A10 A9 A8 FD0L D7 D6 D5 D4 D3 D2 D1 D0 FD0H D15 D14 D13 D12 D11 D10 D9 D8 FD1L D7 D6 D5 D4 D3 D2 D1 D0 FD1H D15 D14 D13 D12 D11 D10 D9 D8 FD2L D7 D6 D5 D4 D3 D2 D1 D0 FD2H D15 D14 D13 D12 D11 D10 D9 D8 FD3L D7 D6 D5 D4 D3 D2 D1 D0 FD3H D15 D14 D13 D12 D11 D10 D9 D8 ISP Registers List • FARL Register Bit 7 6 5 4 3 2 1 0 Name A7 A6 A5 A4 A3 A2 A1 A0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0 Flash Memory Address bit 7 ~ bit 0 • FARH Register – HT66F4360 Bit 7 6 5 4 3 2 1 0 Name — — A13 A12 A11 A10 A9 A8 R/W — — R/W R/W R/W R/W R/W R/W POR — — 0 0 0 0 0 0 Bit 7~6 Unimplemented, read as “0” Bit 5~0 Flash Memory Address bit 13 ~ bit 8 • FARH Register – HT66F4370 Rev. 1.10 Bit 7 6 5 4 3 2 1 0 Name — A14 A13 A12 A11 A10 A9 A8 R/W — R/W R/W R/W R/W R/W R/W R/W POR — 0 0 0 0 0 0 0 Bit 7 Unimplemented, read as “0” Bit 6~0 Flash Memory Address bit 14 ~ bit 8 33 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • FD0L Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0 The first Flash Memory data bit 7 ~ bit 0 • FD0H Register Bit 7 6 5 4 3 2 1 0 Name D15 D14 D13 D12 D11 D10 D9 D8 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 3 2 1 0 Bit 7~0 The first Flash Memory data bit 15 ~ bit 8 • FD1L Register Bit 7 6 5 4 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0 The second Flash Memory data bit 7 ~ bit 0 • FD1H Register Bit 7 6 5 4 3 2 1 0 Name D15 D14 D13 D12 D11 D10 D9 D8 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0 The second Flash Memory data bit 15 ~ bit 8 • FD2L Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 3 2 1 0 Bit 7~0 The third Flash Memory data bit 7 ~ bit 0 • FD2H Register Bit 6 5 4 Name D15 D14 D13 D12 D11 D10 D9 D8 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0 Rev. 1.10 7 The third Flash Memory data bit 15 ~ bit 8 34 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • FD3L Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0 The fourth Flash Memory data bit 7 ~ bit 0 • FD3H Register Bit 7 6 5 4 3 2 1 0 Name D15 D14 D13 D12 D11 D10 D9 D8 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0 The fourth Flash Memory data bit 15 ~ bit 8 • FC0 Register Bit 7 6 5 4 3 2 1 0 Name CFWEN FMOD2 FMOD1 FMOD0 BWT FWT FRDEN FRD R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 1 1 1 0 0 0 0 Bit 7CFWEN: Flash Memory Write mode, FWEN, enable control 0: Disable 1: Unimplemented This bit is used to control the FWEN bit enable or disable. When this bit is cleared to low by software, the Flash memory write enable control bit, FWEN, will be cleared to low as well. It’s ineffective to set this bit to high. The user can check this bit to confirm the FWEN status. Bit 6~4FMOD2~FMOD0: Flash memory Mode selection 000: Write memory mode 001: Page erase mode 010: Reserved 011: Read memory mode 10x: Reserved 110: FWEN mode – Flash memory Write function Enabled mode 111: Reserved Bit 3BWT: Mode change control 0: Mode change cycle has finished 1: Activate a mode change cycle This bit will be automatically reset to zero by the hardware after the mode change cycle has finished. Bit 2FWT: Flash memory Write Initiate control 0: Do not initiate Flash memory write or Flash memory write process is completed 1: Initiate Flash memory write process This bit is set by software and cleared by hardware when the Flash memory write process is completed. Bit 1FRDEN: Flash memory Read Enable control 0: Flash memory read disable 1: Flash memory read enable This bit must be set high before the flash memory read operation is carried out. Clearing this bit to zero will inhibit the flash memory read operations. Rev. 1.10 35 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 0FRD: Flash memory Read Initiate control 0: Do not initiate Flash memory read or Flash memory read process is completed 1: Initiate Flash memory read process This bit is set by software and cleared by hardware when the Flash memory read process is completed. Note: The FWT, FRDEN and FRD bits can not be set to “1” at the same time with a single instruction. • FRCR Register Bit 7 6 5 4 3 2 1 0 Name FAS D6 — D4 — — — CLWB R/W R/W R/W — R/W — — — R/W POR 0 0 — 0 — — — 0 Bit 7FAS: Flash memory access selection 0: Flash program is selected 1: Configuration option is selected Bit 6D6: Reserved, can not be used Bit 5 Unimplemented, read as “0” Bit 4D4: Reserved, can not be used Bit 3~1 Unimplemented, read as “0” Bit 0CLWB: Flash memory Write Buffer Clear control 0: Do not initiate Write Buffer Clear process or Write Buffer Clear process is completed 1: Initiate Write Buffer Clear process This bit is set by software and cleared by hardware when the Write Buffer Clear process is completed. In Application Programming – IAP Offering users the convenience of Flash Memory multi-programming features, the HT66F43x0 series of devices provide not only an ISP function, but also an additional IAP function. The convenience of the IAP function is that it can execute the updated program procedure using its internal firmware, without requiring an external Program Writer or PC. In addition, the IAP interface can also be any type of communication protocol, such as UART or USB, using I/O pins. Designers can assign I/O pins to communicate with the external memory device, including the updated program. Regarding the internal firmware, the user can select versions provided by HOLTEK or create their own. The following section illustrates the procedures regarding how to implement IAP firmware. Flash Memory Write Enable Procedure In order to allow users to change the Flash memory data through the IAP control registers, users must first enable the Flash memory write operation by the following procedure: • Write data “110” to the FMOD [2:0] bits in the FCR register to enable the Flash write control bit, FWEN. • Set the BWT bit in the FCR register to “1”. • These devices will start a 1ms counter. The user should write the correct data pattern into the Flash data registers, namely FD1L~FD3L and FD1H~FD3H, during this period of time. • Once the 1ms counter has overflowed or if the written pattern is incorrect, the enable Flash write control procedure will be invalid and the user should repeat the above procedure. • No matter whether the procedure is valid or not, the devices will clear the BWT bit automatically. Rev. 1.10 36 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • The enable Flash write pattern data is (00H, 04H, 0DH, 09H, C3H, 40H) and it should be written into the Flash data registers. • Once the Flash write operation is enabled, the user can update the Flash memory using the Flash control registers. • To disable the Flash write procedure, the user can only clear the CFWEN bit in the FCR register. There is no need to execute the above procedure. Set FWEN FMOD� ~ 0 = 110 : Set FWEN bit BWT = 1� Hardware set a co�nter Wrtie the followin� pattern to Flash Data re�ister FD1L = 00h� FD1H = 04h FD�L = 0dh� FD�H = 09h FD3L = C3h� FD3H = 40h no Is co�nter overflow? BWT=0? yes Is pattern is Correct ? no yes CFWEN=1 Set FWEN bit s�ccess CFWEN=0 Set FWEN bit fail END Flash Memory Write Enable Procedure Rev. 1.10 37 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Flash Memory Read/Write Procedure Read Flash ROM or Option ROM FMOD�~0=011 FDEN=1 flash address re�ister: F�RH=xxh� F�RL=xxh FRD=1 no FRD=0 ? yes Read val�e: FD0L=xxh� FD0H=xxh no Read Finish ? yes FDEN=0 Clear CFWEN bit END Read Flash Memory or Configuration Option Memory Procedure Rev. 1.10 38 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Write Flash ROM Set FWEN proced�re Pa�e Erase F�RH=xxh� F�RL=xxh FMOD�~0=001 FWT=1 No FWT=0 ? Yes Write FMOD�~0=000 Write data to Write B�ffer (64 Words) Flash address re�ister: F�RH=xxh� F�RL=xxh Write the followin� data to re�ister: FD0L=xxh� FD0H=xxh No Write B�ffer Finish? Write next data Yes FWT=1 No FWT=0 ? Yes Write Finish ? No Write next Pa�e Yes Clear CFWEN bit END Write Flash Memory Procedure Rev. 1.10 39 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Write Option ROM Set FWEN proced�re Set F�S bit Pa�e Erase FMOD�~0=001 FWT=1 No FWT=0 ? Yes Write FMOD�~0=000 Write data to Write B�ffer (00~1Fh) Flash address re�ister: F�RH=xxh� F�RL=xxh Write the followin� data to re�ister: FD0L=xxh� FD0H=xxh No Write B�ffer Finish? Yes FWT=1 No FWT=0 ? Yes Clear F�S bit Clear CFWEN bit END Write Configuration Option Memory Procedure Note: When the FWT or FRD bit is set to 1, the MCU is stopped. Rev. 1.10 40 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Data Memory The Data Memory is an 8-bit wide RAM internal memory and is the location where temporary information is stored. Categorized into two types, the first of Data Memory is an area of RAM where special function registers are located. These registers have fixed locations and are necessary for correct operation of the device. Many of these registers can be read from and written to directly under program control, however, some remain protected from user manipulation. The second area of Data Memory is reserved for general purpose use. All locations within this area are read and write accessible under program control. Switching between the different Data Memory sectors is achieved by properly setting the Memory Pointers to correct value. Structure The Data Memory is subdivided into several sectors, all of which are implemented in 8-bit wide Memory. Each of the Data Memory sectors is categorized into two types, the Special Purpose Data Memory and the General Purpose Data Memory. The address range of the Special Purpose Data Memory for the device is from 00H to 7FH while the General Purpose Data Memory address range is from 80H to FFH. Device HT66F4360 HT66F4370 Special Purpose Data Memory Located Sectors 0, 1 General Purpose Data Memory Capacity Sector: Address 3072 × 8 0: 80H~FFH 1: 80H~FFH : : 22: 80H~FFH 23: 80H~FFH Data Memory Summary Rev. 1.10 41 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU 00H Special Purpose Data Memory (Sector 0 ~ Sector 1) 7FH 80H General Purpose Data Memory (Sector 0 ~ Sector N) FFH Sector 0 Sector 1 Sector N Note: N=23 Data Memory Structure Data Memory Addressing For these devices that support the extended instructions, there is no Bank Pointer for Data Memory. The Bank Pointer, PBP, is only available for Program Memory. For Data Memory the desired Sector is pointed by the MP1H or MP2H register and the certain Data Memory address in the selected sector is specified by the MP1L or MP2L register when using indirect addressing access. Direct Addressing can be used in all sectors using the corresponding instruction which can address all available data memory space. For the accessed data memory which is located in any data memory sectors except sector 0, the extended instructions can be used to access the data memory instead of using the indirect addressing access. The main difference between standard instructions and extended instructions is that the data memory address “m” in the extended instructions can be 13 bits for this series of devices, the high byte indicates a sector and the low byte indicates a specific address. General Purpose Data Memory All microcontroller programs require an area of read/write memory where temporary data can be stored and retrieved for use later. It is this area of RAM memory that is known as General Purpose Data Memory. This area of Data Memory is fully accessible by the user programing for both reading and writing operations. By using the bit operation instructions individual bits can be set or reset under program control giving the user a large range of flexibility for bit manipulation in the Data Memory. Rev. 1.10 42 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Special Purpose Data Memory This area of Data Memory is where registers, necessary for the correct operation of the microcontroller, are stored. Most of the registers are both readable and writeable but some are protected and are readable only, the details of which are located under the relevant Special Function Register section. Note that for locations that are unused, any read instruction to these addresses will return the value “00H”. 00H 01H 0�H 03H 04H 0�H 06H 07H 08H 09H 0�H 0BH 0CH 0DH 0EH 0FH 10H 11H 1�H 13H 14H 1�H 16H 17H 18H 19H 1�H 1BH 1CH 1DH 1EH 1FH Sector 0 I�R0 MP0 I�R1 MP1L MP1H �CC PCL TBLP TBLH TBHP ST�TUS PBP I�R� MP�L MP�H INTC0 INTC1 INTC� INTC3 MFI0 MFI1 MFI� MFI3 INTEG P� P�C P�PU P�WU PB PBC PBPU PC Sector 1 P�S0 P�S1 PBS0 PBS1 PCS0 PCS1 PES0 PES1 �0H �1H ��H �3H �4H ��H �6H �7H �8H �9H ��H �BH �CH �DH �EH �FH 30H 31H 3�H 33H 34H 3�H 36H 37H 38H 39H 3�H 3BH 3CH 3DH 3EH 3FH Sector 0 PCC PCPU PE PEC PEPU SCC HIRCC HXTC LXTC LVDC LVRC WDTC RSTC RSTFC PLLC PSCR TB0C TB1C USB_ST�T UINT USC UESR UCC �WR STLI STLO SIES MISC UFIEN UFOEN UFC0 UFC1 Sector 1 40H 41H 4�H 43H 44H 4�H 46H 47H 48H 49H 4�H 4BH 4CH 4DH 4EH 4FH �0H �1H ��H �3H �4H ��H �6H �7H �8H �9H ��H �BH �CH �DH �EH �FH PF PFC PFPU PFS0 PFS1 IICC0 IICC1 IICD IIC� IICTOC S�DOL S�DOH S�DC0 S�DC1 CMP0C CMP0VOS CMP1C CMP1VOS Sector 0 FIFO0 FIFO1 FIFO� FIFO3 FIFO4 FIFO� FIFO6 FIFO7 F�RL FD0L FD1L FD�L FD3L DC�DC CCR CSR CCCR CETU1 CETU0 CGT1 CGT0 CWT� CWT1 CWT0 CIER CIPR CTXB CRXB STMC0 STMC1 Sector 1 FRCR FCR F�RH FD0H FD1H FD�H FD3H CTM0C0 CTM0C1 60H 61H 6�H 63H 64H 6�H 66H 67H 68H 69H 6�H 6BH 6CH 6DH 6EH 6FH 70H 71H 7�H 73H 74H 7�H 76H 77H 78H 79H 7�H 7BH 7CH 7DH 7EH 7FH Sector 0 STMDL STMDH STM�L STM�H STMRP PTMC0 PTMC1 PTMDL PTMDH PTM�L PTM�H PTMRPL PTMRPH SPI0C0 SPI0C1 SPI0D SPI1C0 SPI1C1 SPI1D U0SR U0CR1 U0CR� TXR_RXR0 BRG0 U1SR U1CR1 U1CR� TXR_RXR1 BRG1 URFC ISOC SYSC Sector 1 CTM0DL CTM0DH CTM0�L CTM0�H CTM1C0 CTM1C1 CTM1DL CTM1DH CTM1�L CTM1�H : Un�sed� read as 00H Speciap Purpose Data Memory Structure – HT66F4360/HT66F4370 Rev. 1.10 43 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Special Function Register Description Most of the Special Function Register details will be described in the relevant functional section. However, several registers require a separate description in this section. Indirect Addressing Registers – IAR0, IAR1, IAR2 The Indirect Addressing Registers, IAR0, IAR1 and IAR2, although having their locations in normal RAM register space, do not actually physically exist as normal registers. The method of indirect addressing for RAM data manipulation uses these Indirect Addressing Registers and Memory Pointers, in contrast to direct memory addressing, where the actual memory address is specified. Actions on the IAR0, IAR1 and IAR2 registers will result in no actual read or write operation to these registers but rather to the memory location specified by their corresponding Memory Pointers, MP0, MP1L/MP1H or MP2L/MP2H. Acting as a pair, IAR0 and MP0 can together access data only from Sector 0 while the IAR1 register together with MP1L/MP1H register pair and IAR2 register together with MP2L/MP2H register pair can access data from any Data Memory sector. As the Indirect Addressing Registers are not physically implemented, reading the Indirect Addressing Registers indirectly will return a result of “00H” and writing to the registers indirectly will result in no operation. Memory Pointers – MP0, MP1H/MP1L, MP2H/MP2L Five Memory Pointers, known as MP0, MP1L, MP1H, MP2L and MP2H, are provided. These Memory Pointers are physically implemented in the Data Memory and can be manipulated in the same way as normal registers providing a convenient way with which to address and track data. When any operation to the relevant Indirect Addressing Registers is carried out, the actual address that the microcontroller is directed to is the address specified by the related Memory Pointer. MP0, together with Indirect Addressing Register, IAR0, are used to access data from Sector 0, while MP1L/MP1H together with IAR1 and MP2L/MP2H together with IAR2 are used to access data from all data sectors according to the corresponding MP1H or MP2H register. Direct Addressing can be used in all data sectors using the corresponding instruction which can address all available data memory space. Indirect Addressing Program Example Example 1 data .section ‘data’ adres1 db ? adres2 db ? adres3 db ? adres4 db ? block db ? code .section at 0 code org 00h start: mov a,04h; movblock,a mov a,offset adres1 ; mov mp0,a ; loop: clr IAR0 ; inc mp0; sdz block ; jmploop continue: : Rev. 1.10 setup size of block Accumulator loaded with first RAM address setup memory pointer with first RAM address clear the data at address defined by MP0 increment memory pointer check if last memory location has been cleared 44 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Example 2 data .section ‘data’ adres1 db ? adres2 db ? adres3 db ? adres4 db ? block db ? code .section at 0 ‘code’ org 00h start: mov a,04h; setup size of block movblock,a mov a,01h; setup the memory sector movmp1h,a mov a,offset adres1 ; Accumulator loaded with first RAM address mov mp1l,a ; setup memory pointer with first RAM address loop: clr IAR1 ; clear the data at address defined by MP1 inc mp1l ; increment memory pointer MP1L sdz block ; check if last memory location has been cleared jmploop continue: : The important point to note here is that in the example shown above, no reference is made to specific RAM addresses. Direct Addressing Program Example using extended instructions data.section ‘data’ tempdb ? code.section at 0 code org00h start: lmov a,[m]; move [m] data to acc lsuba, [m+1] ; compare [m] and [m+1] data snz c; [m]>[m+1]? jmp continue; no lmov a,[m]; yes, exchange [m] and [m+1] data movtemp,a lmova,[m+1] lmov[m],a mova,temp lmov[m+1],a continue: : Note: Here “m” is a data memory address located in any data memory sectors. For example, m=1F0H, it indicates address 0F0H in Sector 1. Program Memory Bank Pointer – PBP For the HT66F43x0 device the Program Memory is divided into several banks. Selecting the required Program Memory area is achieved using the Program Memory Bank Pointer, PBP. The PBP register should be properly configured before the device executes the “Branch” operation using the “JMP” or “CALL” instruction. After that a jump to a non-consecutive Program Memory address which is located in a certain bank selected by the program memory bank pointer bits will occur. Rev. 1.10 45 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU PBP Register – HT66F4360 Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D3 D2 D1 PBP0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~1D7~D1: General data bits and can be read or written Bit 0PBP0: Program Memory Bank Point bit 0 0: Bank 0 1: Bank 1 PBP Register – HT66F4370 Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D3 D2 PBP1 PBP0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~2D7~D2: General data bits and can be read or written Bit 1~0PBP1~PBP0: Program Memory Bank Point bit 1~ bit 0 00: Bank 0 01: Bank 1 10: Bank 2 11: Bank 3 Accumulator – ACC The Accumulator is central to the operation of any microcontroller and is closely related with operations carried out by the ALU. The Accumulator is the place where all intermediate results from the ALU are stored. Without the Accumulator it would be necessary to write the result of each calculation or logical operation such as addition, subtraction, shift, etc., to the Data Memory resulting in higher programming and timing overheads. Data transfer operations usually involve the temporary storage function of the Accumulator; for example, when transferring data between one user defined register and another, it is necessary to do this by passing the data through the Accumulator as no direct transfer between two registers is permitted. Program Counter Low Register – PCL To provide additional program control functions, the low byte of the Program Counter is made accessible to programmers by locating it within the Special Purpose area of the Data Memory. By manipulating this register, direct jumps to other program locations are easily implemented. Loading a value directly into this PCL register will cause a jump to the specified Program Memory location, however, as the register is only 8-bit wide, only jumps within the current Program Memory page are permitted. When such operations are used, note that a dummy cycle will be inserted. Look-up Table Registers – TBLP, TBHP, TBLH These three special function registers are used to control operation of the look-up table which is stored in the Program Memory. TBLP and TBHP are the table pointer and indicates the location where the table data is located. Their value must be setup before any table read commands are executed. Their value can be changed, for example using the “INC” or “DEC” instructions, allowing for easy table data pointing and reading. TBLH is the location where the high order byte of the table data is stored after a table read data instruction has been executed. Note that the lower order table data byte is transferred to a user defined location. Rev. 1.10 46 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Status Register – STATUS This 8-bit register contains the zero flag (Z), carry flag (C), auxiliary carry flag (AC), overflow flag (OV), SC flag, CZ flag, power down flag (PDF), and watchdog time-out flag (TO). These arithmetic/ logical operation and system management flags are used to record the status and operation of the microcontroller. With the exception of the TO and PDF flags, bits in the status register can be altered by instructions like most other registers. Any data written into the status register will not change the TO or PDF flag. In addition, operations related to the status register may give different results due to the different instruction operations. The TO flag can be affected only by a system power-up, a WDT time-out or by executing the “CLR WDT” or “HALT” instruction. The PDF flag is affected only by executing the “HALT” or “CLR WDT” instruction or during a system power-up. The Z, OV, AC, C, SC and CZ flags generally reflect the status of the latest operations. • C is set if an operation results in a carry during an addition operation or if a borrow does not take place during a subtraction operation; otherwise C is cleared. C is also affected by a rotate through carry instruction. • AC is set if an operation results in a carry out of the low nibbles in addition, or no borrow from the high nibble into the low nibble in subtraction; otherwise AC is cleared. • Z is set if the result of an arithmetic or logical operation is zero; otherwise Z is cleared. • OV is set if an operation results in a carry into the highest-order bit but not a carry out of the highest-order bit, or vice versa; otherwise OV is cleared. • PDF is cleared by a system power-up or executing the “CLR WDT” instruction. PDF is set by executing the “HALT” instruction. • TO is cleared by a system power-up or executing the “CLR WDT” or “HALT” instruction. TO is set by a WDT time-out. • SC is the result of the “XOR” operation which is performed by the OV flag and the MSB of the current instruction operation result. • CZ is the operational result of different flags for different instuctions. Refer to register definitions for more details. In addition, on entering an interrupt sequence or executing a subroutine call, the status register will not be pushed onto the stack automatically. If the contents of the status registers are important and if the subroutine can corrupt the status register, precautions must be taken to correctly save it. Rev. 1.10 47 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU STATUS Register Bit 7 6 5 4 3 2 1 0 Name SC CZ TO PDF OV Z AC C R/W R R R R R/W R/W R/W R/W POR x x 0 0 x x x x “x”: unknown Bit 7SC: The result of the “XOR” operation which is performed by the OV flag and the MSB of the instruction operation result. Bit 6CZ: The the operational result of different flags for different instuctions. For SUB/SUBM/LSUB/LSUBM instructions, the CZ flag is equal to the Z flag. For SBC/ SBCM/ LSBC/ LSBCM instructions, the CZ flag is the “AND” operation result which is performed by the previous operation CZ flag and current operation zero flag. For other instructions, the CZ flag willl not be affected. Bit 5TO: Watchdog Time-out flag 0: After power up ow executing the “CLR WDT” or “HALT” instruction 1: A watchdog time-out occurred Bit 4PDF: Power down flag 0: After power up ow executing the “CLR WDT” instruction 1: By executing the “HALT” instructin Bit 3OV: Overflow flag 0: No overflow 1: An operation results in a carry into the highest-order bit but not a carry out of the highest-order bit or vice versa Bit 2Z: Zero flag 0: The result of an arithmetic or logical operation is not zero 1: The result of an arithmetic or logical operation is zero Bit 1AC: Auxiliary flag 0: No auxiliary carry 1: An operation results in a carry out of the low nibbles, in addition, or no borrow from the high nibble into the low nibble in substraction Bit 0C: Carry flag 0: No carry-out 1: An operation results in a carry during an addition operation or if a borrow does not take place during a subtraction operation The “C” flag is also affected by a rotate through carry instruction. Rev. 1.10 48 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Oscillators Various oscillator types offer the user a wide range of functions according to their various application requirements. The flexible features of the oscillator functions ensure that the best optimisation can be achieved in terms of speed and power saving. Oscillator selections and operation are selected through a combination of configuration options and relevant control registers. Oscillator Overview In addition to being the source of the main system clock the oscillators also provide clock sources for the Watchdog Timer and Time Base Interrupts. External oscillators requiring some external components as well as fully integrated internal oscillators, requiring no external components, are provided to form a wide range of both fast and slow system oscillators. All oscillator options are selected through configuration options and relevant control registers. The higher frequency oscillators provide higher performance but carry with it the disadvantage of higher power requirements, while the opposite is of course true for the lower frequency oscillators. With the capability of dynamically switching between fast and slow system clock, the device has the flexibility to optimize the performance/power ratio, a feature especially important in power sensitive portable applications. For USB applications, the HXT pins must be connected to a 6MHz or 12MHz crystal if the HXT oscillator is selected to be used. Name Frequency Pins External High Speed Crystal Type HXT 6 MHz or 12 MHz OSC1/OSC2 Internal High Speed RC HIRC 12 MHz — External Low Speed Crystal LXT 32.768 kHz XT1/XT2 Internal Low Speed RC LIRC 32 kHz — Oscillator Types System Clock Configurations There are four methods of generating the system clock, two high speed oscillators for all devices and two low speed oscillators. The high speed oscillator is the external crystal/ceramic oscillator, HXT, and the internal 12 MHz RC oscillator, HIRC. The two low speed oscillators are the internal 32 kHz RC oscillator, LIRC, and the external 32.768 kHz crystal oscillator, LXT. Selecting whether the low or high speed oscillator is used as the system oscillator is implemented using the CKS2~CKS0 bits in the SCC register and as the system clock can be dynamically selected. The actual source clock used for the low speed oscillators is chosen via the FSS bit in the SCC register while for the high speed oscillator the source clock is selected by the FHS bit in the SCC register together with a configuration option. The frequency of the slow speed or high speed system clock is determined using the CKS2~CKS0 bits in the SCC register. Note that two oscillator selections must be made namely one high speed and one low speed system oscillators. It is not possible to choose a no-oscillator selection for either the high or low speed oscillator. Rev. 1.10 49 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU To USB circ�its Confi�.Option Selects 6/1�MHz XT�L 48MHz HXT OSC HXTEN HOSC 16MHz HOSC HIRC OSC HIRCEN USBCKEN PLL fH Prescaler PLL clock 1�MHz 6MHz fSYS fSUB PLL Hi�h speed Oscillator fH fH/� fH/4 fH/8 fH/16 fH/3� fH/64 FSYS16MHZ FHS SYSCLK PLL CKS�~CKS0 LIRC OSC SYSCLK LXTEN fSUB LXT OSC Low speed Oscillator FSS System Clock Configurations External Crystal/Ceramic Oscillator – HXT The External Crystal/Ceramic System Oscillator is one of the high frequency oscillators. For most crystal oscillator configurations, the simple connection of a crystal across OSC1 and OSC2 will create the necessary phase shift and feedback for oscillation, without requiring external capacitors. However, for some crystal types and frequencies, to ensure oscillation, it may be necessary to add two small value capacitors, C1 and C2. Using a ceramic resonator will usually require two small value capacitors, C1 and C2, to be connected as shown for oscillation to occur. The values of C1 and C2 should be selected in consultation with the crystal or resonator manufacturer’s specification. For USB applications, the HXT pins must be connected to a 6MHz or 12MHz crystal if the HXT oscillator is selected to be used. For oscillator stability and to minimise the effects of noise and crosstalk, it is important to ensure that the crystal and any associated resistors and capacitors along with interconnecting lines are all located as close to the MCU as possible. Crystal/Resonator Oscillator Rev. 1.10 50 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU HXT Oscillator C1 and C2 Values Crystal Frequency C1 C2 12MHz 0 pF 0 pF 8MHz 0 pF 0 pF 4MHz 0 pF 0 pF 1MHz 100 pF 100 pF Note: C1 and C2 values are for guidance only. Crystal Recommended Capacitor Values Internal PLL Frequency Generator The internal PLL frequency generator is used to generate the frequency for the USB interface and the system clock. This PLL generator can be enabled or disabled by the PLL control bit in the USC register. After a power on reset, the PLL control bit will be set to “0” to turn on the PLL generator. The PLL generator will provide the fixed 48MHz frequency for the USB operating frequency and another frequency for the system clock source which can be 6MHz, 12MHz or 16MHz. The selection of this system frequency is implemented using the SYSCLK, FSYS16MHZ and USBCKEN bits in the UCC register. In addition, the system clock can be selected as the HXT via these control bits. The CLK_ADJ bit is used to adjust the PLL clock automatically. The following table illustrates the PLL output frequency selected by the related control bits. PLL USBCKEN FSYS16MHZ fH 0 0 0 0 0 1 fPLL=16MHz HOSC – HXT or HIRC 0 1 0 fPLL=6MHz or 12MHz, depending upon the “SYSCLK” bit in the UCC register. 0 1 1 fPLL=16MHz 1 x x HOSC – HXT or HIRC “x”: don’t care SYSC Register Bit Name 7 6 CLK_ADJ USBDIS 5 4 3 2 1 0 RUBUS D4 D3 D2 IOVC1 IOVC0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7CLK_ADJ: PLL clock automatic adjustment function control 0: Disable 1: Enable Note that if the user selects the HIRC as the system clock, the CLK_ADJ bit must be set to 1 to adjust the PLL frequency automatically. Bit 6USBDIS: USB engine SIE control Discribed elsewhere. Bit 5RUBUS: UBUS pin pull low function control Discribed elsewhere. Bit 4~2D4~D2: Reserved data bits, should be kept low and cannot be modified. Bit 1~0IOVC1~IOVC0: Port A and Port B pins supply power select Discribed elsewhere. Rev. 1.10 51 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU UCC Register Bit Name 7 6 5 RCTRL SYSCLK FSYS16MHZ 4 3 2 1 0 SUSP2 USBCKEN EPS2 EPS1 EPS0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7RCTRL: 7.5kΩ resistor between UDP and UBUS connection control Discribed elsewhere. Bit 6SYSCLK: System clock frequency select 0: 12MHz 1: 6MHz This bit is used to specify the system clock oscillator used by the MCU. If a 6MHz crystal or resonator is used for the device, this bit should be set to 1. If a 12MHz crystal or resonator is used, then this bit should be set to 0. If the 12MHz HIRC is selected, then this bit must be set to 0. Bit 5FSYS16MHZ: System clock frequency select 0: System clock comes from HXT or HIRC 1: System clock comes from PLL output – 16MHz Bit 4SUSP2: Suspend mode power consumption reduction control Discribed elsewhere. Bit 3USBCKEN: USB clock enable control 0: Disable 1: Enable Bit 2~0EPS2~EPS0: Endpoint FIFO access selection Discribed elsewhere. USC Register Bit 7 6 5 4 3 Name URD SELPS2 PLL R/W R/W R/W R/W R/W R POR 1 0 0 0 0 SELUSB RESUME 2 1 0 URST RMWK SUSP R/W R/W R 0 0 0 Bit 7URD: USB reset signal control Discribed elsewhere. Bit 6SELPS2: PS2 mode selection Discribed elsewhere. Bit 5PLL: PLL circuit enable control 0: Enable the PLL 1: Disable the PLL Bit 4SELUSB: USB analog function and V33O enable control Discribed elsewhere. Bit 3RESUME: USB Resume indication Discribed elsewhere. Bit 2URST: USB Reset indication Discribed elsewhere. Bit 1RMWK: USB Remote wake-up control Discribed elsewhere. Bit 0SUSP: USB Suspend mode indication Discribed elsewhere. Rev. 1.10 52 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Internal High Speed RC Oscillator – HIRC The internal RC oscillator is a fully integrated system oscillator requiring no external components. The internal RC oscillator has a fixed frequency of 12MHz. Device trimming during the manufacturing process and the inclusion of internal frequency compensation circuits are used to ensure that the influence of the power supply voltage, temperature and process variations on the oscillation frequency are minimised. As a result, at a power supply of 3.3V or 5V and at a temperature of 25°C degrees, the fixed oscillation frequency of 12MHz will have a tolerance within 3% for non-USB mode. Note that if this internal system clock option is selected, as it requires no external pins for its operation, I/O pins are free for use as normal I/O or other pin-shared pins. The HIRC oscillator has its own power supply pin, HVDD. The HVDD pin must be connected to VDD pin and a 0.1μF capacitor to ground. External 32.768kHz Crystal Oscillator – LXT The External 32.768 kHz Crystal System Oscillator is one of the low frequency oscillator choices, which is selected via a software control bit, FSS. This clock source has a fixed frequency of 32.768kHz and requires a 32.768kHz crystal to be connected between pins XT1 and XT2. The external resistor and capacitor components connected to the 32.768kHz crystal are necessary to provide oscillation. For applications where precise frequencies are essential, these components may be required to provide frequency compensation due to different crystal manufacturing tolerances. After the LXT oscillator is enabled by setting the LXTEN bit to 1, there is a time delay associated with the LXT oscillator waiting for it to start-up. However, for some crystals, to ensure oscillation and accurate frequency generation, it is necessary to add two small value external capacitors, C1 and C2. The exact values of C1 and C2 should be selected in consultation with the crystal or resonator manufacturer’s specification. The external parallel feedback resistor, Rp, is required. For oscillator stability and to minimise the effects of noise and crosstalk, it is important to ensure that the crystal and any associated resistors and capacitors along with interconnecting lines are all located as close to the MCU as possible. External LXT Oscillator Internal 32kHz Oscillator – LIRC The Internal 32 kHz System Oscillator is one of the low frequency oscillator choices, which is selected via a software control bit, FSS. It is a fully integrated RC oscillator with a typical frequency of 32 kHz at 5V, requiring no external components for its implementation. Device trimming during the manufacturing process and the inclusion of internal frequency compensation circuits are used to ensure that the influence of the power supply voltage, temperature and process variations on the oscillation frequency are minimised. As a result, at a power supply of 5V and at a temperature of 25˚C degrees, the fixed oscillation frequency of 32 kHz will have a tolerance within 10%. Rev. 1.10 53 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Operating Modes and System Clocks Present day applications require that their microcontrollers have high performance but often still demand that they consume as little power as possible, conflicting requirements that are especially true in battery powered portable applications. The fast clocks required for high performance will by their nature increase current consumption and of course, vice-versa, lower speed clocks reduce current consumption. As Holtek has provided these devices with both high and low speed clock sources and the means to switch between them dynamically, the user can optimise the operation of their microcontroller to achieve the best performance/power ratio. System Clocks Each device has different clock sources for both the CPU and peripheral function operation. By providing the user with a wide range of clock selections using register programming, a clock system can be configured to obtain maximum application performance. The main system clock, can come from either a high frequency, fH, or low frequency, fSUB, source, and is selected using the CKS2~CKS0 bits in the SCC register. The high speed system clock is sourced from an HXT or HIRC oscillator or the USB PLL output clock, selected via configuring the FHS bit in the SCC register together with the PLL, USBCKEN and FSYS16MHZ control bits. The low speed system clock source can be sourced from the internal clock fSUB. If fSUB is selected then it can be sourced by either the LXT or LIRC oscillators, selected via configuring the FSS bit in the SCC register. The other choice, which is a divided version of the high speed system oscillator has a range of fH/2~fH/64. fSYS To U�RTn Circ�its URnFC[�:0] Confi�.Option Selects 6/1�MHz XT�L 48MHz HIRCEN HOSC HIRC Hi�h speed Oscillator To USB Circ�its USBCKEN PLL fH/4 HOSC Prescaler fH/8 fH/16 fSYS fH/3� PLL clock 1�MHz fH/64 fSUB FSYS16MHZ FHS PLL fH/� fH 6MHz SYSCLK fH PLL 16MHz HXT HXTEN CKS�~CKS0 fSUB SYSCLK fWDT TB0[�:0] LIRC LXTEN TB0ON fSUB fSYS/4 LXT Low speed Oscillator WDT fPSC fSYS Prescaler TB1ON FSS CLKSEL0[1:0] Time Base 0 Time Base 1 TB1[�:0] Device Clock Configurations Note: When the system clock source fSYS is switched to fSUB from fH, the high speed oscillation can be stopped to conserve the power or continue to oscillate to provide the clock source, fH~fH/64, for peripheral circuit to use, which is determined by configuring the corresponding high speed oscillator enable control bit. Rev. 1.10 54 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU System Operation Modes There are six different modes of operation for the microcontroller, each one with its own special characteristics and which can be chosen according to the specific performance and power requirements of the application. There are two modes allowing normal operation of the microcontroller, the NORMAL Mode and SLOW Mode. The remaining four modes, the SLEEP, IDLE0, IDLE1 and IDLE2 Mode are used when the microcontroller CPU is switched off to conserve power. Register Setting Operation CPU Mode FHIDEN FSIDEN CKS2~CKS0 NORMAL On x x SLOW On x x IDLE0 Off 0 1 IDLE1 Off 1 1 IDLE2 Off 1 0 SLEEP Off 0 0 000~110 111 fSYS fH fH~fH/64 On fSUB 000~110 Off 111 On xxx On 000~110 On 111 Off xxx Off fSUB fWDT fPLL On On On On On Off On On Off On On On On On Off On/Off (2) On Off Off On/Off (2) Off On/Off (1) On/Off (3) “x”: Don’t care Note: 1. The fH clock will be switched on or off by configuring the corresponding oscillator enable bit in the SLOW mode. 2. The fWDT clock can be switched on or off which is controlled by the WDT function being enabled or disabled. 3. The fPLL clock can be switched on or off which is controlled by the PLL bit in the USC register in any operating modes. 4. The USB function is inactive in IDLE0 and SLEEP mode. NORMAL Mode As the name suggests this is one of the main operating modes where the microcontroller has all of its functions operational and where the system clock is provided by one of the high speed oscillators. This mode operates allowing the microcontroller to operate normally with a clock source will come from one of the high speed oscillators, either the HXT or HIRC oscillators. The high speed oscillator will however first be divided by a ratio ranging from 1 to 64, the actual ratio being selected by the CKS2~CKS0 bits in the SCC register.Although a high speed oscillator is used, running the microcontroller at a divided clock ratio reduces the operating current. In the USB mode, the PLL circuit of which the clock source can be derived from the HXT or HIRC oscillator can generate a clock with a frequency of 6MHz, 12MHz or 16MHz as the device system clock. SLOW Mode This is also a mode where the microcontroller operates normally although now with a slower speed clock source. The clock source used will be from fSUB. The fSUB clock is derived from either the LIRC or LXT oscillator determined by the FSS bit in the SCC register. SLEEP Mode The SLEEP Mode is entered when an HALT instruction is executed and when the FHIDEN and FSIDEN bit are low. In the SLEEP mode the CPU will be stopped. The fSUB clock provided to the peripheral function will also be stopped, too. However the fWDT clock can continues to operate if the WDT function is always enabled. Rev. 1.10 55 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU IDLE0 Mode The IDLE0 Mode is entered when an HALT instruction is executed and when the FHIDEN bit in the SCC register is low and the FSIDEN bit in the SCC register is high. In the IDLE0 Mode the CPU will be switched off but the low speed oscillator will be turned on to drive some peripheral functions. IDLE1 Mode The IDLE1 Mode is entered when an HALT instruction is executed and when the FHIDEN bit in the SCC register is high and the FSIDEN bit in the SCC register is high. In the IDLE1 Mode the CPU will be switched off but both the high and low speed oscillators will be turned on to provide a clock source to keep some peripheral functions operational. IDLE2 Mode The IDLE2 Mode is entered when an HALT instruction is executed and when the FHIDEN bit in the SCC register is high and the FSIDEN bit in the SCC register is low. In the IDLE2 Mode the CPU will be switched off but the high speed oscillator will be turned on to provide a clock source to keep some peripheral functions operational. Control Registers The registers, SCC, HIRCC, HXTC and LXTC, are used to control the system clock and the corresponding oscillator configurations. Bit Register Name 7 6 5 4 3 2 1 0 SCC CKS2 CKS1 CKS0 — FHS FSS FHIDEN FSIDEN HIRCC — — — — — — HIRCF HIRCEN HXTC — — — — — HXTM HXTF HXTEN LXTC — — — — — — LXTF LXTEN System Operating Mode Control Registers List SCC Register Bit 7 6 5 4 3 2 1 0 Name CKS2 CKS1 CKS0 — FHS FSS FHIDEN FSIDEN R/W R/W R/W R/W — R/W R/W R/W R/W POR 0 0 0 — 0 0 0 0 Bit 7~5CKS2~CKS0: System clock selection 000: fH 001: fH/2 010: fH/4 011: fH/8 100: fH/16 101: fH/32 110: fH/64 111: fSUB These three bits are used to select which clock is used as the system clock source. In addition to the system clock source directly derived from fH or fSUB, a divided version of the high speed system oscillator can also be chosen as the system clock source. Bit 4 Unimplemented, read as “0” Bit 3FHS: High Frequency clock selection 0: HIRC 1: HXT Rev. 1.10 56 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 2FSS: Low Frequency clock selection 0: LIRC 1: LXT Bit 1FHIDEN: High Frequency oscillator control when CPU is switched off 0: Disable 1: Enable This bit is used to control whether the high speed oscillator is activated or stopped when the CPU is switched off by executing an “HALT” instruction. Bit 0FSIDEN: Low Frequency oscillator control when CPU is switched off 0: Disable 1: Enable This bit is used to control whether the low speed oscillator is activated or stopped when the CPU is switched off by executing an “HALT” instruction. The low frequency oscillator is controlled by this bit together with the WDT function enable control. If this bit is cleared to 0 but the WDT function is enabled, the fWDT clock will also be enabled. HIRCC Register Bit 7 6 5 4 3 2 1 0 Name — — — — — — HIRCF HIRCEN R/W — — — — — — R R/W POR — — — — — — 0 1 Bit 7~2 Unimplemented, read as “0” Bit 1HIRCF: HIRC oscillator stable flag 0: HIRC unstable 1: HIRC stable This bit is used to indicate whether the HIRC oscillator is stable or not. When the HIRCEN bit is set to 1 to enable the HIRC oscillator, the HIRCF bit will first be cleared to 0 and then set to 1 after the HIRC oscillator is stable. Bit 0HIRCEN: HIRC oscillator enable control 0: Disable 1: Enable Rev. 1.10 57 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU HXTC Register Bit 7 6 5 4 3 2 1 0 Name — — — — — HXTM HXTF HXTEN R/W — — — — — R/W R R/W POR — — — — — 0 0 0 Bit 7~3 Unimplemented, read as “0” Bit 2HXTM: HXT mode selection 0: HXT frequency ≤ 10 MHz 1: HXT frequency > 10 MHz This bit is used to select the HXT oscillator operating mode. Note that this bit must be properly configured before the HXT is enabled. When the HXTEN bit is set to 1 to enable the HXT oscillator, it is invalid to change the value of this bit. Bit 1HXTF: HXT oscillator stable flag 0: HXT unstable 1: HXT stable This bit is used to indicate whether the HXT oscillator is stable or not. When the HXTEN bit is set to 1 to enable the HXT oscillator, the HXTF bit will first be cleared to 0 and then set to 1 after the HXT oscillator is stable. Bit 0HXTEN: HXT oscillator enable control 0: Disable 1: Enable LXTC Register Bit 7 6 5 4 3 2 1 0 Name — — — — — — LXTF LXTEN R/W — — — — — — R R/W POR — — — — — — 0 0 Bit 7~2 Unimplemented, read as “0” Bit 1LXTF: LXT oscillator stable flag 0: LXT unstable 1: LXT stable This bit is used to indicate whether the LXT oscillator is stable or not. When the LXTEN bit is set to 1 to enable the LXT oscillator, the LXTF bit will first be cleared to 0 and then set to 1 after the LXT oscillator is stable. Bit 0LXTEN: LXT oscillator enable control 0: Disable 1: Enable Rev. 1.10 58 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Operating Mode Switching These devices can switch between operating modes dynamically allowing the user to select the best performance/power ratio for the present task in hand. In this way microcontroller operations that do not require high performance can be executed using slower clocks thus requiring less operating current and prolonging battery life in portable applications. In simple terms, Mode Switching between the NORMAL Mode and SLOW Mode is executed using the CKS2~CKS0 bits in the SCC register while Mode Switching from the NORMAL/SLOW Modes to the SLEEP/IDLE Modes is executed via the HALT instruction. When an HALT instruction is executed, whether the device enters the IDLE Mode or the SLEEP Mode is determined by the condition of the FHIDEN and FSIDEN bits in the SCC register. NORMAL fSYS=fH~fH/64 fH on CPU run fSYS on fSUB on SLOW fSYS=fSUB fSUB on CPU run fSYS on fH on/off SLEEP HALT instruction executed CPU stop FHIDEN=0 FSIDEN=0 fH off fSUB off IDLE0 HALT instruction executed CPU stop FHIDEN=0 FSIDEN=1 fH off fSUB on IDLE2 HALT instruction executed CPU stop FHIDEN=1 FSIDEN=0 fH on fSUB off Rev. 1.10 59 IDLE1 HALT instruction executed CPU stop FHIDEN=1 FSIDEN=1 fH on fSUB on August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU NORMAL Mode to SLOW Mode Switching When running in the NORMAL Mode, which uses the high speed system oscillator, and therefore consumes more power, the system clock can switch to run in the SLOW Mode by set the CKS2~CKS0 bits to “111” in the SCC register. This will then use the low speed system oscillator which will consume less power. Users may decide to do this for certain operations which do not require high performance and can subsequently reduce power consumption. The SLOW Mode is sourced from the LXT or LIRC oscillator determined by the FSS bit in the SCC register and therefore requires this oscillator to be stable before full mode switching occurs. NORMAL Mode CKS2~CKS0 = 111 SLOW Mode FHIDEN=0, FSIDEN=0 HALT instruction is executed SLEEP Mode FHIDEN=0, FSIDEN=1 HALT instruction is executed IDLE0 Mode FHIDEN=1, FSIDEN=1 HALT instruction is executed IDLE1 Mode FHIDEN=1, FSIDEN=0 HALT instruction is executed IDLE2 Mode Rev. 1.10 60 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU SLOW Mode to NORMAL Mode Switching In SLOW mode the system clock is derived from fSUB. When system clock is switched back to the NORMAL mode from fSUB, the CKS2~CKS0 bits should be set to “000” ~“110” and then the system clock will respectively be switched to fH~ fH/64. However, if fH is not used in SLOW mode and thus switched off, it will take some time to reoscillate and stabilise when switching to the NORMAL mode from the SLOW Mode. This is monitored using the HXTF bit in the HXTC register or the HIRCF bit in the HIRCC register. The time duration required for the high speed system oscillator stabilization is specified in the A.C. characteristics. SLOW Mode CKS2~CKS0 = 000~110 NORMAL Mode FHIDEN=0, FSIDEN=0 HALT instruction is executed SLEEP Mode FHIDEN=0, FSIDEN=1 HALT instruction is executed IDLE0 Mode FHIDEN=1, FSIDEN=1 HALT instruction is executed IDLE1 Mode FHIDEN=1, FSIDEN=0 HALT instruction is executed IDLE2 Mode Entering the SLEEP Mode There is only one way for the device to enter the SLEEP Mode and that is to execute the “HALT” instruction in the application program with both the FHIDEN and FSIDEN bits in the SCC register equal to “0”. In this mode all the clocks and functions will be switched off except the WDT function. When this instruction is executed under the conditions described above, the following will occur: • The system clock will be stopped and the application program will stop at the "HALT" instruction. • The Data Memory contents and registers will maintain their present condition. • The I/O ports will maintain their present conditions. • In the status register, the Power Down flag PDF will be set, and WDT timeout flag TO will be cleared. • The WDT will be cleared and resume counting if the WDT function is enabled. If the WDT function is disabled, the WDT will be cleared and then stopped. • The USB will enter the suspend mode if the USB function is enabled. Rev. 1.10 61 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Entering the IDLE0 Mode There is only one way for the device to enter the IDLE0 Mode and that is to execute the “HALT” instruction in the application program with the FHIDEN bit in the SCC register equal to “0” and the FSIDEN bit in the SCC register equal to “1”. When this instruction is executed under the conditions described above, the following will occur: • The fH clock will be stopped and the application program will stop at the “HALT” instruction, but the fSUB clock will be on. • The Data Memory contents and registers will maintain their present condition. • The I/O ports will maintain their present conditions. • In the status register, the Power Down flag PDF will be set, and WDT timeout flag TO will be cleared. • The WDT will be cleared and resume counting if the WDT function is enabled. If the WDT function is disabled, the WDT will be cleared and then stopped. • The USB will enter the suspend mode if the USB function is enabled. Entering the IDLE1 Mode There is only one way for the device to enter the IDLE1 Mode and that is to execute the “HALT” instruction in the application program with both the FHIDEN and FSIDEN bits in the SCC register equal to “1”. When this instruction is executed under the conditions described above, the following will occur: • The fH and fSUB clocks will be on but the application program will stop at the “HALT” instruction. • The Data Memory contents and registers will maintain their present condition. • The I/O ports will maintain their present conditions. • In the status register, the Power Down flag PDF will be set, and WDT timeout flag TO will be cleared. • The WDT will be cleared and resume counting if the WDT function is enabled. If the WDT function is disabled, the WDT will be cleared and then stopped. • The USB will enter the suspend mode if the USB function is enabled. Entering the IDLE2 Mode There is only one way for the device to enter the IDLE2 Mode and that is to execute the “HALT” instruction in the application program with the FHIDEN bit in the SCC register equal to “1” and the FSIDEN bit in the SCC register equal to “0”. When this instruction is executed under the conditions described above, the following will occur: • The fH clock will be on but the fSUB clock will be off and the application program will stop at the “HALT” instruction. • The Data Memory contents and registers will maintain their present condition. • The I/O ports will maintain their present conditions. • In the status register, the Power Down flag PDF will be set, and WDT timeout flag TO will be cleared. • The WDT will be cleared and resume counting if the WDT function is enabled. If the WDT function is disabled, the WDT will be cleared and then stopped. • The USB will enter the suspend mode if the USB function is enabled. Rev. 1.10 62 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Standby Current Considerations As the main reason for entering the SLEEP or IDLE Mode is to keep the current consumption of the device to as low a value as possible, perhaps only in the order of several micro-amps except in the IDLE1 and IDLE2 Mode, there are other considerations which must also be taken into account by the circuit designer if the power consumption is to be minimised. Special attention must be made to the I/O pins on the device. All high-impedance input pins must be connected to either a fixed high or low level as any floating input pins could create internal oscillations and result in increased current consumption. This also applies to devices which have different package types, as there may be unbonbed pins. These must either be setup as outputs or if setup as inputs must have pull-high resistors connected. Care must also be taken with the loads, which are connected to I/O pins, which are setup as outputs. These should be placed in a condition in which minimum current is drawn or connected only to external circuits that do not draw current, such as other CMOS inputs. Also note that additional standby current will also be required if the LIRC oscillator has enabled. In the IDLE1 and IDLE 2 Mode the high speed oscillator is on, if the peripheral function clock source is derived from the high speed oscillator, the additional standby current will also be perhaps in the order of several hundred micro-amps. Wake-up To minimise power consumption the device can enter the SLEEP or any IDLE Mode, where the CPU will be switched off. However, when the device is woken up again, it will take a considerable time for the original system oscillator to restart, stablise and allow normal operation to resume. After the system enters the SLEEP or IDLE Mode, it can be woken up from one of various sources listed as follows: • An external pin reset • An USB reset signal reset • An external falling edge on Port A • A system interrupt • A WDT overflow If the system is woken up by an external or USB reset, these devices will experience a full system reset, however, if these devices are woken up by a WDT overflow, a Watchdog Timer reset will be initiated. Although both of these wake-up methods will initiate a reset operation, the actual source of the wake-up can be determined by examining the TO and PDF flags. The PDF flag is cleared by a system power-up or executing the clear Watchdog Timer instructions and is set when executing the “HALT” instruction. The TO flag is set if a WDT time-out occurs, and causes a wake-up that only resets the Program Counter and Stack Pointer, the other flags remain in their original status. Each pin on Port A can be setup using the PAWU register to permit a negative transition on the pin to wake up the system. When a Port A pin wake-up occurs, the program will resume execution at the instruction following the “HALT” instruction. If the system is woken up by an interrupt, then two possible situations may occur. The first is where the related interrupt is disabled or the interrupt is enabled but the stack is full, in which case the program will resume execution at the instruction following the “HALT” instruction. In this situation, the interrupt which woke up the device will not be immediately serviced, but wukk rather be serviced later when the related interrupt is finally enabled or when a stack level becomes free. The other situation is where the related interrupt is enabled and the stack is not full, in which case the regular interrupt response takes place. If an interrupt request flag is set high before entering the SLEEP or IDLE Mode, the wake-up function of the related interrupt will be disabled. Rev. 1.10 63 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Watchdog Timer The Watchdog Timer is provided to prevent program malfunctions or sequences from jumping to unknown locations, due to certain uncontrollable external events such as electrical noise. Watchdog Timer Clock Source The Watchdog Timer clock source is provided by the internal clock, fWDT, which can be sourced form either the LXT or LIRC oscillator determined by the FSS bit in the SCC register. The LIRC internal oscillator has an approximate frequency of 32 kHz and this specified internal clock period can vary with VDD, temperature and process variations. The LXT oscillator is supplied by an external 32.768kHz crystal. The Watchdog Timer source clock is then subdivided by a ratio of 28 to 218 to give longer timeouts, the actual value being chosen using the WS2~WS0 bits in the WDTC register. Watchdog Timer Control Register A single register, WDTC, controls the required timeout period as well as the enable/disable operation. This register controls the overall operation of the Watchdog Timer. WDTC Register Bit 7 6 5 4 3 2 1 0 Name WE4 WE3 WE2 WE1 WE0 WS2 WS1 WS0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 1 0 1 0 0 1 1 Bit 7~3WE4~WE0: WDT function enable control 10101: Disable 01010: Enabled Other values: Reset MCU If these bits are changed due to adverse environmental conditions, the microcontroller will be reset. The reset operation will be activated after 2~3 fLIRC clock cycles and the WRF bit in the RSTFC register will be set to 1. Bit 2~0WS2~WS0: WDT time-out period selection 000: 28/fWDT 001: 210/fWDT 010: 212/fWDT 011: 214/fWDT 100: 215/fWDT 101: 216/fWDT 110: 217/fWDT 111: 218/fWDT These three bits determine the division ratio of the watchdog timer source clock, which in turn determines the time-out period. Rev. 1.10 64 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU RSTFC Register Bit 7 6 5 4 3 2 1 0 Name — — — — RSTF LVRF LRF WRF R/W R/W — — — — R/W R/W R/W POR — — — — 0 x 0 0 “x”: unknown Bit 7~4 Unimplemented, read as “0” Bit 3RSTF: Reset control register software reset flag Described elsewhere. Bit 2LVRF: LVR function reset flag Described elsewhere. Bit 1LRF: LVR control register software reset flag Described elsewhere. Bit 0WRF: WDT control register software reset flag 0: Not occurred 1: Occurred This bit is set to 1 by the WDT control register software reset and cleared by the application program. Note that this bit can only be cleared to 0 by the application program. Watchdog Timer Operation The Watchdog Timer operates by providing a device reset when its timer overflows. This means that in the application program and during normal operation the user has to strategically clear the Watchdog Timer before it overflows to prevent the Watchdog Timer from executing a reset. This is done using the clear watchdog instruction. If the program malfunctions for whatever reason, jumps to an unknown location, or enters an endless loop, the clear instruction will not be executed in the correct manner, in which case the Watchdog Timer will overflow and reset the device. With regard to the Watchdog Timer enable/disable function, there are five bits, WE4~WE0, in the WDTC register to offer the enable/disable control and reset control of the Watchdog Timer. If the WE4~WE0 bits are set to a value of 10101B, the WDT function will be disabled. The WDT function will be enabled when the WE4~WE0 bits are set to a value of 01010B. If the WE4~WE0 bits are set to any other values other than 01010B and 10101B, it will reset the device after 2~3 fLIRC clock cycles. After power on these bits will have a value of 01010B. WE4 ~ WE0 Bits WDT Function 10101B Disable 01010B Enable Any other value Reset MCU Watchdog Timer Enable/Disable Control Under normal program operation, a Watchdog Timer time-out will initialise a device reset and set the status bit TO. However, if the system is in the SLEEP or IDLE Mode, when a Watchdog Timer time-out occurs, the TO bit in the status register will be set and only the Program Counter and Stack Pointer will be reset. Three methods can be adopted to clear the contents of the Watchdog Timer. The first is a WDT reset, which means a certain value except 01010B and 10101B written into the WE4~WE0 field, the second is using the Watchdog Timer software clear instruction and the third is via a HALT instruction. There is only one method of using software instruction to clear the Watchdog Timer. That is to use the single “CLR WDT” instruction to clear the WDT contents. Rev. 1.10 65 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU The maximum time out period is when the 218 division ratio is selected. As an example, with a 32kHz LIRC oscillator as its source clock, this will give a maximum watchdog period of around 8 second for the 218 division ratio and a minimum timeout of 7.8ms for the 28 division ration. WDTC Register WE4~WE0 bits Reset MCU CLR “HALT”Instruction “CLR WDT”Instruction fWDT 8-stage Divider fWDT/28 WS2~WS0 WDT Prescaler 8-to-1 MUX (fWDT/28 ~ fWDT/218) WDT Time-out (28/fWDT ~ 218/fWDT) Watchdog timer Reset and Initialisation A reset function is a fundamental part of any microcontroller ensuring that the device can be set to some predetermined condition irrespective of outside parameters. The most important reset condition is after power is first applied to the microcontroller. In this case, internal circuitry will ensure that the microcontroller, after a short delay, will be in a well defined state and ready to execute the first program instruction. After this power-on reset, certain important internal registers will be set to defined states before the program commences. One of these registers is the Program Counter, which will be reset to zero forcing the microcontroller to begin program execution from the lowest Program Memory address. In addition to the power-on reset, another reset exists in the form of a Low Voltage Reset, LVR, where a full reset is implemented in situations where the power supply voltage falls below a certain threshold. Another type of reset is when the Watchdog Timer overflows and resets the microcontroller. All types of reset operations result in different register conditions being setup. Reset Functions There are several ways in which a microcontroller reset can occur, through events occurring both internally and externally. Power-on Reset The most fundamental and unavoidable reset is the one that occurs after power is first applied to the microcontroller. As well as ensuring that the Program Memory begins execution from the first memory address, a power-on reset also ensures that certain other registers are preset to known conditions. All the I/O port and port control registers will power up in a high condition ensuring that all pins will be first set to inputs. VDD Power-on Reset tRSTD SST Time-out Note: tRSTD is power-on delay with typical time = 50 ms Power-On Reset Timing Chart Rev. 1.10 66 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU RES Pin Reset Although the microcontroller has an internal RC reset function, if the VDD power supply rise time is not fast enough or does not stabilise quickly at power-on, the internal reset function may be incapable of providing proper reset operation. For this reason it is recommended that an external RC network is connected to the RES pin, whose additional time delay will ensure that the RES pin remains low for an extended period to allow the power supply to stabilise. During this time delay, normal operation of the microcontroller will be inhibited. After the RES line reaches a certain voltage value, the reset delay time tRSTD is invoked to provide an extra delay time after which the microcontroller will begin normal operation. The abbreviation SST in the figures stands for System Start-up Timer. For most applications a resistor connected between VDD and the RES pin and a capacitor connected between VSS and the RES pin will provide a suitable external reset circuit. Any wiring connected to the RES pin should be kept as short as possible to minimize any stray noise interference. For applications that operate within an environment where more noise is present the Enhanced Reset Circuit shown is recommended. VDD VDD 1N4148* 10kΩ~ 100kΩ 0.01µF** 300Ω* RES 0.1µF~1µF VSS Note: “*” It is recommended that this component is added for added ESD protection. “**” It is recommended that this component is added in environments where power line noise is significant. External RES Circuit More information regarding external reset circuits is located in Application Note HA0075E on the Holtek website. Pulling the RES Pin low using external hardware will also execute a device reset. In this case, as in the case of other resets, the Program Counter will reset to zero and program execution initiated from this point. RES 0.4VDD 0.9VDD tRSTD+tSST Internal Reset Note: tRSTD is power-on delay with typical time = 16.7 ms RES Reset Timing Chart There is an internal reset control register, RSTC, which is used to provide a reset when the device operates abnormally due to the environmental noise interference. If the content of the RSTC register is set to any value other than 01010101B or 10101010B, it will reset the device after 2~3 fLIRC clock cycles. After power on the register will have a value of 01010101B. Rev. 1.10 67 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU RSTC7 ~ RSTC0 Bits Reset Function 01010101B I/O pin function 10101010B RES pin function Any other value Reset MCU Internal Reset Function Control • RSTC Register Bit 7 6 5 4 3 2 1 0 Name RSTC7 RSTC6 RSTC5 RSTC4 RSTC3 RSTC2 RSTC1 RSTC0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 1 0 1 0 1 0 1 Bit 7~0RSTC7~RSTC0: Reset function control 01010101: I/O pin function 10101010: RES pin function Other values: Reset MCU If these bits are changed due to adverse environmental conditions, the microcontroller will be reset. The reset operation will be activated after 2~3 LIRC clock cycles and the RSTF bit in the RSTFC register will be set to 1. • RSTFC Register Bit 7 6 5 4 3 2 1 0 Name — — — — RSTF LVRF LRF WRF R/W — — — — R/W R/W R/W R/W POR — — — — 0 x 0 0 “x”: unknown Bit 7~4 Unimplemented, read as “0” Bit 3RSTF: Reset control register software reset flag 0: Not occurred 1: Occurred This bit is set to 1 by the RSTC control register software reset and cleared by the application program. Note that this bit can only be cleared to 0 by the application program. Bit 2LVRF: LVR function reset flag Described elsewhere. Bit 1LRF: LVR control register software reset flag Described elsewhere. Bit 0WRF: WDT control register software reset flag Described elsewhere. Rev. 1.10 68 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Low Voltage Reset – LVR The microcontroller contains a low voltage reset circuit in order to monitor the supply voltage of the device. The LVR function is always enabled with a specific LVR voltage, VLVR. If the supply voltage of the device drops to within a range of 0.9V~VLVR such as might occur when changing the battery, the LVR will automatically reset the device internally and the LVRF bit in the RSTFC register will also be set to 1. For a valid LVR signal, a low supply voltage, i.e., a voltage in the range between 0.9V~VLVR must exist for a time greater than that specified by tLVR in the LVD/LVR characteristics. If the low supply voltage state does not exceed this value, the LVR will ignore the low supply voltage and will not perform a reset function. The actual VLVR value can be selected by the LVS bits in the LVRC register. If the LVS7~LVS0 bits have any other value, which may perhaps occur due to adverse environmental conditions such as noise, the LVR will reset the device after 2~3 fLIRC clock cycles. When this happens, the LRF bit in the RSTFC register will be set to 1. After power on the register will have the value of 01010101B. Note that the LVR function will be automatically disabled when the device enters the power down mode. LVR tRSTD + tSST Internal Reset Note: tRSTD is power-on delay with typical time = 50 ms Low Voltage Reset Timing Chart • LVRC Register Bit 7 6 5 4 3 2 1 0 Name LVS7 LVS6 LVS5 LVS4 LVS3 LVS2 LVS1 LVS0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 1 0 1 0 1 0 1 Bit 7~0LVS7~LVS0: LVR voltage select 01010101: 2.1V 00110011: 2.55V 10011001: 3.15V 10101010: 3.8V Other values: Generates a MCU reset – register is reset to POR value When an actual low voltage condition occurs, as specified by one of the four defined LVR voltage value above, an MCU reset will generated. The reset operation will be activated after 2~3 fLIRC clock cycles. In this situation the register contents will remain the same after such a reset occurs. Any register value, other than the four defined register values above, will also result in the generation of an MCU reset. The reset operation will be activated after 2~3 fLIRC clock cycles. However in this situation the register contents will be reset to the POR value. Rev. 1.10 69 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • RSTFC Register Bit 7 6 5 4 3 2 1 0 Name — — — — RSTF LVRF LRF WRF R/W R/W — — — — R/W R/W R/W POR — — — — 0 x 0 0 “x”: unknown Bit 7~4 Unimplemented, read as “0” Bit 3RSTF: Reset control register software reset flag Described elsewhere. Bit 2LVRF: LVR function reset flag 0: Not occurred 1: Occurred This bit is set to 1 when a specific low voltage reset condition occurs. Note that this bit can only be cleared to 0 by the application program. Bit 1LRF: LVR control register software reset flag 0: Not occurred 1: Occurred This bit is set to 1 by the LVRC control register contains any undefined LVR voltage register values. This in effect acts like a software-reset function. Note that this bit can only be cleared to 0 by the application program. Bit 0WRF: WDT control register software reset flag Described elsewhere. Watchdog Time-out Reset during Normal Operation The Watchdog time-out Reset during normal operation is the same as the hardware Low Voltage Reset except that the Watchdog time-out flag TO will be set to “1”. WDT Time-out tRSTD + tSST Internal Reset Note: tRSTD is power-on delay with typical time = 16.7 ms WDT Time-out Reset during NORMAL Operation Timing Chart Watchdog Time-out Reset during SLEEP or IDLE Mode The Watchdog time-out Reset during SLEEP or IDLE Mode is a little different from other kinds of reset. Most of the conditions remain unchanged except that the Program Counter and the Stack Pointer will be cleared to “0” and the TO flag will be set to “1”. Refer to the A.C. Characteristics for tSST details. WDT Time-out tSST Internal Reset WDT Time-out Reset during SLEEP or IDLE Mode Timing Chart Rev. 1.10 70 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Reset Initial Conditions The different types of reset described affect the reset flags in different ways. These flags, known as PDF and TO are located in the status register and are controlled by various microcontroller operations, such as the SLEEP or IDLE Mode function or Watchdog Timer. The reset flags are shown in the table: TO PDF 0 0 Power-on reset Reset Function u u RES, LVR or USB reset during NORMAL or SLOW Mode operation 1 u WDT time-out reset during NORMAL or SLOW Mode operation 1 1 WDT time-out reset during IDLE or SLEEP Mode operation “u” stands for unchanged The following table indicates the way in which the various components of the microcontroller are affected after a power-on reset occurs. Item Reset Function Program Counter Reset to zero Interrupts All interrupts will be disabled WDT, Time Base Clear after reset, WDT begins counting Timer Modules Timer Modules will be turned off Input/Output Ports I/O ports will be setup as inputs Stack pointer Stack pointer will point to the top of the stack The different kinds of resets all affect the internal registers of the microcontroller in different ways. To ensure reliable continuation of normal program execution after a reset occurs, it is important to know what condition the microcontroller is in after a particular reset occurs. The following table describes how each type of reset affects the microcontroller internal registers. HT66F4360 HT66F4370 Reset (Power On) Program Counter ● ● 0000H 0000H 0000H 000H 0000H IAR0 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 MP0 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 IAR1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 MP1L ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 Register RES Reset (Normal Operation) RES Reset (HALT) WDT Time-out (Normal Operation) WDT Time-out (HALT)* USB-reset (Normal) USB-reset (HALT) 0000H 0000H MP1H ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 ACC ● ● xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu PCL ● ● 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 TBLP ● ● xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu TBLH ● ● xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu TBHP ● --xx xxxx --uu uuuu --uu uuuu --uu uuuu --uu uuuu --uu uuuu --uu uuuu TBHP STATUS ● PBP ● PBP ● -xxx xxxx -uuu uuuu -uuu uuuu -uuu uuuu -uuu uuuu -uuu uuuu -uuu uuuu ● xx00 xxxx uuuu uuuu uu01 uuuu xx1u uuuu uu11 uuuu uuuu uuuu uuuu uuuu ---- ---0 ---- ---0 ---- ---0 ---- ---0 ---- ---u ---- ---0 ---- ---0 ● ---- --00 ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 0000 0000 IAR2 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 MP2L ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 MP2H ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 INTC0 ● ● -000 0000 -000 0000 -000 0000 -000 0000 -uuu uuuu -000 0000 -000 0000 Rev. 1.10 71 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU HT66F4360 HT66F4370 Reset (Power On) INTC1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 INTC2 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 INTC3 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 MFI0 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 0000 0000 Register RES Reset (Normal Operation) RES Reset (HALT) WDT Time-out (Normal Operation) WDT Time-out (HALT)* USB-reset (Normal) USB-reset (HALT) uuuu uuuu 0000 0000 0000 0000 0000 0000 MFI1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 MFI2 ● ● --00 --00 --00 --00 --00 --00 --00 --00 --uu --uu --00 --00 --00 --00 MFI3 ● ● -000 -000 -000 -000 -000 -000 -000 -000 -uuu -uuu -000 -000 -000 -000 INTEG ● ● ---- --00 ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 PA ● ● 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu 1111 1111 1111 1111 PAC ● ● 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu 1111 1111 1111 1111 PAPU ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PAWU ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PB ● ● 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu 1111 1111 1111 1111 PBC ● ● 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu 1111 1111 1111 1111 PBPU ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PC ● ● 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu 1111 1111 1111 1111 PCC ● ● 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu 1111 1111 1111 1111 PCPU ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PE ● ● 1--- 1101 1--- 1101 1--- 1101 1--- 1101 u--- uuuu 1--- 1101 1--- 1101 PEC ● ● 1--- 1111 1--- 1111 1--- 1111 1--- 1111 u--- uuuu 1--- 1111 1--- 1111 PEPU ● ● 0--- 00-0 0--- 00-0 0--- 00-0 0--- 00-0 u--- uu-u 0--- 00-0 0--- 00-0 SCC ● ● 000- 0000 000- 0000 000- 0000 000- 0000 uuu- uuuu 000- 0000 000- 0000 HIRCC ● ● ---- --01 ---- --01 ---- --01 ---- --01 ---- --uu ---- --01 ---- --01 HXTC ● ● ---- -000 ---- -000 ---- -000 ---- -000 ---- -uuu ---- -000 ---- -000 LXTC ● ● ---- --00 ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 LVDC ● ● --00 0000 --00 0000 --00 0000 --00 0000 --uu uuuu --00 0000 --00 0000 0101 0101 LVRC ● ● 0101 0101 0101 0101 0101 0101 0101 0101 uuuu uuuu 0101 0101 WDTC ● ● 0101 0011 0101 0011 0101 0011 0101 0011 uuuu uuuu 0101 0011 0101 0011 RSTC ● ● 0101 0101 0101 0101 0101 0101 0101 0101 uuuu uuuu 0101 0101 0101 0101 RSTFC ● ● ---- 0x00 ---- uuuu ---- uuuu ---- uuuu ---- uuuu ---- uuuu ---- uuuu PLLC ● ● ---- --0- ---- --0- ---- --0- ---- --0- ---- --u- ---- --0- ---- --0- PSCR ● ● ---- --00 ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 TB0C ● ● 0--- -000 0--- -000 0--- -000 0--- -000 u--- -uuu 0--- -000 0--- -000 TB1C ● ● 0--- -000 0--- -000 0--- -000 0--- -000 u--- -uuu 0--- -000 0--- -000 USB_STAT ● ● 11xx 000- uuxx uuu- uuxx uuu- uuxx uuu- uuxx uuu- uuxx uuu- uuxx uuu- UINT ● ● 0000 0000 uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu USC ● ● 1000 xxxx uuuu xuux uuuu xuux uuuu xuux uuuu xuux uuuu 0100 uuuu 0100 UESR ● ● xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu 0000 0000 0000 0000 UCC ● ● 000x 0xxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuu0 u000 uuu0 u000 AWR ● ● xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu 0000 0000 0000 0000 STLI ● ● xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu 0000 0000 0000 0000 STLO ● ● xxxx xxx- uuuu uuu- uuuu uuu- uuuu uuu- uuuu uuu- 0000 000- 0000 000- SIES ● ● xx-x xxxx ux-x xuuu ux-x xuuu ux-x xuuu ux-x xuuu 00-0 0000 00-0 0000 MISC ● ● xxxx xxxx xxuu uuxx xxuu uuxx xxuu uuxx xxuu uuxx 0000 0000 0000 0000 UFIEN ● ● 0000 0000 uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu Rev. 1.10 72 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU HT66F4370 UFOEN HT66F4360 Register Reset (Power On) ● ● 0000 0000 RES Reset (Normal Operation) RES Reset (HALT) WDT Time-out (Normal Operation) WDT Time-out (HALT)* USB-reset (Normal) USB-reset (HALT) uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu UFC0 ● ● 0000 00-- uuuu uu-- uuuu uu-- uuuu uu-- uuuu uu-- uuuu uu-- uuuu uu-- UFC1 ● ● 0000 0000 uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu FARL ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx FD0L ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx FD1L ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx FD2L ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx FD3L ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx FIFO0 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx FIFO1 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx FIFO2 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx FIFO3 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx FIFO4 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx FIFO5 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx FIFO6 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx FIFO7 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx DC2DC ● ● ---- --00 ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 CCR ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CSR ● ● 1000 0000 1000 0000 1000 0000 1000 0000 uuuu uuuu 1000 0000 1000 0000 CCCR ● ● 00xx x0x0 00xx x0x0 00xx x0x0 00xx x0x0 uuxx xuxu 00xx x0x0 00xx x0x0 CETU1 ● ● 0--- -001 0--- -001 0--- -001 0--- -001 u--- -uuu 0--- -001 0--- -001 CETU0 ● ● 0111 0100 0111 0100 0111 0100 0111 0100 uuu uuuuu 0111 0100 0111 0100 CGT1 ● ● ---- ---0 ---- ---0 ---- ---0 ---- ---0 ---- ---u ---- ---0 ---- ---0 CGT0 ● ● 0000 1100 0000 1100 0000 1100 0000 1100 uuuu uuuu 0000 1100 0000 1100 CWT2 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CWT1 ● ● 0010 0101 0010 0101 0010 0101 0010 0101 uuuu uuuu 0010 0101 0010 0101 CWT0 ● ● 1000 0000 1000 0000 1000 0000 1000 0000 uuuu uuuu 1000 0000 1000 0000 0-00 0000 CIER ● ● 0-00 0000 0-00 0000 0-00 0000 0-00 0000 u-uu uuuu 0-00 0000 CIPR ● ● 0-00 0000 0-00 0000 0-00 0000 0-00 0000 u-uu uuuu 0-00 0000 0-00 0000 CTXB ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CRXB ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 STMC0 ● ● 0000 0--- 0000 0--- 0000 0--- 0000 0--- uuuu u--- 0000 0--- 0000 0--- STMC1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 STMDL ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 STMDH ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 STMAL ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 STMAH ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 STMRP ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PTMC0 ● ● 0000 0--- 0000 0--- 0000 0--- 0000 0--- uuuu u--- 0000 0--- 0000 0--- PTMC1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PTMDL ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PTMDH ● ● ---- --00 ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 PTMAL ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PTMAH ● ● ---- --00 ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 PTMRPL ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 Rev. 1.10 73 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU HT66F4370 PTMRPH HT66F4360 Register Reset (Power On) ● ● ---- --00 RES Reset (Normal Operation) RES Reset (HALT) WDT Time-out (Normal Operation) WDT Time-out (HALT)* USB-reset (Normal) USB-reset (HALT) ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 SPI0C0 ● ● 111- --00 111- --00 111- --00 111- --00 uuu- --uu 111- --00 111- --00 SPI0C1 ● ● --00 0000 --00 0000 --00 0000 --00 0000 --uu uuuu --00 0000 --00 0000 xxxx xxxx SPI0D ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx SPI1C0 ● ● 111- --00 111- --00 111- --00 111- --00 uuu- --uu 111- --00 111- --00 SPI1C1 ● ● --00 0000 --00 0000 --00 0000 --00 0000 --uu uuuu --00 0000 --00 0000 SPI1D ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx U0SR ● ● 0000 1011 0000 1011 0000 1011 0000 1011 uuuu uuuu 0000 1011 0000 1011 U0CR1 ● ● 0000 00x0 0000 00x0 0000 00x0 0000 00x0 uuuu uuuu 0000 00x0 0000 00x0 U0CR2 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 TXR_RXR0 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx BRG0 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx U1SR ● ● 0000 1011 0000 1011 0000 1011 0000 1011 uuuu uuuu 0000 1011 0000 1011 U1CR1 ● ● 0000 00x0 0000 00x0 0000 00x0 0000 00x0 uuuu uuuu 0000 00x0 0000 00x0 U1CR2 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 TXR_RXR1 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx BRG1 ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx URFC ● ● -000 -000 -000 -000 -000 -000 -000 -000 -uuu -uuu -000 -000 -000 -000 ISOC ● ● 0000 -000 0000 -000 0000 -000 0000 -000 uuuu -uuu 0000 -000 0000 -000 SYSC ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PAS0 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PAS1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PBS0 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PBS1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PCS0 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PCS1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PES0 ● ● 0000 --00 0000 --00 0000 --00 0000 --00 uuuu –uu 0000 --00 0000 --00 PES1 ● ● 00-- ---- 00-- ---- 00-- ---- 00-- ---- uu-- ---- 00-- ---- 00-- ---- PF ● ● 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu 1111 1111 1111 1111 PFC ● ● 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu 1111 1111 1111 1111 PFPU ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PFS0 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PFS1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 IICC0 ● ● ---- 000- ---- 000- ---- 000- ---- 000- ---- uuu- ---- 000- ---- 000- IICC1 ● ● 1000 0001 1000 0001 1000 0001 1000 0001 uuuu uuuu 1000 0001 1000 0001 IICD ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx IICA ● ● 0000 000- 0000 000- 0000 000- 0000 000- uuuu uuu- 0000 000- 0000 000- IICTOC ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 SADOL (ADRFS=0) ● ● xxxx ---- xxxx ---- xxxx ---- xxxx ---- uuuu ---- xxxx ---- xxxx ---- SADOL (ADRFS=1) ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx SADOH (ADRFS=0) ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx SADOH (ADRFS=1) ● ● ---- xxxx ---- xxxx ---- xxxx ---- xxxx ---- uuuu ---- xxxx ---- xxxx Rev. 1.10 74 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU HT66F4360 HT66F4370 Reset (Power On) SADC0 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 SADC1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CMP0C ● ● -000 00-- -000 00-- -000 00-- -000 00-- -uuu uu-- -000 00-- -000 00-- CMP0VOS ● ● -001 0000 -001 0000 -001 0000 -001 0000 -uuu uuuu -001 0000 -001 0000 CMP1C ● ● -000 00-- -000 00-- -000 00-- -000 00-- -uuu uu-- -000 00-- -000 00-- CMP1VOS ● ● -001 0000 -001 0000 -001 0000 -001 0000 -uuu uuuu -001 0000 -001 0000 FRCR ● ● xx-0 ---0 xx-0 ---0 xx-0 ---0 xx-0 ---0 uu-u ---u xx-0 ---0 xx-0 ---0 FCR ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 FARH ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx FD0H ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx FD1H ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx xxxx xxxx Register RES Reset (Normal Operation) RES Reset (HALT) WDT Time-out (Normal Operation) WDT Time-out (HALT)* USB-reset (Normal) USB-reset (HALT) FD2H ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx FD3H ● ● xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu xxxx xxxx xxxx xxxx CTM0C0 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CTM0C1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CTM0DL ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CTM0DH ● ● ---- --00 ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 CTM0AL ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CTM0AH ● ● ---- --00 ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 CTM1C0 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CTM1C1 ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CTM1DL ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CTM1DH ● ● ---- --00 ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 CTM1AL ● ● 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 CTM1AH ● ● ---- --00 ---- --00 ---- --00 ---- --00 ---- --uu ---- --00 ---- --00 Note: “u” stands for unchanged “x” stands for “unknown” “-” stands for unimplemented Rev. 1.10 75 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Input/Output Ports Holtek microcontrollers offer considerable flexibility on their I/O ports. With the input or output designation of every pin fully under user program control, pull-high selections for all ports and wake-up selections on certain pins, the user is provided with an I/O structure to meet the needs of a wide range of application possibilities. These devices provide bidirectional input/output lines labeled with port names PA~PF. These I/O ports are mapped to the RAM Data Memory with specific addresses as shown in the Special Purpose Data Memory table. All of these I/O ports can be used for input and output operations. For input operation, these ports are non-latching, which means the inputs must be ready at the T2 rising edge of instruction “MOV A, [m]”, where m denotes the port address. For output operation, all the data is latched and remains unchanged until the output latch is rewritten. Bit Register Name 7 6 5 4 3 2 1 0 PA PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0 PAC PAC7 PAC6 PAC5 PAC4 PAC3 PAC2 PAC1 PAC0 PAPU PAPU7 PAPU6 PAPU5 PAPU4 PAPU3 PAPU2 PAPU1 PAPU0 PAWU PAWU7 PAWU6 PAWU5 PAWU4 PAWU3 PAWU2 PAWU1 PAWU0 PB PB7 PB6 PB5 PB4 PB3 PB2 PB1 PB0 PBC PBC7 PBC6 PBC5 PBC4 PBC3 PBC2 PBC1 PBC0 PBPU PBPU7 PBPU6 PBPU5 PBPU4 PBPU3 PBPU2 PBPU1 PBPU0 PC PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 PCC PCC7 PCC6 PCC5 PCC4 PCC3 PCC2 PCC1 PCC0 PCPU PCPU7 PCPU6 PCPU5 PCPU4 PCPU3 PCPU2 PCPU1 PCPU0 PE PE7 — — — PE3 PE2 PE1 PE0 PEC PEC7 — — — PEC3 PEC2 — PEC0 PEPU PEPU7 — — — PEPU3 PEPU2 — PEPU0 PF PF7 PF6 PF5 PF4 PF3 PF2 PF1 PF0 PFC PFC7 PFC6 PFC5 PFC4 PFC3 PFC2 PFC1 PFC0 PFPU PFPU7 PFPU6 PFPU5 PFPU4 PFPU3 PFPU2 PFPU1 PFPU0 I/O Registers List PAn/PBn/PCn/PEn/PFn: I/O Port Data bit 0: Data 0 1: Data 1 Pull-high Resistors Many product applications require pull-high resistors for their switch inputs usually requiring the use of an external resistor. To eliminate the need for these external resistors, all I/O pins, when configured as an input have the capability of being connected to an internal pull-high resistor. These pull-high resistors are selected using the relevant pull-high control registers and are implemented using weak PMOS transistors. Note that the pull-high resistor can be controlled by the relevant pull-high control register only when the pin-shared functional pin is selected as an input or NMOS output. Otherwise, the pull-high resistors can not be enabled. Rev. 1.10 76 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU PAPU Register Bit 7 6 5 4 3 2 1 0 Name PAPU7 PAPU6 PAPU5 PAPU4 PAPU3 PAPU2 PAPU1 PAPU0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0PAPU7~PAPU0: Port A bit 7~bit 0 pull-high function control 0: Disable 1: Enable Port A Wake-up The HALT instruction forces the microcontroller into the SLEEP or IDLE Mode which preserves power, a feature that is important for battery and other low-power applications. Various methods exist to wake-up the microcontroller, one of which is to change the logic condition on one of the Port A pins from high to low. This function is especially suitable for applications that can be woken up via external switches. Each pin on Port A can be selected individually to have this wake-up feature using the PAWU register. Note that the wake-up function can be controlled by the wake-up control registers only when the pin-shared functional pin is selected as general purpose input/output and the MCU enters the Power down mode. PAWU Register Bit 7 6 5 4 3 2 1 0 Name PAWU7 PAWU6 PAWU5 PAWU4 PAWU3 PAWU2 PAWU1 PAWU0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0PAWU7~PAWU0: Port A bit 7~bit 0 wake-up function control 0: Disable 1: Enable I/O Port Control Registers Each Port has its own control register, known as PAC~PFC, which controls the input/output configuration. With this control register, each I/O pin with or without pull-high resistors can be reconfigured dynamically under software control. For the I/O pin to function as an input, the corresponding bit of the control register must be written as a “1”. This will then allow the logic state of the input pin to be directly read by instructions. When the corresponding bit of the control register is written as a “0”, the I/O pin will be setup as a CMOS output. If the pin is currently setup as an output, instructions can still be used to read the output register. However, it should be noted that the program will in fact only read the status of the output data latch and not the actual logic status of the output pin. Register Name Bit 7 6 5 4 3 2 1 0 PAC PAC7 PAC6 PAC5 PAC4 PAC3 PAC2 PAC1 PAC0 PBC PBC7 PBC6 PBC5 PBC4 PBC3 PBC2 PBC1 PBC0 PCC PCC7 PCC6 PCC5 PCC4 PCC3 PCC2 PCC1 PCC0 PEC PEC7 — — — PEC3 PEC2 — PEC0 PFC PFC7 PFC6 PFC5 PFC4 PFC3 PFC2 PFC1 PFC0 PACn/PBCn/ PCCn/ PECn/ PFCn: I/O Port bit n Input/Output control 0: Output 1: Input Rev. 1.10 77 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Pin-shared Functions The flexibility of the microcontroller range is greatly enhanced by the use of pins that have more than one function. Limited numbers of pins can force serious design constraints on designers but by supplying pins with multi-functions, many of these difficulties can be overcome. For these pins, the desired function of the multi-function I/O pins is selected by a series of registers via the application program control. Pin-shared Function Selection Registers The limited number of supplied pins in a package can impose restrictions on the amount of functions a certain device can contain. However by allowing the same pins to share several different functions and providing a means of function selection, a wide range of different functions can be incorporated into even relatively small package sizes. Each device includes Port “x” output function Selection register “n”, labeled as PxSn, which can select the desired functions of the multi-function pin-shared pins. The most important point to note is to make sure that the desired pin-shared function is properly selected and also deselected. To select the desired pin-shared function, the pin-shared function should first be correctly selected using the corresponding pin-shared control register. After that the corresponding peripheral functional setting should be configured and then the peripheral function can be enabled. To correctly deselect the pin-shared function, the peripheral function should first be disabled and then the corresponding pin-shared function control register can be modified to select other pin-shared functions. Bit Register Name 7 6 5 4 3 2 1 0 PAS00 PAS0 PAS07 PAS06 PAS05 PAS04 PAS03 PAS02 PAS01 PAS1 PAS17 PAS16 PAS15 PAS14 PAS13 PAS12 PAS11 PAS10 PBS0 PBS07 PBS06 PBS05 PBS04 PBS03 PBS02 PBS01 PBS00 PBS1 PBS17 PBS16 PBS15 PBS14 PBS13 PBS12 PBS11 PBS10 PCS0 PCS07 PCS06 PCS05 PCS04 PCS03 PCS02 PCS01 PCS00 PCS1 PCS17 PCS16 PCS15 PCS14 PCS13 PCS12 PCS11 PCS10 PES0 PES07 PES06 PES05 PES04 — — PES01 PES00 PES1 D7 D6 — — — — — — PFS0 PFS07 PFS06 PFS05 PFS04 PFS03 PFS02 PFS01 PFS00 PFS1 PFS17 PFS16 PFS15 PFS14 PFS13 PFS12 PFS11 PFS10 Pin-shared Function Selection Registers List Rev. 1.10 78 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • PAS0 Register Bit 7 6 5 4 3 2 1 0 Name PAS07 PAS06 PAS05 PAS04 PAS03 PAS02 PAS01 PAS00 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~6PAS07~PAS06: PA3 pin function selection 00/01: PA3 10: TX0 11: C0+ Bit 5~4PAS05~PAS04: PA2 pin function selection 00/01/10/11: PA2 Bit 3~2PAS03~PAS02: PA1 pin function selection 00/01: PA1 10: RX0 11: C0X Bit 1~0PAS01~PAS00: PA0 pin function selection 00/01/10/11: PA0 • PAS1 Register Bit 7 6 5 4 3 2 1 0 Name PAS17 PAS16 PAS15 PAS14 PAS13 PAS12 PAS11 PAS10 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~6PAS17~PAS16: PA7 pin function selection 00/01: PA7 10: SCS0 11: C1Bit 5~4PAS15~PAS14: PA6 pin function selection 00/01: PA6 10: SCK0 11: C1+ Bit 3~2PAS13~PAS12: PA5 pin function selection 00/01: PA5 10: SDI0 11: C1X Bit 1~0PAS11~PAS10: PA4 pin function selection 00/01: PA4 10: SDO0 11: C0- Rev. 1.10 79 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • PBS0 Register Bit 7 6 5 4 3 2 1 0 Name PBS07 PBS06 PBS05 PBS04 PBS03 PBS02 PBS01 PBS00 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~6PBS07~PBS06: PB3 pin function selection 00/01: PB3 10: SCS1 11: AN3 Bit 5~4PBS05~PBS04: PB2 pin function selection 00/01: PB2 10: SCK1 11: AN2 Bit 3~2PBS03~PBS02: PB1 pin function selection 00/01: PB1 10: SDI1 11: AN1 Bit 1~0PBS01~PBS00: PB0 pin function selection 00/01: PB0 10: SDO1 11: AN0 • PBS1 Register Bit 7 6 5 4 3 2 1 0 Name PBS17 PBS16 PBS15 PBS14 PBS13 PBS12 PBS11 PBS10 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~6PBS17~PBS16: PB7 pin function selection 00/01: PB7 10: VREF 11: AN7 Bit 5~4PBS15~PBS14: PB6 pin function selection 00/01: PB6 10: RX1 11: AN6 Bit 3~2PBS13~PBS12: PB5 pin function selection 00/01: PB5 10: TX1 11: AN5 Bit 1~0PBS11~PBS10: PB4 pin function selection 00/01/10: PB4/PTPI/INT1 11: AN4 Rev. 1.10 80 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • PCS0 Register Bit 7 6 5 4 3 2 1 0 Name PCS07 PCS06 PCS05 PCS04 PCS03 PCS02 PCS01 PCS00 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~6PCS07~PCS06: PC3 pin function selection 00/01/10: PC3 11: STPB Bit 5~4PCS05~PCS04: PC2 pin function selection 00/01/10: PC2 11: PTPB Bit 3~2PCS03~PCS02: PC1 pin function selection 00/01/10: PC1 11: CTP1B Bit 1~0PCS01~PCS00: PC0 pin function selection 00/01/10: PC0 11: CTP0B • PCS1 Register Bit 7 6 5 4 3 2 1 0 Name PCS17 PCS16 PCS15 PCS14 PCS13 PCS12 PCS11 PCS10 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 3 2 1 0 Bit 7~6PCS17~PCS16: PC7 pin function selection 00/01/10: PC7/STCK 11: SDA Bit 5~4PCS15~PCS14: PC6 pin function selection 00/01/10: PC6/PTCK 11: SCL Bit 3~2PCS13~PCS12: PC5 pin function selection 00/01/10/11: PC5/CTCK1 Bit 1~0PCS11~PCS10: PC4 pin function selection 00/01/10/11: PC4/CTCK0 • PES0 Register Bit 7 6 5 4 Name PES07 PES06 PES05 PES04 — — PES01 PES00 R/W R/W R/W R/W R/W — — R/W R/W POR 0 0 0 0 — — 0 0 Bit 7~6PES07~PES06: PE3 pin function selection 00/01/10: PE3 11: OSC2 Bit 5~4PES05~PES04: PE2 pin function selection 00/01/10: PE2 11: OSC1 Bit 3~2 Unimplemented, read as “0” Bit 1~0PES01~PES00: PE0 pin function selection 00/01/10: PE0 11: VDDIO Rev. 1.10 81 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • PES1 Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 — — — — — — R/W R/W R/W — — — — — — POR 0 0 — — — — — — Bit 7~6D7~D6: Reserved bits, can be read and written. Bit 5~0 Unimplemented, read as “0” • PFS0 Register Bit 7 6 5 4 3 2 1 0 Name PFS07 PFS06 PFS05 PFS04 PFS03 PFS02 PFS01 PFS00 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~6PFS07~PFS06: PF3 pin function selection 00/01/10: PF3 11: STP Bit 5~4PFS05~PFS04: PF2 pin function selection 00/01/10: PF2 11: PTP Bit 3~2PFS03~PFS02: PF1 pin function selection 00/01/10: PF1 11: CTP1 Bit 1~0PFS01~PFS00: PF0 pin function selection 00/01/10: PF0 11: CTP0 • PFS1 Register Bit 7 6 5 4 3 2 1 0 Name PFS17 PFS16 PFS15 PFS14 PFS13 PFS12 PFS11 PFS10 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~6PFS17~PFS16: PF7 pin function selection 00/01/10/11: PF7 Bit 5~4PFS15~PFS14: PF6 pin function selection 00/01/10/11: PF6 Bit 3~2PFS13~PFS12: PF5 pin function selection 00/01/10/11: PF5 Bit 1~0PFS11~PFS10: PF4 pin function selection 00/01/10/11: PF4 Rev. 1.10 82 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU I/O Pin Structures The accompanying diagrams illustrate the internal structures of some generic I/O pin types. As the exact logical construction of the I/O pin will differ from these drawings, they are supplied as a guide only to assist with the functional understanding of the I/O pins. The wide range of pin-shared structures does not permit all types to be shown. Generic Input/Output Structure A/D Input/Output Structure Rev. 1.10 83 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Programming Considerations Within the user program, one of the things first to consider is port initialisation. After a reset, all of the I/O data and port control registers will be set to high. This means that all I/O pins will be defaulted to an input state, the level of which depends on the other connected circuitry and whether pull-high selections have been chosen. If the port control registers are then programmed to setup some pins as outputs, these output pins will have an initial high output value unless the associated port data registers are first programmed. Selecting which pins are inputs and which are outputs can be achieved byte-wide by loading the correct values into the appropriate port control register or by programming individual bits in the port control register using the “SET [m].i” and “CLR [m].i” instructions. Note that when using these bit control instructions, a read-modify-write operation takes place. The microcontroller must first read in the data on the entire port, modify it to the required new bit values and then rewrite this data back to the output ports. Port A has the additional capability of providing wake-up functions. When the device is in the SLEEP or IDLE Mode, various methods are available to wake the device up. One of these is a high to low transition of any of the Port A pins. Single or multiple pins on Port A can be setup to have this function. Timer Modules – TM One of the most fundamental functions in any microcontroller devices is the ability to control and measure time. To implement time related functions the device includes several Timer Modules, generally abbreviated to the name TM. The TMs are multi-purpose timing units and serve to provide operations such as Timer/Counter, Input Capture, Compare Match Output and Single Pulse Output as well as being the functional unit for the generation of PWM signals. Each of the TMs has two interrupts. The addition of input and output pins for each TM ensures that users are provided with timing units with a wide and flexible range of features. The common features of the different TM types are described here with more detailed information provided in the individual Compact, Standard and Periodic TM sections. Introduction These devices contain four TMs and each individual TM can be categorised as a certain type, namely Compact Type TM, Standard Type TM or Periodic Type TM. Although similar in nature, the different TM types vary in their feature complexity. The common features to all of the Compact, Standard and Periodic TMs will be described in this section and the detailed operation regarding each of the TM types will be described in separate sections. The main features and differences between the three types of TMs are summarised in the accompanying table. CTM STM Timer/Counter TM Function √ √ PTM √ Input Capture — √ √ Compare Match Output √ √ √ PWM Channels 1 1 1 Single Pulse Output — 1 1 PWM Alignment PWM Adjustment Period & Duty Edge Edge Edge Duty or Period Duty or Period Duty or Period TM Function Summary Rev. 1.10 84 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU TM Operation The different types of TM offer a diverse range of functions, from simple timing operations to PWM signal generation. The key to understanding how the TM operates is to see it in terms of a free running count-up counter whose value is then compared with the value of pre-programmed internal comparators. When the free running count-up counter has the same value as the pre-programmed comparator, known as a compare match situation, a TM interrupt signal will be generated which can clear the counter and perhaps also change the condition of the TM output pin. The internal TM counter is driven by a user selectable clock source, which can be an internal clock or an external pin. TM Clock Source The clock source which drives the main counter in each TM can originate from various sources. The selection of the required clock source is implemented using the xTnCK2~xTnCK0 bits in the xTMn control registers, where “x” stands for C, S or P type TM and “n” stands for the specific TM serial number. For STM and PTM there is no serial number “n” in the relevant pin or control bits since there is only one STM and PTM respectively in the series of devices, The clock source can be a ratio of the system clock, fSYS, or the internal high clock, fH, the fSUB clock source or the external xTCKn pin. The xTCKn pin clock source is used to allow an external signal to drive the TM as an external clock source for event counting. TM Interrupts The Compact, Standard or Periodic type TM has two internal interrupt, one for each of the internal comparator A or comparator P, which generate a TM interrupt when a compare match condition occurs. When a TM interrupt is generated, it can be used to clear the counter and also to change the state of the TM output pin. TM External Pins Each of the TMs, irrespective of what type, has one or two TM input pins, with the label xTCKn and xTPnI respectively. The xTMn input pin, xTCKn, is essentially a clock source for the xTMn and is selected using the xTnCK2~xTnCK0 bits in the xTMnC0 register. This external TM input pin allows an external clock source to drive the internal TM. The xTCKn input pin can be chosen to have either a rising or falling active edge. The STCK and PTCK pins are also used as the external trigger input pin in single pulse output mode for the STM and PTM respectively. The other xTM input pin, STPI or PTPI, is the capture input whose active edge can be a rising edge, a falling edge or both rising and falling edges and the active edge transition type is selected using the STIO1~STIO0 or PTIO1~PTIO0 bits in the STMC1 or PTMC1 register respectively. There is another capture input, PTCK, for PTM capture input mode, which can be used as the external trigger input source except the PTPI pin. The TMs each have two output pins, xTPn and xTPnB. The xTPnB is the inverted signal of the xTPn output. The TM output pins can be selected using the corresponding pin-shared function selection bits described in the Pin-shared Function section. When the TM is in the Compare Match Output Mode, these pins can be controlled by the TM to switch to a high or low level or to toggle when a compare match situation occurs. The external xTPn or xTPnB output pin is also the pin where the TM generates the PWM output waveform. As the TM output pins are pin-shared with other functions, the TM output function must first be setup using relevant pin-shared function selection register. Rev. 1.10 85 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Device HT66F4360 HT66F4370 CTM Input STM Output Input PTM Output Input Output CTP0, CTP0B STCK, STPI STP, STPB PTCK, PTPI CTP1, CTP1B CTCK0 CTCK1 PTP, PTPB TM External Pins TM Input/Output Pin Selection Selecting to have a TM input/output or whether to retain its other shared function is implemented using the relevant pin-shared function selection registers, with the corresponding selection bits in each pin-shared function register corresponding to a TM input/output pin. Configuring the selection bits correctly will setup the corresponding pin as a TM input/output. The details of the pin-shared function selection are described in the pin-shared function section. CTCKn CTMn CCR output CTPn CTPnB CTM Function Pin Control Block Diagram – n = 0 or 1 STCK CCR capture input STPI STM CCR output STP STPB STM Function Pin Control Block Diagram PTCK CCR capture input PTPI PTM CCR output PTP PTPB PTM Function Pin Control Block Diagram Rev. 1.10 86 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Programming Considerations The TM Counter Registers and the Capture/Compare CCRA and CCRP registers, all have a low and high byte structure. The high bytes can be directly accessed, but as the low bytes can only be accessed via an internal 8-bit buffer, reading or writing to these register pairs must be carried out in a specific way. The important point to note is that data transfer to and from the 8-bit buffer and its related low byte only takes place when a write or read operation to its corresponding high byte is executed. As the CCRA and CCRP registers are implemented in the way shown in the following diagram and accessing these register pairs is carried out in a specific way as described above, it is recommended to use the “MOV” instruction to access the CCRA and CCRP low byte registers, named xTMnAL and PTMRPL, using the following access procedures. Accessing the CCRA or CCRB low byte registers without following these access procedures will result in unpredictable values. xTMn Counter Register (Read only) xTMnDL xTMnDH 8-bit Buffer xTMnAL xTMnAH xTMn CCRA Register (Read/Write) PTMRPL PTMRPH PTM CCRP Register (Read/Write) Data Bus The following steps show the read and write procedures: • Writing Data to CCRA or CCRP ♦♦ Step 1. Write data to Low Byte xTMnAL or PTMRPL ––note that here data is only written to the 8-bit buffer. ♦♦ Step 2. Write data to High Byte xTMnAH or PTMRPH ––here data is written directly to the high byte registers and simultaneously data is latched from the 8-bit buffer to the Low Byte registers. • Reading Data from the Counter Registers and CCRA or CCRP Rev. 1.10 ♦♦ Step 1. Read data from the High Byte xTMnDH, xTMnAH or PTMRPH ––here data is read directly from the High Byte registers and simultaneously data is latched from the Low Byte register into the 8-bit buffer. ♦♦ Step 2. Read data from the Low Byte xTMnDL, xTMnAL or PTMRPL ––this step reads data from the 8-bit buffer. 87 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Compact Type TM – CTM Although the simplest form of the TM types, the Compact TM type still contains three operating modes, which are Compare Match Output, Timer/Event Counter and PWM Output modes. The Compact TM can also be controlled with an external input pin and can drive two external output pin. Device CTM Core HT66F4360 HT66F4370 10-bit CTM (CTM0, CTM1) CTM Input Pin CTM Output Pin Note CTCK0, CTCK1 CTP0, CTP0B CTP1, CTP1B n=0~1 CCRP fSYS/4 fSYS fH/16 fH/64 fSUB fSUB 3-bit Comparator P 001 011 10-bit Co�nt-�p Co�nter 100 101 111 CTnON CTnP�U Co�nter Clear 0 1 CTnCCLR b0~b9 10-bit Comparator � CTMnPF Interr�pt CTnOC b7~b9 010 110 CTCKn Comparator P Match 000 Comparator � Match O�tp�t Control Polarity Control Pin Control CTnM1� CTnM0 CTnIO1� CTnIO0 CTnPOL PxSn CTPn CTPnB CTMn�F Interr�pt CTnCK�~CTnCK0 CCR� Compact Type TM Block Diagram – n = 0 or 1 Compact TM Operation The Compact TM core is a 10-bit count-up counter which is driven by a user selectable internal or external clock source. There are also two internal comparators with the names, Comparator A and Comparator P. These comparators will compare the value in the counter with CCRP and CCRA registers. The CCRP is three-bit wide whose value is compared with the highest three bits in the counter while the CCRA is ten-bit wide and therefore compares with all counter bits. The only way of changing the value of the 10-bit counter using the application program, is to clear the counter by changing the CTnON bit from low to high. The counter will also be cleared automatically by a counter overflow or a compare match with one of its associated comparators. When these conditions occur, a TM interrupt signal will also usually be generated. The Compact Type TM can operate in a number of different operational modes, can be driven by different clock sources including an input pin and can also control an output pin. All operating setup conditions are selected using relevant internal registers. Rev. 1.10 88 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Compact Type TM Register Description Overall operation of the Compact TM is controlled using a series of registers. A read only register pair exists to store the internal counter 10-bit value, while a read/write register pair exists to store the internal 10-bit CCRA value. The remaining two registers are control registers which setup the different operating and control modes and as well as the three CCRP bits. Bit Register Name 7 6 5 4 3 2 1 0 CTMnC0 CTnPAU CTnCK2 CTnCK1 CTnCK0 CTnON CTnRP2 CTnRP1 CTnRP0 CTMnC1 CTnM1 CTnM0 CTnIO1 CTnIO0 CTnOC CTnPOL CTnDPX CTnCCLR CTMnDL D7 D6 D5 D4 D3 D2 D1 CTMnDH — — — — — — D9 D8 CTMnAL D7 D6 D5 D4 D3 D2 D1 D0 CTMnAH — — — — — — D9 D8 D0 10-bit Compact TM Registers List – n = 0 or 1 CTMnDL Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R R R R R R R R POR 0 0 0 0 0 0 0 0 Bit 7~0 CTMn Counter Low Byte Register bit 7 ~ bit 0 CTMn 10-bit Counter bit 7 ~ bit 0 CTMnDH Register Bit 7 6 5 4 3 2 1 0 Name — — — — — — D9 D8 R/W — — — — — — R R POR — — — — — — 0 0 2 1 0 Bit 7~2 Unimplemented, read as “0” Bit 1~0 CTMn Counter High Byte Register bit 1 ~ bit 0 CTMn 10-bit Counter bit 9 ~ bit 8 CTMnAL Register Bit 6 5 4 3 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0 Rev. 1.10 7 CTMn CCRA Low Byte Register bit 7 ~ bit 0 CTMn 10-bit CCRA bit 7 ~ bit 0 89 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU CTMnAH Register Bit 7 6 5 4 3 2 1 0 Name — — — — — — D9 D8 R/W — — — — — — R/W R/W POR — — — — — — 0 0 Bit 7~2 Unimplemented, read as “0” Bit 1~0 CTMn CCRA High Byte Register bit 1 ~ bit 0 CTMn 10-bit CCRA bit 9 ~ bit 8 CTMnC0 Register Bit 7 6 5 4 3 2 1 0 Name CTnPAU CTnCK2 CTnCK1 CTnCK0 CTnON CTnRP2 CTnRP1 CTnRP0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7CTnPAU: CTMn Counter Pause control 0: Run 1: Pause The counter can be paused by setting this bit high. Clearing the bit to zero restores normal counter operation. When in a Pause condition the CTMn will remain powered up and continue to consume power. The counter will retain its residual value when this bit changes from low to high and resume counting from this value when the bit changes to a low value again. Bit 6~4CTnCK2~CTnCK0: Select CTMn Counter clock 000: fSYS/4 001: fSYS 010: fH/16 011: fH/64 100: fSUB 101: fSUB 110: CTCKn rising edge clock 111: CTCKn falling edge clock These three bits are used to select the clock source for the CTMn. The external pin clock source can be chosen to be active on the rising or falling edge. The clock source fSYS is the system clock, while fH and fSUB are other internal clocks, the details of which can be found in the oscillator section. Bit 3CTnON: CTMn Counter On/Off control 0: Off 1: On This bit controls the overall on/off function of the CTMn. Setting the bit high enables the counter to run while clearing the bit disables the CTMn. Clearing this bit to zero will stop the counter from counting and turn off the CTMn which will reduce its power consumption. When the bit changes state from low to high the internal counter value will be reset to zero, however when the bit changes from high to low, the internal counter will retain its residual value until the bit returns high again. If the CTMn is in the Compare Match Output Mode then the CTMn output pin will be reset to its initial condition, as specified by the CTnOC bit, when the CTnON bit changes from low to high. Rev. 1.10 90 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 2~0CTnRP2~CTnRP0: CTMn CCRP 3-bit register, compared with the CTMn Counter bit 9 ~ bit 7 000: 1024 CTMn clocks 001: 128 CTMn clocks 010: 256 CTMn clocks 011: 384 CTMn clocks 100: 512 CTMn clocks 101: 640 CTMn clocks 110: 768 CTMn clocks 111: 896 CTMn clocks These three bits are used to setup the value on the internal CCRP 3-bit register, which are then compared with the internal counter’s highest three bits. The result of this comparison can be selected to clear the internal counter if the CTnCCLR bit is set to zero. Setting the CTnCCLR bit to zero ensures that a compare match with the CCRP values will reset the internal counter. As the CCRP bits are only compared with the highest three counter bits, the compare values exist in 128 clock cycle multiples. Clearing all three bits to zero is in effect allowing the counter to overflow at its maximum value. CTMnC1 Register Bit 7 6 5 4 3 2 1 0 Name CTnM1 CTnM0 CTnIO1 CTnIO0 CTnOC CTnPOL R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 CTnDPX CTnCCLR Bit 7~6CTnM1~CTnM0: Select CTMn Operating Mode 00: Compare Match Output Mode 01: Undefined 10: PWM Mode 11: Timer/Counter Mode These bits setup the required operating mode for the CTMn. To ensure reliable operation the CTMn should be switched off before any changes are made to the CTnM1 and CTnM0 bits. In the Timer/Counter Mode, the CTMn output pin control will be disabled. Bit 5~4CTnIO1~CTnIO0: Select CTMn external pin (CTPn) function Compare Match Output Mode 00: No change 01: Output low 10: Output high 11: Toggle output PWM Output Mode 00: PWM output inactive state 01: PWM output active state 10: PWM output 11: Undefined Timer/Counter Mode Unused These two bits are used to determine how the CTMn output pin changes state when a certain condition is reached. The function that these bits select depends upon in which mode the CTMn is running. Rev. 1.10 91 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU In the Compare Match Output Mode, the CTnIO1 and CTnIO0 bits determine how the CTMn output pin changes state when a compare match occurs from the Comparator A. The CTMn output pin can be setup to switch high, switch low or to toggle its present state when a compare match occurs from the Comparator A. When the bits are both zero, then no change will take place on the output. The initial value of the CTMn output pin should be setup using the CTnOC bit in the CTMnC1 register. Note that the output level requested by the CTnIO1 and CTnIO0 bits must be different from the initial value setup using the CTnOC bit otherwise no change will occur on the CTMn output pin when a compare match occurs. After the CTMn output pin changes state, it can be reset to its initial level by changing the level of the CTnON bit from low to high. In the PWM Mode, the CTnIO1 and CTnIO0 bits determine how the CTMn output pin changes state when a certain compare match condition occurs. The PWM output function is modified by changing these two bits. It is necessary to only change the values of the CTnIO1 and CTnIO0 bits only after the CTMn has been switched off. Unpredictable PWM outputs will occur if the CTnIO1 and CTnIO0 bits are changed when the CTMn is running. Bit 3CTnOC: CTPn Output control Compare Match Output Mode 0: Initial low 1: Initial high PWM Output Mode 0: Active low 1: Active high This is the output control bit for the CTMn output pin. Its operation depends upon whether CTMn is being used in the Compare Match Output Mode or in the PWM Mode. It has no effect if the CTMn is in the Timer/Counter Mode. In the Compare Match Output Mode it determines the logic level of the CTMn output pin before a compare match occurs. In the PWM Mode it determines if the PWM signal is active high or active low. Bit 2CTnPOL: CTPn Output polarity control 0: Non-inverted 1: Inverted This bit controls the polarity of the CTPn output pin. When the bit is set high the CTMn output pin will be inverted and not inverted when the bit is zero. It has no effect if the TM is in the Timer/Counter Mode. Bit 1CTnDPX: CTMn PWM duty/period control 0: CCRP – period; CCRA – duty 1: CCRP – duty; CCRA – period This bit determines which of the CCRA and CCRP registers are used for period and duty control of the PWM waveform. Bit 0CTnCCLR: CTMn Counter Clear condition selection 0: CTMn Comparator P match 1: CTMn Comparator A match This bit is used to select the method which clears the counter. Remember that the Compact TM contains two comparators, Comparator A and Comparator P, either of which can be selected to clear the internal counter. With the CTnCCLR bit set high, the counter will be cleared when a compare match occurs from the Comparator A. When the bit is low, the counter will be cleared when a compare match occurs from the Comparator P or with a counter overflow. A counter overflow clearing method can only be implemented if the CCRP bits are all cleared to zero. The CTnCCLR bit is not used in the PWM Mode. Rev. 1.10 92 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Compact Type TM Operation Modes The Compact Type TM can operate in one of three operating modes, Compare Match Output Mode, PWM Mode or Timer/Counter Mode. The operating mode is selected using the CTnM1 and CTnM0 bits in the CTMnC1 register. Compare Match Output Mode To select this mode, bits CTnM1 and CTnM0 in the CTMnC1 register, should be set to “00” respectively. In this mode once the counter is enabled and running it can be cleared by three methods. These are a counter overflow, a compare match from Comparator A and a compare match from Comparator P. When the CTnCCLR bit is low, there are two ways in which the counter can be cleared. One is when a compare match occurs from Comparator P, the other is when the CCRP bits are all zero which allows the counter to overflow. Here both CTMnAF and CTMnPF interrupt request flags for the Comparator A and Comparator P respectively, will both be generated. If the CTnCCLR bit in the CTMnC1 register is high then the counter will be cleared when a compare match occurs from Comparator A. However, here only the CTMnAF interrupt request flag will be generated even if the value of the CCRP bits is less than that of the CCRA registers. Therefore when CTnCCLR is high no CTMnPF interrupt request flag will be generated. If the CCRA bits are all zero, the counter will overflow when its reaches its maximum 10-bit, 3FF Hex, value, however here the CTMnAF interrupt request flag will not be generated. As the name of the mode suggests, after a comparison is made, the CTMn output pin will change state. The CTMn output pin condition however only changes state when a CTMnAF interrupt request flag is generated after a compare match occurs from Comparator A. The CTMnPF interrupt request flag, generated from a compare match occurs from Comparator P, will have no effect on the CTMn output pin. The way in which the CTMn output pin changes state are determined by the condition of the CTnIO1 and CTnIO0 bits in the CTMnC1 register. The CTMn output pin can be selected using the CTnIO1 and CTnIO0 bits to go high, to go low or to toggle from its present condition when a compare match occurs from Comparator A. The initial condition of the CTMn output pin, which is setup after the CTnON bit changes from low to high, is setup using the CTnOC bit. Note that if the CTnIO1 and CTnIO0 bits are zero then no pin change will take place. Rev. 1.10 93 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value Counter overflow CCRP=0 0x3FF CTnCCLR = 0; CTnM [1:0] = 00 CCRP > 0 Counter cleared by CCRP value CCRP > 0 Counter Restart Resume CCRP Pause CCRA Stop Time CTnON CTnPAU CTnPOL CCRP Int. flag CTMnPF CCRA Int. flag CTMnAF CTMn O/P Pin Output pin set to initial Level Low if CTnOC=0 Output not affected by CTMnAF flag. Remains High until reset by CTnON bit Output Toggle with CTMnAF flag Here CTnIO [1:0] = 11 Toggle Output select Note CTnIO [1:0] = 10 Active High Output select Output Inverts when CTnPOL is high Output Pin Reset to Initial value Output controlled by other pin-shared function Compare Match Output Mode – CTnCCLR = 0 Note: 1. With CTnCCLR = 0, a Comparator P match will clear the counter 2. The CTMn output pin controlled only by CTMnAF flag 3. The output pin is reset to its initial state by CTnON bit rising edge 4. n = 0 or 1 Rev. 1.10 94 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value CTnCCLR = 1; CTnM [1:0] = 00 CCRA = 0 Counter overflow CCRA > 0 Counter cleared by CCRA value 0x3FF CCRA=0 Resume CCRA Pause Stop Counter Restart CCRP Time CTnON CTnPAU CTnPOL No CTMnAF flag generated on CCRA overflow CCRA Int. flag CTMnAF CCRP Int. flag CTMnPF CTMn O/P Pin CTMnPF not generated Output pin set to initial Level Low if CTnOC=0 Output does not change Output not affected by CTMnAF flag. Remains High until reset by CTnON bit Output Toggle with CTMnAF flag Here CTnIO [1:0] = 11 Toggle Output select Note CTnIO [1:0] = 10 Active High Output select Output Inverts when CTnPOL is high Output Pin Reset to Initial value Output controlled by other pin-shared function Compare Match Output Mode – CTnCCLR = 1 Note: 1. With CTnCCLR = 1, a Comparator A match will clear the counter 2. The CTMn output pin is controlled only by CTMnAF flag 3. The CTMn output pin is reset to initial state by CTnON rising edge 4. The CTMnPF flags is not generated when CTnCCLR = 1 5. n = 0 or 1 Rev. 1.10 95 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Timer/Counter Mode To select this mode, bits CTnM1 and CTnM0 in the CTMnC1 register should be set to 11 respectively. The Timer/Counter Mode operates in an identical way to the Compare Match Output Mode generating the same interrupt flags. The exception is that in the Timer/Counter Mode the CTMn output pin is not used. Therefore the above description and Timing Diagrams for the Compare Match Output Mode can be used to understand its function. As the CTMn output pin is not used in this mode, the pin can be used as a normal I/O pin or other pin-shared function. PWM Output Mode To select this mode, bits CTnM1 and CTnM0 in the CTMnC1 register should be set to 10 respectively. The PWM function within the CTMn is useful for applications which require functions such as motor control, heating control, illumination control etc. By providing a signal of fixed frequency but of varying duty cycle on the CTMn output pin, a square wave AC waveform can be generated with varying equivalent DC RMS values. As both the period and duty cycle of the PWM waveform can be controlled, the choice of generated waveform is extremely flexible. In the PWM mode, the CTnCCLR bit has no effect on the PWM operation. Both of the CCRA and CCRP registers are used to generate the PWM waveform, one register is used to clear the internal counter and thus control the PWM waveform frequency, while the other one is used to control the duty cycle. Which register is used to control either frequency or duty cycle is determined using the CTnDPX bit in the CTMnC1 register. The PWM waveform frequency and duty cycle can therefore be controlled by the values in the CCRA and CCRP registers. An interrupt flag, one for each of the CCRA and CCRP, will be generated when a compare match occurs from either Comparator A or Comparator P. The CTnOC bit in the CTMnC1 register is used to select the required polarity of the PWM waveform while the two CTnIO1 and CTnIO0 bits are used to enable the PWM output or to force the TM output pin to a fixed high or low level. The CTnPOL bit is used to reverse the polarity of the PWM output waveform. • 10-bit CTMn, PWM Mode, Edge-aligned Mode, CTnDPX=0 CCRP 001b 010b 011b 100b 101b 110b 111b 000b Period 128 256 384 512 640 768 896 1024 Duty CCRA If fSYS = 16MHz, CTMn clock source is fSYS/4, CCRP = 2 and CCRA = 128, The CTMn PWM output frequency = (fSYS/4) / 256 = fSYS / 1024 = 15.625kHz, duty = 128 / 256= 50%. If the Duty value defined by the CCRA register is equal to or greater than the Period value, then the PWM output duty is 100%. • 10-bit CTMn, PWM Mode, Edge-aligned Mode, CTnDPX=1 CCRP 001b 010b 011b 100b 128 256 384 512 110b 111b 000b 768 896 1024 CCRA Period Duty 101b 640 The PWM output period is determined by the CCRA register value together with the CTMn clock while the PWM duty cycle is defined by the CCRP register value. Rev. 1.10 96 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value CTnDPX = 0; CTnM [1:0] = 10 Counter cleared by CCRP Counter Reset when CTnON returns high CCRP Pause Resume CCRA Counter Stop if CTnON bit low Time CTnON CTnPAU CTnPOL CCRA Int. flag CTMnAF CCRP Int. flag CTMnPF CTMn O/P Pin (CTnOC=1) CTMn O/P Pin (CTnOC=0) PWM Duty Cycle set by CCRA PWM Period set by CCRP PWM resumes operation Output controlled by Output Inverts other pin-shared function when CTnPOL = 1 PWM Output Mode – CTnDXP = 0 Note: 1. Here CTnDPX = 0 – Counter cleared by CCRP 2. A counter clear sets PWM Period 3. The internal PWM function continues even when CTnIO1, CTnIO0 = 00 or 01 4. The CTnCCLR bit has no influence on PWM operation 5. n = 0 or 1 Rev. 1.10 97 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value CTnDPX = 1; CTnM [1:0] = 10 Counter cleared by CCRA Counter Reset when CTnON returns high CCRA Pause Resume CCRP Counter Stop if CTnON bit low Time CTnON CTnPAU CTnPOL CCRP Int. flag CTMnPF CCRA Int. flag CTMnAF CTMn O/P Pin (CTnOC=1) CTMn O/P Pin (CTnOC=0) PWM Duty Cycle set by CCRP PWM Period set by CCRA PWM resumes operation Output controlled by Output Inverts other pin-shared function when CTnPOL = 1 PWM Output Mode – CTnDXP = 1 Note: 1. Here CTnDPX = 1 – Counter cleared by CCRA 2. A counter clear sets PWM Period 3. The internal PWM function continues even when CTnIO [1:0] = 00 or 01 4. The CTnCCLR bit has no influence on PWM operation 5. n = 0 or 1 Rev. 1.10 98 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Standard Type TM – STM The Standard Type TM contains five operating modes, which are Compare Match Output, Timer/ Event Counter, Capture Input, Single Pulse Output and PWM Output modes. The Standard TM can also be controlled with two external input pins and can drive two external output pin. Device STM Core STM Input Pin STM Output Pin HT66F4360 HT66F4370 16-bit STM STCK, STPI STP, STPB CCRP 8-bit Comparator P fSYS/4 000 fSYS 001 fH/16 010 fH/64 011 fSUB 100 fSUB 101 110 STMPF Interrupt STOC b8~b15 16-bit Count-up Counter STON STPAU STCK2~STCK0 Counter Clear 16-bit Comparator A 0 1 STCCLR b0~b15 111 STCK Comparator P Match Comparator A Match Output Control Polarity Control Pin Control STM1, STM0 STIO1, STIO0 STPOL PxSn STP STPB STMAF Interrupt STIO1, STIO0 Edge Detector CCRA STPI Standard Type TM Block Diagram Standard TM Operation The size of Standard TM is 16-bit wide and its core is a 16-bit count-up counter which is driven by a user selectable internal or external clock source. There are also two internal comparators with the names, Comparator A and Comparator P. These comparators will compare the value in the counter with CCRP and CCRA registers. The CCRP comparator is 8-bit wide whose value is compared the with highest 8 bits in the counter while the CCRA is the sixteen bits and therefore compares all counter bits. The only way of changing the value of the 16-bit counter using the application program, is to clear the counter by changing the STON bit from low to high. The counter will also be cleared automatically by a counter overflow or a compare match with one of its associated comparators. When these conditions occur, a STM interrupt signal will also usually be generated. The Standard Type TM can operate in a number of different operational modes, can be driven by different clock sources including an input pin and can also control an output pin. All operating setup conditions are selected using relevant internal registers. Rev. 1.10 99 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Standard Type TM Register Description Overall operation of the Standard TM is controlled using a series of registers. A read only register pair exists to store the internal counter 16-bit value, while a read/write register pair exists to store the internal 16-bit CCRA value. The STMRP register is used to store the 8-bit CCRP value. The remaining two registers are control registers which setup the different operating and control modes. Bit Register Name 7 6 5 4 3 2 1 0 STMC0 STPAU STCK2 STCK1 STCK0 STON — — — STMC1 STM1 STM0 STIO1 STIO0 STOC STPOL STDPX STCCLR STMDL D7 D6 D5 D4 D3 D2 D1 D0 STMDH D15 D14 D13 D12 D11 D10 D9 D8 STMAL D7 D6 D5 D4 D3 D2 D1 D0 STMAH D15 D14 D13 D12 D11 D10 D9 D8 STMRP STRP7 STRP6 STRP5 STRP4 STRP3 STRP2 STRP1 STRP0 16-bit Standard TM Registers List STMDL Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R R R R R R R R POR 0 0 0 0 0 0 0 0 Bit 7~0 STM Counter Low Byte Register bit 7 ~ bit 0 STM 16-bit Counter bit 7 ~ bit 0 STMDH Register Bit 7 6 5 4 3 2 1 0 Name D15 D14 D13 D12 D11 D10 D9 D8 R/W R R R R R R R R POR 0 0 0 0 0 0 0 0 Bit 7~0 STM Counter High Byte Register bit 7 ~ bit 0 STM 16-bit Counter bit 15 ~ bit 8 STMAL Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0 STM CCRA Low Byte Register bit 7 ~ bit 0 STM 16-bit CCRA bit 7 ~ bit 0 STMAH Register Bit 7 6 5 4 3 2 1 0 Name D15 D14 D13 D12 D11 D10 D9 D8 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0 Rev. 1.10 STM CCRA High Byte Register bit 7 ~ bit 0 STM 16-bit CCRA bit 15 ~ bit 8 100 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU STMC0 Register Bit 7 6 5 4 3 2 1 0 Name STPAU STCK2 STCK1 STCK0 STON — — — R/W R/W R/W R/W R/W R/W — — — POR 0 0 0 0 0 — — — Bit 7STPAU: STM Counter Pause control 0: Run 1: Pause The counter can be paused by setting this bit high. Clearing the bit to zero restores normal counter operation. When in a Pause condition the STM will remain powered up and continue to consume power. The counter will retain its residual value when this bit changes from low to high and resume counting from this value when the bit changes to a low value again. Bit 6~4STCK2~STCK0: Select STM Counter clock 000: fSYS/4 001: fSYS 010: fH/16 011: fH/64 100: fSUB 101: fSUB 110: STCK rising edge clock 111: STCK falling edge clock These three bits are used to select the clock source for the STM. The external pin clock source can be chosen to be active on the rising or falling edge. The clock source fSYS is the system clock, while fH and fSUB are other internal clocks, the details of which can be found in the oscillator section. Bit 3STON: STM Counter On/Off control 0: Off 1: On This bit controls the overall on/off function of the STM. Setting the bit high enables the counter to run while clearing the bit disables the STM. Clearing this bit to zero will stop the counter from counting and turn off the STM which will reduce its power consumption. When the bit changes state from low to high the internal counter value will be reset to zero, however when the bit changes from high to low, the internal counter will retain its residual value until the bit returns high again. If the STM is in the Compare Match Output Mode then the STM output pin will be reset to its initial condition, as specified by the STOC bit, when the STON bit changes from low to high. Bit 2~0 Rev. 1.10 Unimplemented, read as “0” 101 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU STMC1 Register Bit 7 6 5 4 3 2 1 0 Name STM1 STM0 STIO1 STIO0 STOC STPOL STDPX STCCLR R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~6STM1~STM0: Select STM Operating Mode 00: Compare Match Output Mode 01: Capture Input Mode 10: PWM Mode or Single Pulse Output Mode 11: Timer/Counter Mode These bits setup the required operating mode for the STM. To ensure reliable operation the STM should be switched off before any changes are made to the STM1 and STM0 bits. In the Timer/Counter Mode, the STM output pin control will be disabled. Bit 5~4STIO1~STIO0: Select STM external pin (STP or STPI) function Compare Match Output Mode 00: No change 01: Output low 10: Output high 11: Toggle output PWM Output Mode/Single Pulse Output Mode 00: PWM output inactive state 01: PWM output active state 10: PWM output 11: Single Pulse Output Capture Input Mode 00: Input capture at rising edge of STPI 01: Input capture at falling edge of STPI 10: Input capture at rising/falling edge of STPI 11: Input capture disabled Timer/Counter Mode Unused These two bits are used to determine how the STM output pin changes state when a certain condition is reached. The function that these bits select depends upon in which mode the STM is running. In the Compare Match Output Mode, the STIO1 and STIO0 bits determine how the STM output pin changes state when a compare match occurs from the Comparator A. The TM output pin can be setup to switch high, switch low or to toggle its present state when a compare match occurs from the Comparator A. When the bits are both zero, then no change will take place on the output. The initial value of the STM output pin should be setup using the STOC bit in the STMC1 register. Note that the output level requested by the STIO1 and STIO0 bits must be different from the initial value setup using the STOC bit otherwise no change will occur on the STM output pin when a compare match occurs. After the STM output pin changes state, it can be reset to its initial level by changing the level of the STON bit from low to high. In the PWM Mode, the STIO1 and STIO0 bits determine how the STM output pin changes state when a certain compare match condition occurs. The PWM output function is modified by changing these two bits. It is necessary to only change the values of the STIO1 and STIO0 bits only after the STM has been switched off. Unpredictable PWM outputs will occur if the STIO1 and STIO0 bits are changed when the STM is running. Rev. 1.10 102 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 3STOC: STM STP Output control Compare Match Output Mode 0: Initial low 1: Initial high PWM Output Mode/Single Pulse Output Mode 0: Active low 1: Active high This is the output control bit for the STM output pin. Its operation depends upon whether STM is being used in the Compare Match Output Mode or in the PWM Mode/Single Pulse Output Mode. It has no effect if the STM is in the Timer/Counter Mode. In the Compare Match Output Mode it determines the logic level of the STM output pin before a compare match occurs. In the PWM Mode/Single Pulse Output Mode it determines if the PWM signal is active high or active low. Bit 2STPOL: STM STP Output polarity control 0: Non-inverted 1: Inverted This bit controls the polarity of the STP output pin. When the bit is set high the STM output pin will be inverted and not inverted when the bit is zero. It has no effect if the STM is in the Timer/Counter Mode. Bit 1STDPX: STM PWM duty/period control 0: CCRP – period; CCRA – duty 1: CCRP – duty; CCRA – period This bit determines which of the CCRA and CCRP registers are used for period and duty control of the PWM waveform. Bit 0STCCLR: STM Counter Clear condition selection 0: Comparator P match 1: Comparator A match This bit is used to select the method which clears the counter. Remember that the Standard TM contains two comparators, Comparator A and Comparator P, either of which can be selected to clear the internal counter. With the STCCLR bit set high, the counter will be cleared when a compare match occurs from the Comparator A. When the bit is low, the counter will be cleared when a compare match occurs from the Comparator P or with a counter overflow. A counter overflow clearing method can only be implemented if the CCRP bits are all cleared to zero. The STCCLR bit is not used in the PWM Output, Single Pulse Output or Capture Input Mode. Rev. 1.10 103 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU STMRP Register Bit 7 6 5 4 3 2 1 0 Name STRP7 STRP6 STRP5 STRP4 STRP3 STRP2 STRP1 STRP0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0STRP7~STRP0: STM CCRP 8-bit register, compared with the STM counter bit 15~bit 8 Comparator P match period = 0: 65536 STM clocks 1~255: (1~255) × 256 STM clocks These eight bits are used to setup the value on the internal CCRP 8-bit register, which are then compared with the internal counter’s highest eight bits. The result of this comparison can be selected to clear the internal counter if the STCCLR bit is set to zero. Setting the STCCLR bit to zero ensures that a compare match with the CCRP values will reset the internal counter. As the CCRP bits are only compared with the highest eight counter bits, the compare values exist in 256 clock cycle multiples. Clearing all eight bits to zero is in effect allowing the counter to overflow at its maximum value. Standard Type TM Operation Modes The Standard Type TM can operate in one of five operating modes, Compare Match Output Mode, PWM Output Mode, Single Pulse Output Mode, Capture Input Mode or Timer/Counter Mode. The operating mode is selected using the STM1 and STM0 bits in the STMC1 register. Compare Match Output Mode To select this mode, bits STM1 and STM0 in the STMC1 register, should be set to 00 respectively. In this mode once the counter is enabled and running it can be cleared by three methods. These are a counter overflow, a compare match from Comparator A and a compare match from Comparator P. When the STCCLR bit is low, there are two ways in which the counter can be cleared. One is when a compare match from Comparator P, the other is when the CCRP bits are all zero which allows the counter to overflow. Here both STMAF and STMPF interrupt request flags for Comparator A and Comparator P respectively, will both be generated. If the STCCLR bit in the STMC1 register is high then the counter will be cleared when a compare match occurs from Comparator A. However, here only the STMAF interrupt request flag will be generated even if the value of the CCRP bits is less than that of the CCRA registers. Therefore when STCCLR is high no STMPF interrupt request flag will be generated. In the Compare Match Output Mode, the CCRA can not be set to “0”. As the name of the mode suggests, after a comparison is made, the STM output pin, will change state. The STM output pin condition however only changes state when a STMAF interrupt request flag is generated after a compare match occurs from Comparator A. The STMPF interrupt request flag, generated from a compare match occurs from Comparator P, will have no effect on the STM output pin. The way in which the STM output pin changes state are determined by the condition of the STIO1 and STIO0 bits in the STMC1 register. The STM output pin can be selected using the STIO1 and STIO0 bits to go high, to go low or to toggle from its present condition when a compare match occurs from Comparator A. The initial condition of the STM output pin, which is setup after the STON bit changes from low to high, is setup using the STOC bit. Note that if the STIO1 and STIO0 bits are zero then no pin change will take place. Rev. 1.10 104 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value Counter overflow CCRP=0 0xFFFF STCCLR = 0; STM [1:0] = 00 CCRP > 0 Counter cleared by CCRP value CCRP > 0 Counter Restart Resume CCRP Pause CCRA Stop Time STON STPAU STPOL CCRP Int. flag STMPF CCRA Int. flag STMAF STM O/P Pin Output pin set to initial Level Low if STOC=0 Output not affected by STMAF flag. Remains High until reset by STON bit Output Toggle with STMAF flag Here STIO [1:0] = 11 Toggle Output select Note STIO [1:0] = 10 Active High Output select Output Inverts when STPOL is high Output Pin Reset to Initial value Output controlled by other pin-shared function Compare Match Output Mode – STCCLR = 0 Note: 1. With STCCLR=0 a Comparator P match will clear the counter 2. The STM output pin is controlled only by the STMAF flag 3. The output pin is reset to itsinitial state by a STON bit rising edge Rev. 1.10 105 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value STCCLR = 1; STM [1:0] = 00 CCRA = 0 Counter overflow CCRA > 0 Counter cleared by CCRA value 0xFFFF CCRA=0 Resume CCRA Pause Stop Counter Restart CCRP Time STON STPAU STPOL No STMAF flag generated on CCRA overflow CCRA Int. flag STMAF CCRP Int. flag STMPF STM O/P Pin STMPF not generated Output pin set to initial Level Low if STOC=0 Output does not change Output Toggle with STMAF flag Here STIO [1:0] = 11 Toggle Output select Output not affected by STMAF flag. Remains High until reset by STON bit Note STIO [1:0] = 10 Active High Output select Output Inverts when STPOL is high Output Pin Reset to Initial value Output controlled by other pin-shared function Compare Match Output Mode –STCCLR = 1 Note: 1. With STCCLR=1 a Comparator A match will clear the counter 2. The STM output pin is controlled only by the STMAF flag 3. The output pin is reset to its initial state by a STON bit rising edge 4. A STMPF flag is not generated when STCCLR=1 Rev. 1.10 106 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Timer/Counter Mode To select this mode, bits STM1 and STM0 in the STMC1 register should be set to 11 respectively. The Timer/Counter Mode operates in an identical way to the Compare Match Output Mode generating the same interrupt flags. The exception is that in the Timer/Counter Mode the STM output pin is not used. Therefore the above description and Timing Diagrams for the Compare Match Output Mode can be used to understand its function. As the STM output pin is not used in this mode, the pin can be used as a normal I/O pin or other pin-shared function. PWM Output Mode To select this mode, bits STM1 and STM0 in the STMC1 register should be set to 10 respectively and also the STIO1 and STIO0 bits should be set to 10 respectively. The PWM function within the STM is useful for applications which require functions such as motor control, heating control, illumination control etc. By providing a signal of fixed frequency but of varying duty cycle on the STM output pin, a square wave AC waveform can be generated with varying equivalent DC RMS values. As both the period and duty cycle of the PWM waveform can be controlled, the choice of generated waveform is extremely flexible. In the PWM mode, the STCCLR bit has no effect as the PWM period. Both of the CCRA and CCRP registers are used to generate the PWM waveform, one register is used to clear the internal counter and thus control the PWM waveform frequency, while the other one is used to control the duty cycle. Which register is used to control either frequency or duty cycle is determined using the STDPX bit in the STMC1 register. The PWM waveform frequency and duty cycle can therefore be controlled by the values in the CCRA and CCRP registers. An interrupt flag, one for each of the CCRA and CCRP, will be generated when a compare match occurs from either Comparator A or Comparator P. The STOC bit in the STMC1 register is used to select the required polarity of the PWM waveform while the two STIO1 and STIO0 bits are used to enable the PWM output or to force the STM output pin to a fixed high or low level. The STPOL bit is used to reverse the polarity of the PWM output waveform. • 16-bit STM, PWM Mode, Edge-aligned Mode, STDPX=0 CCRP 1~255 0 Period CCRP×256 65536 Duty CCRA If fSYS = 16MHz, STM clock source is fSYS/4, CCRP = 2 and CCRA = 128, The STM PWM output frequency=(fSYS/4)/(2×256)=fSYS/2048=7.8125kHz, duty=128/(2×256)= 25%. If the Duty value defined by the CCRA register is equal to or greater than the Period value, then the PWM output duty is 100%. • 16-bit STM, PWM Mode, Edge-aligned Mode, STDPX=1 CCRP 1~255 CCRA Period Duty 0 CCRP×256 65536 The PWM output period is determined by the CCRA register value together with the TM clock while the PWM duty cycle is defined by the CCRP register value except when the CCRP value is equal to 0. Rev. 1.10 107 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value STDPX = 0; STM [1:0] = 10 Counter cleared by CCRP Counter Reset when STON returns high CCRP Pause Resume CCRA Counter Stop if STON bit low Time STON STPAU STPOL CCRA Int. flag STMAF CCRP Int. flag STMPF STM O/P Pin (STOC=1) STM O/P Pin (STOC=0) PWM Duty Cycle set by CCRA PWM Period set by CCRP PWM resumes operation Output controlled by Output Inverts other pin-shared function when STPOL = 1 PWM Output Mode – STDXP = 0 Note: 1. Here STDPX=0 – Counter cleared by CCRP 2. A counter clear sets the PWM Period 3. The internal PWM function continues running even when STIO [1:0] = 00 or 01 4. The STCCLR bit has no influence on PWM operation Rev. 1.10 108 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value STDPX = 1; STM [1:0] = 10 Counter cleared by CCRA Counter Reset when STON returns high CCRA Pause Resume CCRP Counter Stop if STON bit low Time STON STPAU STPOL CCRP Int. flag STMPF CCRA Int. flag STMAF STM O/P Pin (STOC=1) STM O/P Pin (STOC=0) PWM Duty Cycle set by CCRP PWM Period set by CCRA PWM resumes operation Output controlled by Output Inverts other pin-shared function when STPOL = 1 PWM Output Mode – STDXP = 1 Note: 1. Here STDPX=1 – Counter cleared by CCRA 2. A counter clear sets the PWM Period 3. The internal PWM function continues even when STIO [1:0] = 00 or 01 4. The STCCLR bit has no influence on PWM operation Rev. 1.10 109 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Single Pulse Output Mode To select this mode, bits STM1 and STM0 in the STMC1 register should be set to 10 respectively and also the STIO1 and STIO0 bits should be set to 11 respectively. The Single Pulse Output Mode, as the name suggests, will generate a single shot pulse on the STM output pin. The trigger for the pulse output leading edge is a low to high transition of the STON bit, which can be implemented using the application program. However in the Single Pulse Mode, the STON bit can also be made to automatically change from low to high using the external STCK pin, which will in turn initiate the Single Pulse output. When the STON bit transitions to a high level, the counter will start running and the pulse leading edge will be generated. The STON bit should remain high when the pulse is in its active state. The generated pulse trailing edge will be generated when the STON bit is cleared to zero, which can be implemented using the application program or when a compare match occurs from Comparator A. However a compare match from Comparator A will also automatically clear the STON bit and thus generate the Single Pulse output trailing edge. In this way the CCRA value can be used to control the pulse width. A compare match from Comparator A will also generate a STM interrupt. The counter can only be reset back to zero when the STON bit changes from low to high when the counter restarts. In the Single Pulse Mode CCRP is not used. The STCCLR and STDPX bits are not used in this Mode. S/W Command SET“STON” or STCK Pin Transition CCRA Leading Edge CCRA Trailing Edge STON bit 0→1 STON bit 1→0 S/W Command CLR“STON” or CCRA Compare Match STP Output Pin Pulse Width = CCRA Value Single Pulse Generation Rev. 1.10 110 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value STM [1:0] = 10 ; STIO [1:0] = 11 Counter stopped by CCRA Counter Reset when STON returns high CCRA Pause Counter Stops by software Resume CCRP Time STON Software Trigger Auto. set by STCK pin Cleared by CCRA match STCK pin Software Trigger Software Trigger Software Clear Software Trigger STCK pin Trigger STPAU STPOL No CCRP Interrupts generated CCRP Int. Flag STMPF CCRA Int. Flag STMAF STM O/P Pin (STOC=1) STM O/P Pin (STOC=0) Output Inverts when STPOL = 1 Pulse Width set by CCRA Single Pulse Mode Note: 1. Counter stopped by CCRA 2. CCRP is not used 3. The pulse triggered by the STCK pin or by setting the STON bit high 4. A STCK pin active edge will automatically set the STON bit high. 5. In the Single Pulse Mode, STIO [1:0] must be set to “11” and can not be changed. Rev. 1.10 111 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Capture Input Mode To select this mode bits STM1 and STM0 in the STMC1 register should be set to 01 respectively. This mode enables external signals to capture and store the present value of the internal counter and can therefore be used for applications such as pulse width measurements. The external signal is supplied on the STPI pin, whose active edge can be a rising edge, a falling edge or both rising and falling edges; the active edge transition type is selected using the STIO1 and STIO0 bits in the STMC1 register. The counter is started when the STON bit changes from low to high which is initiated using the application program. When the required edge transition appears on the STPI pin the present value in the counter will be latched into the CCRA registers and a STM interrupt generated. Irrespective of what events occur on the STPI pin the counter will continue to free run until the STON bit changes from high to low. When a CCRP compare match occurs the counter will reset back to zero; in this way the CCRP value can be used to control the maximum counter value. When a CCRP compare match occurs from Comparator P, a STM interrupt will also be generated. Counting the number of overflow interrupt signals from the CCRP can be a useful method in measuring long pulse widths. The STIO1 and STIO0 bits can select the active trigger edge on the STPI pin to be a rising edge, falling edge or both edge types. If the STIO1 and STIO0 bits are both set high, then no capture operation will take place irrespective of what happens on the STPI pin, however it must be noted that the counter will continue to run. The STCCLR and STDPX bits are not used in this Mode. Rev. 1.10 112 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value STM [1:0] = 01 Counter cleared by CCRP Counter Counter Stop Reset CCRP YY Pause Resume XX Time STON STPAU Active edge Active edge Active edge STM capture pin STPI CCRA Int. Flag STMAF CCRP Int. Flag STMPF CCRA Value STIO [1:0] Value XX 00 – Rising edge YY 01 – Falling edge XX 10 – Both edges YY 11 – Disable Capture Capture Input Mode Note: 1. STM [1:0] = 01 and active edge set by the STIO [1:0] bits 2. A STM Capture input pin active edge transfers the counter value to CCRA 3. STCCLR bit not used 4. No output function -- STOC and STPOL bits are not used 5. CCRP determines the counter value and the counter has a maximum count value when CCRP is equal to zero. Rev. 1.10 113 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Periodic Type TM – PTM The Periodic Type TM contains five operating modes, which are Compare Match Output, Timer/ Event Counter, Capture Input, Single Pulse Output and PWM Output modes. The Periodic TM can also be controlled with two external input pins and can drive two external output pin. Device PTM Core PTM Input Pin PTM Output Pin HT66F4360 HT66F4370 10-bit PTM PTCK, PTPI PTP, PTPB CCRP 000 001 010 011 100 101 110 111 fSYS/4 fSYS fH/16 fH/64 fSUB fSUB PTCK 10-bit Comparator P Comparator P Match PTMPF Interr�pt PTOC b0~b9 10-bit Co�nt-�p Co�nter PTON PTP�U PTCK�~PTCK0 Co�nter Clear PTCCLR b0~b9 10-bit Comparator � O�tp�t Control 0 1 PTM1� PTM0 PTIO1� PTIO0 Comparator � Match PTIO1� PTIO0 PTC�PTS Ed�e Detector 0 1 CCR� Polarity Control Pin Control PTPOL PxSn PTP PTPB PTM�F Interr�pt PxSn Pin Control PTPI Periodic Type TM Block Diagram Periodic TM Operation The size of Periodic TM is 10-bit wide and its core is a 10-bit count-up counter which is driven by a user selectable internal or external clock source. There are also two internal comparators with the names, Comparator A and Comparator P. These comparators will compare the value in the counter with CCRP and CCRA registers. The CCRP and CCRA comparators are 10-bit wide whose value is respectively compared with all counter bits. The only way of changing the value of the 10-bit counter using the application program is to clear the counter by changing the PTON bit from low to high. The counter will also be cleared automatically by a counter overflow or a compare match with one of its associated comparators. When these conditions occur, a PTM interrupt signal will also usually be generated. The Periodic Type TM can operate in a number of different operational modes, can be driven by different clock sources including an input pin and can also control the output pins. All operating setup conditions are selected using relevant internal registers. Rev. 1.10 114 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Periodic Type TM Register Description Overall operation of the Periodic TM is controlled using a series of registers. A read only register pair exists to store the internal counter 10-bit value, while two read/write register pairs exist to store the internal 10-bit CCRA and CCRP value. The remaining two registers are control registers which setup the different operating and control modes. Bit Register Name 7 6 5 4 3 2 1 0 PTMC0 PTPAU PTCK2 PTCK1 PTCK0 PTON — — — PTMC1 PTM1 PTM0 PTIO1 PTIO0 PTOC PTPOL PTMDL D7 D6 D5 D4 D3 D2 D1 D0 PTMDH — — — — — — D9 D8 PTMAL D7 D6 D5 D4 D3 D2 D1 D0 PTCAPTS PTCCLR PTMAH — — — — — — D9 D8 PTMRPL PTRP7 PTRP6 PTRP5 PTRP4 PTRP3 PTRP2 PTRP1 PTRP0 PTMRPH — — — — — — PTRP9 PTRP8 Periodic TM Registers List PTMDL Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R R R R R R R R POR 0 0 0 0 0 0 0 0 3 2 1 0 Bit 7~0 PTM Counter Low Byte Register bit 7 ~ bit 0 PTM 10-bit Counter bit 7 ~ bit 0 PTMDH Register Bit 7 6 5 4 Name — — — — — — D9 D8 R/W — — — — — — R R POR — — — — — — 0 0 3 2 1 0 Bit 7~2 Unimplemented, read as “0” Bit 1~0 PTM Counter High Byte Register bit 1 ~ bit 0 PTM 10-bit Counter bit 9 ~ bit 8 PTMAL Register Bit 6 5 4 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0 Rev. 1.10 7 PTM CCRA Low Byte Register bit 7 ~ bit 0 PTM 10-bit CCRA bit 7 ~ bit 0 115 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU PTMAH Register Bit 7 6 5 4 3 2 1 0 Name — — — — — — D9 D8 R/W — — — — — — R/W R/W POR — — — — — — 0 0 Bit 7~2 Unimplemented, read as “0” Bit 1~0 PTM CCRA High Byte Register bit 1 ~ bit 0 PTM 10-bit CCRA bit 9 ~ bit 8 PTMRPL Register Bit 7 6 5 4 3 2 1 0 Name PTRP7 PTRP6 PTRP5 PTRP4 PTRP3 PTRP2 PTRP1 PTRP0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0PTRP7~PTRP0: PTM CCRP Low Byte Register bit 7 ~ bit 0 PTM 10-bit CCRP bit 7 ~ bit 0 PTMRPH Register Bit 7 6 5 4 3 2 1 0 Name — — — — — — PTRP9 PTRP8 R/W — — — — — — R/W R/W POR — — — — — — 0 0 1 0 Bit 7~2 Unimplemented, read as “0” Bit 1~0PTRP9~PTRP8: PTM CCRP High Byte Register bit 1 ~ bit 0 PTM 10-bit CCRP bit 9 ~ bit 8 PTMC0 Register Bit 7 6 5 4 3 2 Name PTPAU PTCK2 PTCK1 PTCK0 PTON — — — R/W R/W R/W R/W R/W R/W — — — POR 0 0 0 0 0 — — — Bit 7PTPAU: PTM Counter Pause control 0: Run 1: Pause The counter can be paused by setting this bit high. Clearing the bit to zero restores normal counter operation. When in a Pause condition the PTM will remain powered up and continue to consume power. The counter will retain its residual value when this bit changes from low to high and resume counting from this value when the bit changes to a low value again. Bit 6~4PTCK2~PTCK0: Select PTM Counter clock 000: fSYS/4 001: fSYS 010: fH/16 011: fH/64 100: fSUB 101: fSUB 110: PTCK rising edge clock 111: PTCK falling edge clock Rev. 1.10 116 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU These three bits are used to select the clock source for the PTM. The external pin clock source can be chosen to be active on the rising or falling edge. The clock source fSYS is the system clock, while fH and fSUB are other internal clocks, the details of which can be found in the oscillator section. Bit 3PTON: PTM Counter On/Off control 0: Off 1: On This bit controls the overall on/off function of the PTM. Setting the bit high enables the counter to run while clearing the bit disables the PTM. Clearing this bit to zero will stop the counter from counting and turn off the PTM which will reduce its power consumption. When the bit changes state from low to high the internal counter value will be reset to zero, however when the bit changes from high to low, the internal counter will retain its residual value until the bit returns high again. If the PTM is in the Compare Match Output Mode then the PTM output pin will be reset to its initial condition, as specified by the PTOC bit, when the PTON bit changes from low to high. Bit 2~0 Unimplemented, read as “0” PTMC1 Register Bit 7 6 5 4 3 2 Name PTM1 PTM0 PTIO1 PTIO0 PTOC PTPOL 1 0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 PTCAPTS PTCCLR Bit 7~6PTM1~PTM0: Select PTM Operating Mode 00: Compare Match Output Mode 01: Capture Input Mode 10: PWM Mode or Single Pulse Output Mode 11: Timer/Counter Mode These bits setup the required operating mode for the PTM. To ensure reliable operation the PTM should be switched off before any changes are made to the PTM1 and PTM0 bits. In the Timer/Counter Mode, the PTM output pin control will be disabled. Bit 5~4PTIO1~PTIO0: Select PTM external pin PTP or PTPI function Compare Match Output Mode 00: No change 01: Output low 10: Output high 11: Toggle output PWM Output Mode/Single Pulse Output Mode 00: PWM output inactive state 01: PWM output active state 10: PWM output 11: Single Pulse Output Capture Input Mode 00: Input capture at rising edge of PTPI or PTCK 01: Input capture at falling edge of PTPI or PTCK 10: Input capture at rising/falling edge of PTPI or PTCK 11: Input capture disabled Timer/Counter Mode Unused These two bits are used to determine how the PTM output pin changes state when a certain condition is reached. The function that these bits select depends upon in which mode the PTM is running. In the Compare Match Output Mode, the PTIO1 and PTIO0 bits determine how the PTM output pin changes state when a compare match occurs from the Comparator A. Rev. 1.10 117 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU The PTM output pin can be setup to switch high, switch low or to toggle its present state when a compare match occurs from the Comparator A. When the bits are both zero, then no change will take place on the output. The initial value of the PTM output pin should be setup using the PTOC bit in the PTMC1 register. Note that the output level requested by the PTIO1 and PTIO0 bits must be different from the initial value setup using the PTOC bit otherwise no change will occur on the PTM output pin when a compare match occurs. After the PTM output pin changes state, it can be reset to its initial level by changing the level of the PTON bit from low to high. In the PWM Mode, the PTIO1 and PTIO0 bits determine how the TM output pin changes state when a certain compare match condition occurs. The PTM output function is modified by changing these two bits. It is necessary to only change the values of the PTIO1 and PTIO0 bits only after the PTM has been switched off. Unpredictable PWM outputs will occur if the PTIO1 and PTIO0 bits are changed when the PTM is running. Bit 3PTOC: PTM PTP Output control Compare Match Output Mode 0: Initial low 1: Initial high PWM Output Mode/Single Pulse Output Mode 0: Active low 1: Active high This is the output control bit for the PTM output pin. Its operation depends upon whether PTM is being used in the Compare Match Output Mode or in the PWM Mode/Single Pulse Output Mode. It has no effect if the PTM is in the Timer/Counter Mode. In the Compare Match Output Mode it determines the logic level of the PTM output pin before a compare match occurs. In the PWM Mode/Single Pulse Output Mode it determines if the PWM signal is active high or active low. Bit 2PTPOL: PTM PTP Output polarity control 0: Non-inverted 1: Inverted This bit controls the polarity of the PTP output pin. When the bit is set high the PTM output pin will be inverted and not inverted when the bit is zero. It has no effect if the PTM is in the Timer/Counter Mode. Bit 1PTCAPTS: PTM Capture Triiger Source selection 0: From PTPI pin 1: From PTCK pin Bit 0PTCCLR: PTM Counter Clear condition selection 0: Comparator P match 1: Comparator A match This bit is used to select the method which clears the counter. Remember that the Periodic TM contains two comparators, Comparator A and Comparator P, either of which can be selected to clear the internal counter. With the PTCCLR bit set high, the counter will be cleared when a compare match occurs from the Comparator A. When the bit is low, the counter will be cleared when a compare match occurs from the Comparator P or with a counter overflow. A counter overflow clearing method can only be implemented if the CCRP bits are all cleared to zero. The PTCCLR bit is not used in the PWM Output, Single Pulse Output or Capture Input Mode. Rev. 1.10 118 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Periodic Type TM Operation Modes The Periodic Type TM can operate in one of five operating modes, Compare Match Output Mode, PWM Output Mode, Single Pulse Output Mode, Capture Input Mode or Timer/Counter Mode. The operating mode is selected using the PTM1 and PTM0 bits in the PTMC1 register. Compare Match Output Mode To select this mode, bits PTM1 and PTM0 in the PTMC1 register, should be set to 00 respectively. In this mode once the counter is enabled and running it can be cleared by three methods. These are a counter overflow, a compare match from Comparator A and a compare match from Comparator P. When the PTCCLR bit is low, there are two ways in which the counter can be cleared. One is when a compare match from Comparator P, the other is when the CCRP bits are all zero which allows the counter to overflow. Here both PTMAF and PTMPF interrupt request flags for Comparator A and Comparator P respectively, will both be generated. If the PTCCLR bit in the PTMC1 register is high then the counter will be cleared when a compare match occurs from Comparator A. However, here only the PTMAF interrupt request flag will be generated even if the value of the CCRP bits is less than that of the CCRA registers. Therefore when PTCCLR is high no PTMPF interrupt request flag will be generated. In the Compare Match Output Mode, the CCRA can not be set to “0”. As the name of the mode suggests, after a comparison is made, the PTM output pin will change state. The PTM output pin condition however only changes state when a PTMAF interrupt request flag is generated after a compare match occurs from Comparator A. The PTMPF interrupt request flag, generated from a compare match occurs from Comparator P, will have no effect on the PTM output pin. The way in which the PTM output pin changes state are determined by the condition of the PTIO1 and PTIO0 bits in the PTMC1 register. The PTM output pin can be selected using the PTIO1 and PTIO0 bits to go high, to go low or to toggle from its present condition when a compare match occurs from Comparator A. The initial condition of the PTM output pin, which is setup after the PTON bit changes from low to high, is setup using the PTOC bit. Note that if the PTIO1 and PTIO0 bits are zero then no pin change will take place. Rev. 1.10 119 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value Counter overflow CCRP=0 0x3FF PTCCLR = 0; PTM [1:0] = 00 CCRP > 0 Counter cleared by CCRP value CCRP > 0 Counter Restart Resume CCRP Pause CCRA Stop Time PTON PTPAU PTPOL CCRP Int. Flag PTMPF CCRA Int. Flag PTMAF PTM O/P Pin Output pin set to initial Level Low if PTOC=0 Output not affected by PTMAF flag. Remains High until reset by PTON bit Output Toggle with PTMAF flag Here PTIO [1:0] = 11 Toggle Output select Note PTIO [1:0] = 10 Active High Output select Output Inverts when PTPOL is high Output Pin Reset to Initial value Output controlled by other pin-shared function Compare Match Output Mode – PTCCLR = 0 Note: 1. With PTCCLR=0, a Comparator P match will clear the counter 2. The PTM output pin is controlled only by the PTMAF flag 3. The output pin is reset to its initial state by a PTON bit rising edge Rev. 1.10 120 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value PTCCLR = 1; PTM [1:0] = 00 CCRA = 0 Counter overflow CCRA > 0 Counter cleared by CCRA value 0x3FF CCRA=0 Resume CCRA Pause Stop Counter Restart CCRP Time PTON PTPAU PTPOL No PTMAF flag generated on CCRA overflow CCRA Int. Flag PTMAF CCRP Int. Flag PTMPF PTM O/P Pin PTMPF not generated Output pin set to initial Level Low if PTOC=0 Output does not change Output Toggle with PTMAF flag Here PTIO [1:0] = 11 Toggle Output select Output not affected by PTMAF flag. Remains High until reset by PTON bit Note PTIO [1:0] = 10 Active High Output select Output Inverts when PTPOL is high Output Pin Reset to Initial value Output controlled by other pin-shared function Compare Match Output Mode – PTCCLR = 1 Note: 1. With PTCCLR=1, a Comparator A match will clear the counter 2. The PTM output pin is controlled only by the PTMAF flag 3. The output pin is reset to its initial state by a PTON bit rising edge 4. A PTMPF flag is not generated when PTCCLR =1 Rev. 1.10 121 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Timer/Counter Mode To select this mode, bits PTM1 and PTM0 in the PTMC1 register should be set to 11 respectively. The Timer/Counter Mode operates in an identical way to the Compare Match Output Mode generating the same interrupt flags. The exception is that in the Timer/Counter Mode the PTM output pin is not used. Therefore the above description and Timing Diagrams for the Compare Match Output Mode can be used to understand its function. As the PTM output pin is not used in this mode, the pin can be used as a normal I/O pin or other pin-shared function. PWM Output Mode To select this mode, bits PTM1 and PTM0 in the PTMC1 register should be set to 10 respectively and also the PTIO1 and PTIO0 bits should be set to 10 respectively. The PWM function within the PTM is useful for applications which require functions such as motor control, heating control, illumination control, etc. By providing a signal of fixed frequency but of varying duty cycle on the PTM output pin, a square wave AC waveform can be generated with varying equivalent DC RMS values. As both the period and duty cycle of the PWM waveform can be controlled, the choice of generated waveform is extremely flexible. In the PWM mode, the PTCCLR bit has no effect as the PWM period. Both of the CCRP and CCRA registers are used to generate the PWM waveform, one register is used to clear the internal counter and thus control the PWM waveform frequency, while the other one is used to control the duty cycle. The PWM waveform frequency and duty cycle can therefore be controlled by the values in the CCRA and CCRP registers. An interrupt flag, one for each of the CCRA and CCRP, will be generated when a compare match occurs from either Comparator A or Comparator P. The PTOC bit in the PTMC1 register is used to select the required polarity of the PWM waveform while the two PTIO1 and PTIO0 bits are used to enable the PWM output or to force the PTM output pin to a fixed high or low level. The PTPOL bit is used to reverse the polarity of the PWM output waveform. • 10-bit PTM, PWM Mode, Period Duty CCRP = 0 CCRP = 1~1023 1024 1~1023 CCRA If fSYS=16MHz, TM clock source select fSYS/4, CCRP=512 and CCRA=128, The PTM PWM output frequency = (fSYS/4)/512 = fSYS/2048 = 7.8125kHz, duty=128/512=25%, If the Duty value defined by the CCRA register is equal to or greater than the Period value, then the PWM output duty is 100%. Rev. 1.10 122 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value PTM [1:0] = 10 Counter cleared by CCRP Counter Reset when PTON returns high CCRP Pause Resume CCRA Counter Stop if PTON bit low Time PTON PTPAU PTPOL CCRA Int. Flag PTMAF CCRP Int. Flag PTMPF PTM O/P Pin (PTOC=1) PTM O/P Pin (PTOC=0) PWM Duty Cycle set by CCRA PWM Period set by CCRP PWM resumes operation Output controlled by Output Inverts other pin-shared function When PTPOL = 1 PWM Mode Note: 1. The counter is cleared by CCRP. 2. A counter clear sets the PWM Period 3. The internal PWM function continues running even when PTIO [1:0] = 00 or 01 4. The PTCCLR bit has no influence on PWM operation Rev. 1.10 123 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Single Pulse Output Mode To select this mode, bits PTM1 and PTM0 in the PTMC1 register should be set to 10 respectively and also the PTIO1 and PTIO0 bits should be set to 11 respectively. The Single Pulse Output Mode, as the name suggests, will generate a single shot pulse on the PTM output pin. The trigger for the pulse output leading edge is a low to high transition of the PTON bit, which can be implemented using the application program. However in the Single Pulse Mode, the PTON bit can also be made to automatically change from low to high using the external PTCK pin, which will in turn initiate the Single Pulse output. When the PTON bit transitions to a high level, the counter will start running and the pulse leading edge will be generated. The PTON bit should remain high when the pulse is in its active state. The generated pulse trailing edge will be generated when the PTON bit is cleared to zero, which can be implemented using the application program or when a compare match occurs from Comparator A. However a compare match from Comparator A will also automatically clear the PTON bit and thus generate the Single Pulse output trailing edge. In this way the CCRA value can be used to control the pulse width. A compare match from Comparator A will also generate a PTM interrupt. The counter can only be reset back to zero when the PTON bit changes from low to high when the counter restarts. In the Single Pulse Mode CCRP is not used. The PTCCLR is not used in this Mode. S/W Command SET“PTON” or PTCK Pin Transition CCRA Leading Edge CCRA Trailing Edge PTON bit 1 0 PTON bit 0 1 S/W Command CLR“PTON” or CCRA Compare Match PTP Output Pin Pulse Width = CCRA Value Single Pulse Generation Rev. 1.10 124 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value PTM [1:0] = 10 ; PTIO [1:0] = 11 Counter stopped by CCRA Counter Reset when PTON returns high CCRA Pause Counter Stops by software Resume CCRP Time PTON Software Trigger Auto. set by PTCK pin Cleared by CCRA match PTCK pin Software Trigger Software Trigger Software Clear Software Trigger PTCK pin Trigger PTPAU PTPOL No CCRP Interrupts generated CCRP Int. Flag PTMPF CCRA Int. Flag PTMAF PTM O/P Pin (PTOC=1) PTM O/P Pin (PTOC=0) Pulse Width set by CCRA Output Inverts when PTPOL = 1 Single Pulse Mode Note: 1. Counter stopped by CCRA 2. CCRP is not used 3. The pulse triggered by the PTCK pin or by setting the PTON bit high 4. A PTCK pin active edge will automatically set the PTON bit high. 5. In the Single Pulse Mode, PTIO [1:0] must be set to “11” and can not be changed. Rev. 1.10 125 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Capture Input Mode To select this mode bits PTM1 and PTM0 in the PTMC1 register should be set to 01 respectively. This mode enables external signals to capture and store the present value of the internal counter and can therefore be used for applications such as pulse width measurements. The external signal is supplied on the PTPI or PTCK pin, selected by the PTCAPTS bit in the PTMC1 register. The input pin active edge can be either a rising edge, a falling edge or both rising and falling edges; the active edge transition type is selected using the PTIO1 and PTIO0 bits in the PTMC1 register. The counter is started when the PTON bit changes from low to high which is initiated using the application program. When the required edge transition appears on the PTPI or PTCK pin the present value in the counter will be latched into the CCRA registers and a PTM interrupt generated. Irrespective of what events occur on the PTPI or PTCK pin the counter will continue to free run until the PTON bit changes from high to low. When a CCRP compare match occurs the counter will reset back to zero; in this way the CCRP value can be used to control the maximum counter value. When a CCRP compare match occurs from Comparator P, a PTM interrupt will also be generated. Counting the number of overflow interrupt signals from the CCRP can be a useful method in measuring long pulse widths. The PTIO1 and PTIO0 bits can select the active trigger edge on the PTPI or PTCK pin to be a rising edge, falling edge or both edge types. If the PTIO1 and PTIO0 bits are both set high, then no capture operation will take place irrespective of what happens on the PTPI or PTCK pin, however it must be noted that the counter will continue to run. As the PTPI or PTCK pin is pin shared with other functions, care must be taken if the PTM is in the Input Capture Mode. This is because if the pin is setup as an output, then any transitions on this pin may cause an input capture operation to be executed. The PTCCLR, PTOC and PTPOL bits are not used in this Mode. Rev. 1.10 126 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Counter Value PTM [1:0] = 01 Counter cleared by CCRP Counter Counter Stop Reset CCRP YY Pause Resume XX Time PTON PTPAU Active edge Active edge Active edge PTM capture pin PTPI or PTCK CCRA Int. Flag PTMAF CCRP Int. Flag PTMPF CCRA Value PTIO [1:0] Value XX 00 – Rising edge YY 01 – Falling edge XX 10 – Both edges YY 11 – Disable Capture Capture Input Mode Note: 1. PTM [1:0] = 01 and active edge set by the PTIO [1:0] bits 2. A PTM Capture input pin active edge transfers the counter value to CCRA 3. PTCCLR bit not used 4. No output function – PTOC and PTPOL bits are not used 5. CCRP determines the counter value and the counter has a maximum count value when CCRP is equal to zero. Rev. 1.10 127 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Analog to Digital Converter The need to interface to real world analog signals is a common requirement for many electronic systems. However, to properly process these signals by a microcontroller, they must first be converted into digital signals by A/D converters. By integrating the A/D conversion electronic circuitry into the microcontroller, the need for external components is reduced significantly with the corresponding follow-on benefits of lower costs and reduced component space requirements. A/D Overview These devices contain a multi-channel analog to digital converter which can directly interface to external analog signals, such as that from sensors or other control signals and convert these signals directly into a 12-bit digital value. It also can convert the internal signals, Bandgap reference voltage VBG, into a 12-bit digital value. The external or internal analog signal to be converted is determined by the SAINS2~SAINS0 bits together with the SACS3~SACS0 bits. When the external analog signal is to be converted, the corresponding pin-shared control bits should first be properly configured and then desired external channel input should be selected using the SAINS2~SAINS0 and SACS3~SACS0 bits. Note that when the internal analog signal is to be converted, the pin-shared control bits should also be properly configured except the SAINS and SACS bit fields. More detailed information about the A/D input signal is described in the “A/D Converter Control Registers” and “A/D Converter Input Signals” sections respectively. Device External Input Channels Internal Signal A/D Channel Select Bits HT66F4360 HT66F4370 8: AN0~AN7 1: VBG SAINS2~SAINS0; SACS3~SACS0 The accompanying block diagram shows the internal structure of the A/D converter with temperature sensor together with its associated registers and control bits. AVDD fSYS Pin-shared Control bits SACKS2~SACKS0 ÷ 2N (N=0~7) SACS3~SACS0 VREF SAVRS1~SAVRS0 ADCEN A/D Clock AN0 AN1 ADRFS SADOL A/D Converter SADOH A/D Data Registers AN7 VBG START ADBZ ADCEN VSS SAINS2~SAINS0 A/D Converter Structure Rev. 1.10 128 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Registers Descriptions Overall operation of the A/D converter is controlled using four registers. A read only register pair exists to store the A/D Converter data 12-bit value. Two registers, SADC0 and SADC1, are the control registers which setup the operating and control function of the A/D converter. Bit Register Name 7 6 5 4 3 SADOL (ADRFS=0) D3 D2 D1 D0 — — — — SADOL (ADRFS=1) D7 D6 D5 D4 D3 D2 D1 D0 SADOH (ADRFS=0) D11 D10 D9 D8 D7 D6 D5 D4 SADOH (ADRFS=1) — — — — D11 D10 D9 D8 SADC0 START ADBZ SACS3 SACS2 SACS1 SACS0 SADC1 SAINS2 SAINS1 SAINS0 SAVRS1 SAVRS0 SACKS2 SACKS1 SACKS0 ADCEN ADRFS 2 1 0 A/D Converter Registers List A/D Converter Data Registers – SADOL, SADOH As these devices contain an internal 12-bit A/D converter, it requires two data registers to store the converted value. These are a high byte register, known as SADOH, and a low byte register, known as SADOL. After the conversion process takes place, these registers can be directly read by the microcontroller to obtain the digitised conversion value. As only 12 bits of the 16-bit register space is utilised, the format in which the data is stored is controlled by the ADRFS bit in the SADC0 register as shown in the accompanying table. D0~D11 are the A/D conversion result data bits. Any unused bits will be read as zero. Note that A/D data registers contents will be unchanged if the A/D converter is disabled. ADRFS 0 1 SADOH 7 6 D11 D10 0 0 5 4 D9 D8 0 0 SADOL 3 2 1 0 D7 D6 D5 D4 D11 D10 D9 D8 7 6 5 4 3 2 1 0 D3 D2 D1 D0 0 0 0 0 D7 D6 D5 D4 D3 D2 D1 D0 A/D Converter Data Registers A/D Converter Control Registers – SADC0, SADC1 To control the function and operation of the A/D converter, three control registers known as SADC0 and SADC1 are provided. These 8-bit registers define functions such as the selection of which analog channel is connected to the internal A/D converter, the digitised data format, the A/D clock source as well as controlling the start function and monitoring the A/D converter busy status. As the device contains only one actual analog to digital converter hardware circuit, each of the external or internal analog signal inputs must be routed to the converter. The SACS3~SACS0 bits in the SADC0 register are used to determine which external channel input is selected to be converted. The SAINS2~SAINS0 bits in the SADC1 register are used to determine that the analog signal to be converted comes from the internal analog signal or external analog channel input. If the SAINS2~SAINS0 bits are set to “000”, the external analog channel input is selected to be converted and the SACS3~SACS0 bits can determine which external channel is selected to be converted. If the SAINS2~SAINS0 bits are set to “001”, the internal Bandgap reference voltage is selected to be converted. The internal Bandgap reference voltage comes from the LVD/LVR circuitry. More detail information is described in the LVD/LVR section. When the SAINS2~SAINS0 bits are set to “010”, “011” or “100”, there will be no internal analog signal to be routed to the converter. Rev. 1.10 129 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU When the SAINS2~SAINS0 bits are set to “101”, “110” or “111”, the external analog channel is selected to be connected to the A/D Converter as well as the “000” selection of the SAINS bit field. Care must be taken when the internal analog signal is selected to be converted. If the internal analog signal is selected to be converted, the external analog channel input must never be selected as the A/D input by properly setting the SACS3~SACS0 bits. When the internal analog signal is selected, the SACS3~SACS0 bits should be configured with a value from 1000 to 1111. Otherwise, the external channel input will be connected together with the internal analog signal. This will result in unpredictable situations such as an irreversible damage. SAINS [2:0] 000, 101~111 SACS [3:0] Input Signals 0000~0111 AN0~AN7 Description External pin analog input 1000~1111 — Non-existed channel, input is floating. 001 1000~1111 VBG Internal Bandgap reference voltage 010, 011, 100 1000~1111 — Reserved, connected to ground. A/D Converter Input Signal Selection The relevant pin-shared function selection bits determine which pins on I/O Ports are used as analog inputs for the A/D converter input and which pins are not to be used as the A/D converter input. When the pin is selected to be an A/D input, its original function whether it is an I/O or other pinshared function will be removed. In addition, any internal pull-high resistor connected to the pin will be automatically removed if the pin is selected to be an A/D converter input. SADC0 Register Bit 7 6 5 4 3 2 1 0 Name START ADBZ ADCEN ADRFS SACS3 SACS2 SACS1 SACS0 R/W R/W R R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7START: Start the A/D Conversion 0 → 1 → 0: Start This bit is used to initiate an A/D conversion process. The bit is normally low but if set high and then cleared low again, the A/D converter will initiate a conversion process. Bit 6ADBZ: A/D Converter busy flag 0: No A/D conversion is in progress 1: A/D conversion is in progress This read only flag is used to indicate whether the A/D conversion is in progress or not. When the START bit is set from low to high and then to low again, the ADBZ flag will be set to 1 to indicate that the A/D conversion is initiated. The ADBZ flag will be cleared to 0 after the A/D conversion is complete. Bit 5ADCEN: A/D Converter function enable control 0: Disable 1: Enable This bit controls the A/D internal function. This bit should be set to one to enable the A/D converter. If the bit is set low, then the A/D converter will be switched off reducing the device power consumption. When the A/D converter function is disabled, the contents of the A/D data register pair known as ADRH and ADRL will be unchanged. Bit 4ADRFS: A/D conversion data format select 0: A/D converter data format → SADOH = D [11:4]; SADOL = D [3:0] 1: A/D converter data format → SADOH = D [11:8]; SADOL = D [7:0] This bit controls the format of the 12-bit converted A/D value in the two A/D data registers. Details are provided in the A/D converter data register section. Rev. 1.10 130 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 3~0SACS3~SACS0: A/D converter external analog channel input select 0000: External AN0 input 0001: External AN1 input 0010: External AN2 input 0011: External AN3 input 0100: External AN4 input 0101: External AN5 input 0110: External AN6 input 0111: External AN7 input 1xxx: Non-existed channel, the input will be floating if selected SADC1 Register Bit 7 6 5 4 3 2 1 0 Name SAINS2 SAINS1 SAINS0 SAVRS1 SAVRS0 SACKS2 SACKS1 SACKS0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~5SAINS2~SAINS0: A/D converter input signal select 000: External input – External analog channel input 001: Internal input – Internal Bandgap reference voltage, VBG 010: Internal input – Reserved, connected to ground. 011: Internal input – Reserved, connected to ground. 100: Internal input – Reserved, connected to ground. 101~111: External input – External analog channel input Care must be taken if the SAINS2~SAINS0 bits are set from “001” to “100” to select the internal analog signal to be converted. When the internal analog signal is selected to be converted, the external input pin must never be selected as the A/D input signal by properly setting the SACS3~SACS0 bits with a value from 1000 to 1111. Otherwise, the external channel input will be connected together with the internal analog signal. This will result in unpredictable situations such as an irreversible damage. Bit 4~3SAVRS1~SAVRS0: A/D converter reference voltage select 00: VREF pin 01: Internal A/D converter power, AVDD 1x: VREF pin These bits are used to select the A/D converter reference voltage. Care must be taken if the SAVRS1~SAVRS0 bits are set to “01” to select the internal A/D converter power as the reference voltage source. When the internal A/D converter power is selected as the reference voltage, the VREF pin can not be configured as the reference voltage input by properly configuring the corresponding pin-shared function control bits. Otherwise, the external input voltage on VREF pin will be connected to the internal A/D converter power. Bit 2~0SACKS2~SACKS0: A/D conversion clock source select 000: fSYS 001: fSYS/2 010: fSYS/4 011: fSYS/8 100: fSYS/16 101: fSYS/32 110: fSYS/64 111: fSYS/128 These bits are used to select the clock source for the A/D converter. Rev. 1.10 131 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU A/D Operation The START bit in the SADC0 register is used to start the AD conversion. When the microcontroller sets this bit from low to high and then low again, an analog to digital conversion cycle will be initiated. The ADBZ bit in the SADC0 register is used to indicate whether the analog to digital conversion process is in progress or not. This bit will be automatically set to 1 by the microcontroller after an A/D conversion is successfully initiated. When the A/D conversion is complete, the ADBZ will be cleared to 0. In addition, the corresponding A/D interrupt request flag will be set in the interrupt control register, and if the interrupts are enabled, an appropriate internal interrupt signal will be generated. This A/D internal interrupt signal will direct the program flow to the associated A/D internal interrupt address for processing. If the A/D internal interrupt is disabled, the microcontroller can poll the ADBZ bit in the SADC0 register to check whether it has been cleared as an alternative method of detecting the end of an A/D conversion cycle. The clock source for the A/D converter, which originates from the system clock fSYS, can be chosen to be either fSYS or a subdivided version of fSYS. The division ratio value is determined by the SACKS2~SACKS0 bits in the SADC1 register. Although the A/D clock source is determined by the system clock fSYS and by bits SACKS2~SACKS0, there are some limitations on the maximum A/D clock source speed that can be selected. As the recommended range of permissible A/D clock period, tADCK, is from 0.5μs to 10μ, care must be taken for system clock frequencies. For example, as the system clock operates at a frequency of 12MHz, the SACKS2~SACKS0 bits should not be set to 000~010 or 111. Doing so will give A/D clock periods that are less than the minimum A/D clock period which may result in inaccurate A/D conversion values. Refer to the following table for examples, where values marked with an asterisk * show where, depending upon the device, special care must be taken, as the values may be less than the specified minimum A/D Clock Period. A/D Clock Period (tADCK) fSYS SACKS[2:0] SACKS[2:0] SACKS[2:0] SACKS[2:0] SACKS[2:0] SACKS[2:0] SACKS[2:0] SACKS[2:0] = 000 = 001 = 010 = 011 = 100 = 101 = 110 = 111 (fSYS) (fSYS/2) (fSYS/4) (fSYS/8) (fSYS/16) (fSYS/32) (fSYS/64) (fSYS/128) 1 MHz 1μs 2μs 4μs 8μs 16μs * 32μs * 64μs * 2 MHz 500ns 1μs 2μs 4μs 8μs 16μs * 32μs * 128μs * 64μs * 4 MHz 250ns * 500ns 1μs 2μs 4μs 8μs 16μs * 32μs * 8 MHz 125ns * 250ns * 500ns 1μs 2μs 4μs 8μs 16μs * 12 MHz 83ns * 167ns * 333ns * 667ns 1.33μs 2.67μs 5.33μs 10.67μs * 16 MHz 62.5ns * 125ns * 250ns * 500ns 1μs 2μs 4μs 8μs 20 MHz 50ns * 100ns * 200ns * 400ns * 800ns 1.6μs 3.2μs 6.4μs A/D Clock Period Examples Controlling the power on/off function of the A/D converter circuitry is implemented using the ADCEN bit in the SADC0 register. This bit must be set high to power on the A/D converter. When the ADCEN bit is set high to power on the A/D converter internal circuitry a certain delay, as indicated in the timing diagram, must be allowed before an A/D conversion is initiated. Even if no pins are selected for use as A/D inputs, if the ADCEN bit is high, then some power will still be consumed. In power conscious applications it is therefore recommended that the ADCEN is set low to reduce power consumption when the A/D converter function is not being used. Rev. 1.10 132 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU A/D Reference Voltage The reference voltage supply to the A/D Converter can be supplied from the positive power supply pin, AVDD, or from an external reference source supplied on pin VREF. The desired selection is made using the SAVRS1 and SAVRS0 bits. When the SAVRS bit field is set to “01”, the A/D converter reference voltage will come from the AVDD pin. Otherwise, if the SAVRS bit field is set to any other value except “01”, the A/D converter reference voltage will come from the VREF pin. As the VREF pin is pin-shared with other functions, when the VREF pin is selected as the reference voltage supply pin, the VREF pin-shared function control bits should be properly configured to disable other pin functions. However, if the internal A/D converter power is selected as the reference voltage, the VREF pin must not be configured as the reference voltage input function to avoid the internal connection between the VREF pin to A/D converter power AVDD. A/D Converter Input Signals All the external A/D analog channel input pins are pin-shared with the I/O pins as well as other functions. The corresponding control bits for each A/D external input pin in the PxS0 and PxS1 register determine whether the input pins are setup as A/D converter analog inputs or whether they have other functions. If the pin is setup to be as an A/D analog channel input, the original pin functions will be disabled. In this way, pins can be changed under program control to change their function between A/D inputs and other functions. All pull high resistors, which are setup through register programming, will be automatically disconnected if the pins are setup as A/D inputs. Note that it is not necessary to first setup the A/D pin as an input in the port control register to enable the A/D input as when the pin-shared function control bits enable an A/D input, the status of the port control register will be overridden. There is an internal analog signal derived from the Bandgap reference voltage, which can be connected to the A/D converter as the analog input signal by configuring the SAINS2~SAINS0 bits. If the internal analog signal is selected to be converted, the external input channel determined by the SACS3~SACS0 bits must be switched to a non-existed A/D input channel by properly setting the SACS bit field with a value from 1000 to 1111. The A/D converter has its own reference voltage pin VREF however the reference voltage can also be supplied from the power supply pin, a choice which is made through the SAVRS1~SAVRS0 bits in the SADC1 register. The analog input values must not be allowed to exceed the value of the selected reference voltage, AVDD or VREF. Conversion Rate and Timing Diagram A complete A/D conversion contains two parts, data sampling and data conversion. The data sampling which is defined as tADS takes 4 A/D clock cycles and the data conversion takes 12 A/D clock cycles. Therefore a total of 16 A/D clock cycles for an external input A/D conversion which is defined as tADC are necessary. Maximum single A/D conversion rate = A/D clock period / 16 The accompanying diagram shows graphically the various stages involved in an analog to digital conversion process and its associated timing. After an A/D conversion process has been initiated by the application program, the microcontroller internal hardware will begin to carry out the conversion, during which time the program can continue with other functions. The time taken for the A/D conversion is 16 tADCK clock cycles where tADCK is equal to the A/D clock period. Rev. 1.10 133 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU tON�ST �DCEN off on off �/D samplin� time t�DS �/D samplin� time t�DS Start of �/D conversion Start of �/D conversion on ST�RT �DBZ S�CS[3:0] (S�INS[�:0]=000) End of �/D conversion 0011B �/D channel switch Start of �/D conversion End of �/D conversion 0010B 0000B t�DC �/D conversion time t�DC �/D conversion time 0001B t�DC �/D conversion time A/D Conversion Timing Summary of A/D Conversion Steps The following summarises the individual steps that should be executed in order to implement an A/D conversion process. • Step 1 Select the required A/D conversion clock by properly programming the SACKS2~SACKS0 bits in the SADC1 register. • Step 2 Enable the A/D converter by setting the ADCEN bit in the SADC0 register to one. • Step 3 Select which signal is to be connected to the internal A/D converter by correctly configuring the SAINS2~SAINS0 bits Select the external channel input to be converted, go to Step 4. Select the internal analog signal to be converted, go to Step 5. • Step 4 If the A/D input signal comes from the external channel input selecting by configuring the SAINS bit field, the corresponding pins should be configured as A/D input function by configuring the relevant pin-shared function control bits. The desired analog channel then should be selected by configuring the SACS bit field. After this step, go to Step 6. • Step 5 Before the A/D input signal is selected to come from the internal analog signal by configuring the SAINS bit field, the corresponding external input pin must be switched to a non-existed channel input by setting the SACS3~SACS0 bits with a value from 1000 to 1111. The desired internal analog signal then can be selected by configuring the SAINS bit field. After this step, go to Step 6. • Step 6 Select the reference voltage source by configuring the SAVRS1~SAVRS0 bits in the SADC1 register. • Step 7 Select A/D converter output data format by setting the ADRFS bit in the SADC0 register. • Step 8 If A/D conversion interrupt is used, the interrupt control registers must be correctly configured to ensure the A/D interrupt function is active. The master interrupt bontrol bit, EMI, and the A/D conversion interrupt control bit, ADE, must both be set high in advance. Rev. 1.10 134 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • Step 9 The A/D conversion procedure can now be initialized by setting the START bit from low to high and then low again. • Step 10 If A/D conversion is in progress, the ADBZ flag will be set high. After the A/D conversion process is complete, the ADBZ flag will go low and then the output data can be read from ADRH and ADRL registers. Note: When checking for the end of the conversion process, if the method of polling the ADBZ bit in the ADCR0 register is used, the interrupt enable step above can be omitted. Programming Considerations During microcontroller operations where the A/D converter is not being used, the A/D internal circuitry can be switched off to reduce power consumption, by setting bit ADCEN low in the SADC0 register. When this happens, the internal A/D converter circuits will not consume power irrespective of what analog voltage is applied to their input lines. If the A/D converter input lines are used as normal I/Os, then care must be taken as if the input voltage is not at a valid logic level, then this may lead to some increase in power consumption. A/D Transfer Function As the devices contain a 12-bit A/D converter, its full-scale converted digitised value is equal to FFFH. Since the full-scale analog input value is equal to the reference voltage, AVDD or VREF, this gives a single bit analog input value of reference voltage value divided by 4096. 1 LSB = (AVDD or VREF) ÷ 4096 The A/D Converter input voltage value can be calculated using the following equation: A/D input voltage = A/D output digital value ×(AVDD or VREF) ÷ 4096 The diagram shows the ideal transfer function between the analog input value and the digitised output value for the A/D converter. Except for the digitised zero value, the subsequent digitised values will change at a point 0.5 LSB below where they would change without the offset, and the last full scale digitised value will change at a point 1.5 LSB below the AVDD or VREF level. Ideal A/D Transfer Function Rev. 1.10 135 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU A/D Programming Examples The following two programming examples illustrate how to setup and implement an A/D conversion. In the first example, the method of polling the ADBZ bit in the SADC0 register is used to detect when the conversion cycle is complete, whereas in the second example, the A/D interrupt is used to determine when the conversion is complete. Example: using an ADBZ polling method to detect the end of conversion clr ADE; mov a,03H mov SADC1,a; set ADCEN mov a,03h ; mov PBS0,a mov a,20h mov SADC0,a ; : start_conversion: clr START ; set START ; clr START ; : polling_EOC: sz ADBZ ; jmp polling_EOC ; : mov a,SADOL ; mov ADRL_buffer,a ; mov a,SADOH ; mov ADRH_buffer,a ; : jmp start_conversion ; disable ADC interrupt select fSYS/8 as A/D clock setup PBS1 register to configure pin AN0 enable and connect AN0 channel to A/D converter high pulse on start bit to initiate conversion reset A/D start A/D poll the SADC0 register ADBZ bit to detect end of A/D conversion continue polling read save read save low byte conversion result value result to user defined register high byte conversion result value result to user defined register start next A/D conversion Example: using the interrupt method to detect the end of conversion clr ADE; mov a,03H mov SADC1,a; set ADCEN mov a,03h ; mov PBS0,a mov a,20h mov SADC0,a ; : Start_conversion: clr START ; set START ; clr START ; clr ADF ; set ADE; set EMI ; : : Rev. 1.10 disable ADC interrupt select fSYS/8 as A/D clock setup ACERL to configure pin AN0 enable and connect AN0 channel to A/D converter high pulse on START bit to initiate conversion reset A/D start A/D clear ADC interrupt request flag enable ADC interrupt enable global interrupt 136 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU ADC_ISR: mov acc_stack,a mov a,STATUS mov status_stack,a : mov a, SADOL mov adrl_buffer,a mov a, SADOH mov adrh_buffer,a : EXIT_INT_ISR: mov a,status_stack mov STATUS,a mov a,acc_stack reti ; ADC interrupt service routine ; save ACC to user defined memory ; save STATUS to user defined memory ; ; ; ; read save read save low byte conversion result value result to user defined register high byte conversion result value result to user defined register ; restore STATUS from user defined memory ; restore ACC from user defined memory Comparators Two independent analog comparators are contained within these devices. These functions offer flexibility via their register controlled features such as power-down, polarity select, hysteresis etc. In sharing their pins with normal I/O pins the comparators do not waste precious I/O pins if there functions are otherwise unused. CnRSP Cn+ S0 Cn− CNVTn[1:0] CnOFM, CnOF[4:0] CMP n Interrupt CMPnO S2 S1 Pin-shared select One Shot + − CnX Pin CnPOL CMPnEN Pin-shared select Comparator Operation The devices contain two comparator functions which are used to compare two analog voltages and provide an output based on their input difference. Any pull-high resistors connected to the shared comparator input pins will be automatically disconnected when the corresponding comparator functional pins are selected. As the comparator inputs approach their switching level, some spurious output signals may be generated on the comparator output due to the slow rising or falling nature of the input signals. This can be minimised by the hysteresis function. Ideally the comparator should switch at the point where the positive and negative inputs signals are at the same voltage level. However, unavoidable input offsets introduce some uncertainties here. The hysteresis function will also increases the switching offset value. The hysteresis window will be changed for different comparator response time selections. The comparator response time is shown in the comparator electrical characteristics. Rev. 1.10 137 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Comparator Registers Full control over each internal comparator is provided via two control registers, CMPnC and CMPnVOS. The comparator output is recorded via a bit in the respective control register, but can also be transferred out onto a shared I/O pin. Additional comparator functions include output polarity, response time and power down control. Bit Register Name 7 6 5 4 3 2 1 0 CMPnC — CMPnEN CnPOL CMPnO CNVTn1 CNVTn0 — — CMPnVOS — CnOFM CnRSP CnOF4 CnOF3 CnOF2 CnOF1 CnOF0 Comparator Registers List – n = 0 or 1 CMPnC Register Bit 7 6 5 4 3 2 1 0 Name — CMPnEN CnPOL CMPnO CNVTn1 CNVTn0 — — R/W — R/W R/W R R/W R/W — — POR — 0 0 0 0 0 — — Bit 7 Unimplemented, read as “0” Bit 6CMPnEN: Comparator n Enable Control 0: Disable 1: Enable This is the Comparator n on/off control bit. If the bit is zero the comparator n will be switched off and no power consumed even if analog voltages are applied to its inputs. For power sensitive applications this bit should be cleared to zero if the comparator n is not used or before the devices enter the SLEEP or IDLE mode. Note that the comparator output will be set low when this bit is cleared to zero. Bit 5CnPOL: Comparator n output polarity Control 0: Output is not inverted 1: Output is inverted This is the Comparator n polarity control bit. If the bit is zero then the comparator n output bit, CMPnO, will reflect the non-inverted output condition of the comparator n. If the bit is high the comparator n output bit will be inverted. Bit 4CMPnO: Comparator n output bit If CnPOL=0, 0: Cn+ < Cn– 1: Cn+ > Cn– If CnPOL=1, 0: Cn+ > Cn– 1: Cn+ < Cn– This bit stores the Comparator n output bit. The polarity of the bit is determined by the voltages on the comparator n inputs and by the condition of the CnPOL bit. Bit 3~2CNVTn1~CNVTn0: Comparator n response time select 00: Response time = tRP0 (max.) 01: Response time = tRP1 10: Response time = tRP2 11: Response time = tRP3 (min.) These bits are used to select the Comparator n response time. The response time is also determined by the overdriven voltage applied on the inputs except these bits. Refer to the comparator electrical characteristics for details. Bit 1~0 Rev. 1.10 Unimplemented, read as “0” 138 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU CMPnVOS Register Bit 7 6 5 4 3 2 1 0 Name — CnOFM CnRSP CnOF4 CnOF3 CnOF2 CnOF1 CnOF0 R/W — R/W R/W R/W R/W R/W R/W R/W POR — 0 0 1 0 0 0 0 Bit 7 Unimplemented, read as “0” Bit 6CnOFM: Comparator n input offset calibration mode select 0: Normal operation mode 1: Offset calibration mode This is the Comparator n offset calibration mode selection bit. If the bit is zero the comparator n will operate normally. The comparator n will enter the offset calibration mode if this bit is set to high. Bit 5CnRSP: Comparator n input offset calibration reference select 0: From Cn– input 1: From Cn+ input This is the Comparator n offset calibration reference selection bit. When the comparator n is in the offset calibration mode, the calibration reference input can come from the comparator n inputs, Cn– or Cn+, determined by this bit. This bit is only available when the comparator n operates in offset calibration mode. Bit 4~0CnOF4~CnOF0: Comparator n input offset calibration control 0: From Cn– input 1: From Cn+ input These bits are used to calibrate the input offset according to the selected reference input when the Comparator n is in the offset calibration mode. Refer to the corresponding “Offset Calibration Procedure” section for the detailed calibration procedure. Offset Calibration Procedure To operate in the input offset calibration mode for the Comparator n, the CnOFM bit should first be set to “1” followed by the reference input selection by configuring the CnRSP bit. For comparator n input offset calibration, the procedures are summarizedas as the following. Step 1. Set CnOFM = 1 and configure the CnRSP bit, the comparator n will now operate in the comparator input offset calibration mode. Step 2. Set CnOF [4:0] = 00000 and read the CMPnO bit. Step 3. Increase the CnOF [4:0] value by 1 and then read the CMPnO bit. If the CMPnO bit state has not changed, then repeat Step 3 until the CMPnO bit state has changed. If the CMPnO bit state has changed, record the CnOF field value as CnVOS1 and then go to Step 4. Step 4. Set CnOF [4:0] = 11111 and read the CMPnO bit. Step 5. Decrease the CnOF [4:0] value by 1 and then read the CMPnO bit. If the CMPnO bit state has not changed, then repeat Step 5 until the CMPnO bit state has changed. If the CMPnO bit state has changed, record the CnOF field value as CnVOS2 and then go to Step 6. Step 6. Restore the comparator input offset calibration value, CnVOS, into the CnOF [4:0] bit field. The offset calibration procedure is now finished and the input offset value is calculated by the following equation. CnVOS1 + CnVOS2 CnVOS = 2 Rev. 1.10 139 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Serial Peripheral Interface – SPI The device contains two SPI function, SPI0 and SPI1. The SPIn interface is often used to communicate with external peripheral devices such as sensors, Flash or EEPROM memory devices, etc. Originally developed by Motorola, the four line SPI interface is a synchronous serial data interface that has a relatively simple communication protocol simplifying the programming requirements when communicating with external hardware devices. The communication is full duplex and operates as a slave/master type, where the devices can be either master or slave. Although the SPIn interface specification can control multiple slave devices from a single master, the device is provided only one SCSn pin. If the master needs to control multiple slave devices from a single master, the master can use I/O pin to select the slave devices. SPI Interface Operation The SPIn interface is a full duplex synchronous serial data link. It is a four line interface with pin names SDIn, SDOn, SCKn and SCSn. Pins SDIn and SDOn are the Serial Data Input and Serial Data Output lines. The SCKn pin is the Serial Clock line and SCSn is the Slave Select line. As the SPIn interface pins are pin-shared with other functions, the SPIn interface pins must first be selected by configuring the corresponding selection bits in the pin-shared function selection registers. The SPIn interface function is disabled or enabled using the SPInEN bit in the SPInC0 register. Communication between devices connected to the SPIn interface is carried out in a slave/master mode with all data transfer initiations being implemented by the master. The master also controls the clock/signal. As the device only contains a single SCSn pin only one slave device can be utilised. The SCSn pin is controlled by the application program, set the the CSENn bit to “1” to enable the SCSn pin function and clear the CSENn bit to “0” to place the SCSn pin into an floating state. SPIn Master SPIm Slave SCKn SCKm SDOn SDOm SDIn SDIm SCSn SCSm SPIn Master/Slave Connection The SPIn Serial Interface function includes the following features: • Full-duplex synchronous data transfer • Both Master and Slave mode • LSB first or MSB first data transmission modes • Transmission complete flag • Rising or falling active clock edge The status of the SPIn interface pins is determined by a number of factors such as whether the device is in the master or slave mode and upon the condition of certain control bits such as CSENn and SPInEN. Rev. 1.10 140 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Data Bus SPInD SDIn Pin TX/RX Shift Register SDOn Pin Clock Edge/Polarity Control CKEGn CKPOLBn WCOLn TRFn ICFn Busy Status SCKn Pin Clock Source Select fSYS fSUB CTM0 CCRP match frequency/2 SCSn Pin CSENn SPIn Block Diagram SPI Registers There are three internal registers which control the overall operation of the SPIn interface. These are the SPInD data register and two control registers, SPInC0 and SPInC1. Bit Register Name 7 6 5 4 3 2 1 0 SPInC0 SPInM2 SPInM1 SPInM0 — — — SPInEN ICFn SPInC1 — — CKPOLBn CKEGn MLSn CSENn WCOLn TRFn SPInD D7 D6 D5 D4 D3 D2 D1 D0 SPIn Registers List – n = 0 or 1 SPIn Data Register The SPInD register is used to store the data being transmitted and received. Before the device writes data to the SPIn bus, the actual data to be transmitted must be placed in the SPInD register. After the data is received from the SPIn bus, the device can read it from the SPInD register. Any transmission or reception of data from the SPIn bus must be made via the SPInD register. • SPInD Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR x x x x x x x x “x”: unknown Rev. 1.10 141 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU SPIn Control Register There are also two control registers for the SPIn interface, SPInC0 and SPInC1. Register SPInC0 is used to control the enable/disable function and to set the data transmission clock frequency. Register SPInC1 is used for other control functions such as LSB/MSB selection, write collision flag, etc. • SPInC0 Register Bit 7 6 5 4 3 2 1 0 Name SPInM2 SPInM1 SPInM0 — — — SPInEN ICFn R/W R/W R/W R/W — — — R/W R/W POR 1 1 1 — — — 0 0 Bit 7~5SPInM2~SPInM0: SPIn Master/Slave clock select 000: SPIn master mode with clock fSYS /4 001: SPIn master mode with clock fSYS /16 010: SPIn master mode with clock fSYS /64 011: SPIn master mode with clock fSUB 100: SPIn master mode with clock CTM CCRP match frequency/2 101: SPIn slave mode 11x: SPIn disabled Bit 4~2 Unimplemented, read as “0” Bit 1SPInEN: SPIn Enable Control 0: Disable 1: Enable The bit is the overall on/off control for the SPIn interface. When the SPInEN bit is cleared to zero to disable the SPIn interface, the SDIn, SDOn, SCKn and SCSn lines will lose the SPI function and the SPIn operating current will be reduced to a minimum value. When the bit is high the SPIn interface is enabled. Bit 0ICFn: SPIn Incomplete Flag 0: SPIn incomplete condition not occurred 1: SPIn incomplete condition occured This bit is only available when the SPIn is configured to operate in an SPIn slave mode. If the SPIn operates in the slave mode with the SPInEN and CSENn bits both being set to 1 but the SCSn line is pulled high by the external master device before the SPIn data transfer is completely finished, the ICFn bit will be set to 1 together with the TRFn bit. When this condition occurs, the corresponding interrupt will occur if the interrupt function is enabled. However, the TRFn bit will not be set to 1 if the ICFn bit is set to 1 by software application program. Rev. 1.10 142 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • SPInC1 Register Bit 7 6 5 4 3 2 1 0 Name — — CKPOLBn CKEGn MLSn CSENn WCOLn TRFn R/W — — R/W R/W R/W R/W R/W R/W POR — — 0 0 0 0 0 0 Bit 7~6 Unimplemented, read as “0” Bit 5CKPOLBn: SPIn clock line base condition selection 0: The SCKn line will be high when the clock is inactive 1: The SCKn line will be low when the clock is inactive The CKPOLBn bit determines the base condition of the clock line, if the bit is high, then the SCKn line will be low when the clock is inactive. When the CKPOLBn bit is low, then the SCKn line will be high when the clock is inactive. Bit 4CKEGn: SPIn SCKn clock active edge type selection CKPOLBn=0 0: SCKn is high base level and data capture at SCKn rising edge 1: SCKn is high base level and data capture at SCKn falling edge CKPOLBn=1 0: SCKn is low base level and data capture at SCKn falling edge 1: SCKn is low base level and data capture at SCKn rising edge The CKEGn and CKPOLBn bits are used to setup the way that the clock signal outputs and inputs data on the SPIn bus. These two bits must be configured before data transfer is executed otherwise an erroneous clock edge may be generated. The CKPOLBn bit determines the base condition of the clock line, if the bit is high, then the SCKn line will be low when the clock is inactive. When the CKPOLBn bit is low, then the SCKn line will be high when the clock is inactive. The CKEGn bit determines active clock edge type which depends upon the condition of CKPOLBn bit. Bit 3MLSn: SPIn bus data shift order 0: LSB first 1: MSB first This is the data shift select bit and is used to select how the data is transferred, either MSB or LSB first. Setting the bit high will select MSB first and low for LSB first. Bit 2CSENn: SPIn SCSn pin control 0: Disable 1: Enable The CSENn bit is used as an enable/disable for the SCSn pin. If this bit is low, then the SCSn pin function will be disabled and can be placed into I/O pin or other pin-shared functions. If the bit is high, the SCSn pin will be enabled and used as a select pin. Bit 1WCOLn: SPIn write collision flag 0: No collision 1: Collision The WCOLn flag is used to detect whether a data collision has occurred or not. If this bit is high, it means that data has been attempted to be written to the SPInD register duting a data transfer operation. This writing operation will be ignored if data is being transferred. This bit can be cleared by the application program. Bit 0TRFn: SPIn Transmit/Receive complete flag 0: SPIn data is being transferred 1: SPIn data transfer is completed The TRFn bit is the Transmit/Receive Complete flag and is set to 1 automatically when an SPIn data transfer is completed, but must cleared to 0 by the application program. It can be used to generate an interrupt. Rev. 1.10 143 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU SPI Communication After the SPIn interface is enabled by setting the SPInEN bit high, then in the Master Mode, when data is written to the SPInD register, transmission/reception will begin simultaneously. When the data transfer is complete, the TRFn flag will be set automatically, but must be cleared using the application program. In the Slave Mode, when the clock signal from the master has been received, any data in the SPInD register will be transmitted and any data on the SDIn pin will be shifted into the SPInD registers. The master should output a SCSn signal to enable the slave device before a clock signal is provided. The slave data to be transferred should be well prepared at the appropriate moment relative to the SCSn signal depending upon the configurations of the CKPOLBn bit and CKEGn bit. The accompanying timing diagram shows the relationship between the slave data and SCSn signal for various configurations of the CKPOLBn and CKEGn bits. The SPIn will continue to function if the SPIn clock source is active. Rev. 1.10 144 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Note: For SPIn Slave mode, if SPInEN=1 and CSENn=0, SPIn is always enabled and ignore the SCSn level. SPIn Master/Slave Mode Timing Diagram SPIn Transfer Control Flowchart Rev. 1.10 145 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU SPI Bus Enable/Disable To enable the SPIn bus, set CSENn=1 and SCSn =0, then wait for data to be written into the SPInD (TXRX buffer) register. For the Master Mode, after data has been written to the SPInD (TXRX buffer) register, then transmission or reception will start automatically. When all the data has been transferred the TRFn bit should be set. For the Slave Mode, when clock pulses are received on SCKn, data in the TXRX buffer will be shifted out or data on SDIn will be shifted in. To Disable the SPIn bus SCKn, SDIn, SDOn, SCSn will become I/O pins or other pin-shared functions. SPI Operation All communication is carried out using the 4-line interface for either Master or Slave Mode. The CSENn bit in the SPInC1 register controls the overall function of the SPIn interface. Setting this bit high will enable the SPIn interface by allowing the SCSn line to be active, which can then be used to control the SPIn interface. If the CSENn bit is low, the SPIn interface will be disabled and the SCSn line will be an I/O pin or other pin-shared functions and can therefore not be used for control of the SPIn interface. If the CSENn bit and the SPInEN bit in the SPInC0 register are set high, this will place the SDIn line in a floating condition and the SDOn line high. If in Master Mode the SCKn line will be either high or low depending upon the clock polarity selection bit CKPOLBn in the SPInC1 register. If in Slave Mode the SCKn line will be in a floating condition. If SPInEN is low then the bus will be disabled and SCSn, SDIn, SDOn and SCKn pins will all become I/O pins or other pin-shared functions. In the Master Mode the Master will always generate the clock signal. The clock and data transmission will be initiated after data has been written into the SPInD register. In the Slave Mode, the clock signal will be received from an external master device for both data transmission and reception. The following sequences show the order to be followed for data transfer in both Master and Slave Mode. Master Mode • Step 1 Select the clock source and Master mode using the SPInM2~SPInM0 bits in the SPInC0 control register • Step 2 Setup the CSENn bit and setup the MLSn bit to choose if the data is MSB or LSB shifted first, this must be same as the Slave device. • Step 3 Setup the SPInEN bit in the SPInC0 control register to enable the SPIn interface. • Step 4 For write operations: write the data to the SPInD register, which will actually place the data into the TXRX buffer. Then use the SCKn and SCSn lines to output the data. After this go to step 5. For read operations: the data transferred in on the SDIn line will be stored in the TXRX buffer until all the data has been received at which point it will be latched into the SPInD register. • Step 5 Check the WCOLn bit if set high then a collision error has occurred so return to step 4. If equal to zero then go to the following step. • Step 6 Check the TRFn bit or wait for a SPIn serial bus interrupt. • Step 7 Read data from the SPInD register. Rev. 1.10 146 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • Step 8 Clear TRFn. • Step 9 Go to step 4. Slave Mode • Step 1 Select the SPIn Slave mode using the SPInM2~SPInM0 bits in the SPInC0 control register • Step 2 Setup the CSENn bit and setup the MLSn bit to choose if the data is MSB or LSB shifted first, this setting must be the same with the Master device. • Step 3 Setup the SPInEN bit in the SPInC0 control register to enable the SPIn interface. • Step 4 For write operations: write the data to the SPInD register, which will actually place the data into the TXRX buffer. Then wait for the master clock SCKn and SCSn signal. After this, go to step 5. For read operations: the data transferred in on the SDIn line will be stored in the TXRX buffer until all the data has been received at which point it will be latched into the SPInD register. • Step 5 Check the WCOLn bit if set high then a collision error has occurred so return to step 4. If equal to zero then go to the following step. • Step 6 Check the TRFn bit or wait for a SPIn serial bus interrupt. • Step 7 Read data from the SPInD register. • Step 8 Clear TRFn. • Step 9 Go to step 4. Error Detection The WCOLn bit in the SPInC1 register is provided to indicate errors during data transfer. The bit is set by the SPIn serial Interface but must be cleared by the application program. This bit indicates a data collision has occurred which happens if a write to the SPInD register takes place during a data transfer operation and will prevent the write operation from continuing. Rev. 1.10 147 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Inter-Integrated Circuit – I2C The I 2C interface is used to communicate with external peripheral devices such as sensors, EEPROM memory etc. Originally developed by Philips, it is a two line low speed serial interface for synchronous serial data transfer. The advantage of only two lines for communication, relatively simple communication protocol and the ability to accommodate multiple devices on the same bus has made it an extremely popular interface type for many applications. I2C Master Slave Bus Connection I2C interface Operation The I2C serial interface is a two line interface, a serial data line, SDA, and serial clock line, SCL. As many devices may be connected together on the same bus, their outputs are both open drain types. For this reason it is necessary that external pull-high resistors are connected to these outputs. Note that no chip select line exists, as each device on the I2C bus is identified by a unique address which will be transmitted and received on the I2C bus. When two devices communicate with each other on the bidirectional I2C bus, one is known as the master device and one as the slave device. Both master and slave can transmit and receive data, however, it is the master device that has overall control of the bus. For these devices, which only operate in slave mode, there are two methods of transferring data on the I2C bus, the slave transmit mode and the slave receive mode. Data Bus I2C Data Register (IICD) Address Comparator Direction Control HXT fSYS SCL Pin SDA Pin I2C Address Register (IICD) Debounce Circuitry IICDEB[1:0] Data in MSB M U X Shift Register I2C Interrupt SRW Data out MSB TXAK Transmit/ Receive Control Unit fSUB IICTOEN Read/Write Slave Address Match–HAAS 8-bit Data Transfer Conplete–HCF Detect Start or Stop Time-out Control HBB IICTOF Address Match I2C Block Diagram Rev. 1.10 148 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU S T A R T s ig n a l fro m M a s te r S e n d s la v e a d d r e s s a n d R /W b it fr o m M a s te r A c k n o w le d g e fr o m s la v e S e n d d a ta b y te fro m M a s te r A c k n o w le d g e fr o m s la v e S T O P s ig n a l fro m M a s te r The IICDEB1 and IICDEB0 bits determine the debounce time of the I2C interface. This uses the system clock to in effect add a debounce time to the external clock to reduce the possibility of glitches on the clock line causing erroneous operation. The debounce time, if selected, can be chosen to be either 2 or 4 system clocks. To achieve the required I2C data transfer speed, there exists a relationship between the system clock, fSYS, and the I2C debounce time. For either the I2C Standard or Fast mode operation, users must take care of the selected system clock frequency and the configured debounce time to match the criterion shown in the following table. I2C Debounce Time Selection I2C Standard Mode (100kHz) I2C Fast Mode (400kHz) No Debounce fSYS > 2 MHz fSYS > 5 MHz 2 system clock debounce fSYS > 4 MHz fSYS > 10 MHz 4 system clock debounce fSYS > 8 MHz fSYS > 20 MHz I C Minimum fSYS Frequency 2 I2C Register There are three control registers associated with the I2C bus, IICC0, IICC1, IICTOC, and one slave address register, IICA, together with one data register, IICD. The IICD register is used to store the data being transmitted and received on the I2C bus. Before the microcontroller writes data to the I2C bus, the actual data to be transmitted must be placed in the IICD register. After the data is received from the I2C bus, the microcontroller can read it from the IICD register. Any transmission or reception of data from the I2C bus must be made via the IICD register. Bit Register Name 7 6 5 4 3 2 1 0 IICC0 — — — — IICDEB1 IICDEB0 IICEN — IICC1 HCF HAAS HBB HTX TXAK SRW IAMWU RXAK IICA IICA6 IICA5 IICA4 IICA3 IICA2 IICA1 IICA0 D0 IICD D7 D6 D5 D4 D3 D2 D1 D0 IICTOC IICTOEN IICTOF IICTOS5 IICTOS4 IICTOS3 IICTOS2 IICTOS1 IICTOS0 I2C Registers List Rev. 1.10 149 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU IICD Register The IICD register is used to store the data being transmitted and received. Before the device writes data to the I2C bus, the actual data to be transmitted must be placed in the IICD register. After the data is received from the I2C bus, the device can read it from the IICD register. Any transmission or reception of data from the I2C bus must be made via the IICD register. Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D4 D3 D2 D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR x x x x x x x x “x”: unknown IICA Register The IICA register is the location where the 7-bit slave address of the slave device is stored. Bits 7~1 of the IICA register define the device slave address. Bit 0 is not defined. When a master device, which is connected to the I2C bus, sends out an address, which matches the slave address in the IICA register, the slave device will be selected. Bit 7 6 5 4 3 2 1 0 Name IICA6 IICA5 IICA4 IICA3 IICA2 IICA1 IICA0 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~1IICA6~IICA0: I2C slave address IICA6~IICA0 is the I2C slave address bit 6 ~ bit 0 Bit 0 Undefined bit The bit can be read or written by the application program. I2C Control Registers There are two control registers for the I2C interface, IICC0 and IICC1. The register IICC0 is used to control the enable/disable function and to set the data transmission clock frequency.The IICC1 register contains the relevant flags which are used to indicate the I2C communication status. Another register, IICTOC, is used to control the I2C time-out function and described in the corresponding section. • IICC0 Register Bit 7 6 5 4 3 2 1 0 Name — — — — IICDEB1 IICDEB0 IICEN — R/W — — — — R/W R/W R/W — POR — — — — 0 0 0 — Bit 7~4 Unimplemented, read as “0” Bit 3~2IICDEB1~IICDEB0: I2C Debounce Time Selection 00: No debounce 01: 2 system clock debounce 1x: 4 system clock debounce Note that the I2C debounce circuit will operate normally if the system clock, fSYS, is derived from the fH clock or the IAMWU bit is equal to 0. Otherwise, the debounce circuit will have no effect and be bypassed. Rev. 1.10 150 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 1IICEN: I2C Enable Control 0: Disable 1: Enable The bit is the overall on/off control for the I2C interface. When the IICEN bit is cleared to zero to disable the I2C interface, the SDA and SCL lines will lose their I2C function and the I2C operating current will be reduced to a minimum value. When the bit is high the I2C interface is enabled. If the IICEN bit changes from low to high, the contents of the I2C control bits such as HTX and TXAK will remain at the previous settings and should therefore be first initialised by the application program while the relevant I2C flags such as HCF, HAAS, HBB, SRW and RXAK will be set to their default states. Bit 0 Unimplemented, read as “0” • IICC1 Register Bit 7 6 5 4 3 2 1 0 Name HCF HAAS HBB HTX TXAK SRW IAMWU RXAK R/W R R R R/W R/W R/W R/W R POR 1 0 0 0 0 0 0 1 Bit 7HCF: I C Bus data transfer completion flag 0: Data is being transferred 1: Completion of an 8-bit data transfer The HCF flag is the data transfer flag. This flag will be zero when data is being transferred. Upon completion of an 8-bit data transfer the flag will go high and an interrupt will be generated. 2 Bit 6HAAS: I2C Bus data transfer completion flag 0: Not address match 1: Address match The HAAS flag is the address match flag. This flag is used to determine if the slave device address is the same as the master transmit address. If the addresses match then this bit will be high, if there is no match then the flag will be low. Bit 5HBB: I2C Bus busy flag 0: I2C Bus is not busy 1: I2C Bus is busy The HBB flag is the I2C busy flag. This flag will be “1” when the I2C bus is busy which will occur when a START signal is detected. The flag will be set to “0” when the bus is free which will occur when a STOP signal is detected. Bit 4HTX: I2C slave device transmitter/receiver selection 0: Slave device is the receiver 1: Slave device is the transmitter Bit 3TXAK: I2C bus transmit acknowledge flag 0: Slave send acknowledge flag 1: Slave does not send acknowledge flag The TXAK bit is the transmit acknowledge flag. After the slave device receipt of 8-bits of data, this bit will be transmitted to the bus on the 9th clock from the slave device. The slave device must always set TXAK bit to “0” before further data is received. Rev. 1.10 151 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 2SRW: I2C slave read/write flag 0: Slave device should be in receive mode 1: Slave device should be in transmit mode The SRW flag is the I 2C Slave Read/Write flag. This flag determines whether the master device wishes to transmit or receive data from the I2C bus. When the transmitted address and slave address is match, that is when the HAAS flag is set high, the slave device will check the SRW flag to determine whether it should be in transmit mode or receive mode. If the SRW flag is high, the master is requesting to read data from the bus, so the slave device should be in transmit mode. When the SRW flag is zero, the master will write data to the bus, therefore the slave device should be in receive mode to read this data. Bit 1IAMWU: I2C Address Match Wake-Up control 0: Disable 1: Enable – must be cleared by the application program after wake-up This bit should be set to 1 to enable the I2C address match wake up from the SLEEP or IDLE Mode. If the IAMWU bit has been set before entering either the SLEEP or IDLE mode to enable the I2C address match wake up, then this bit must be cleared by the application program after wake-up to ensure correction device operation. Bit 0RXAK: I2C bus receive acknowledge flag 0: Slave receives acknowledge flag 1: Slave does not receive acknowledge flag The RXAK flag is the receiver acknowledge flag. When the RXAK flag is “0”, it means that a acknowledge signal has been received at the 9th clock, after 8 bits of data have been transmitted. When the slave device in the transmit mode, the slave device checks the RXAK flag to determine if the master receiver wishes to receive the next byte. The slave transmitter will therefore continue sending out data until the RXAK flag is “1”. When this occurs, the slave transmitter will release the SDA line to allow the master to send a STOP signal to release the I2C Bus. I2C Bus Communication Communication on the I2C bus requires four separate steps, a START signal, a slave device address transmission, a data transmission and finally a STOP signal. When a START signal is placed on the I2C bus, all devices on the bus will receive this signal and be notified of the imminent arrival of data on the bus. The first seven bits of the data will be the slave address with the first bit being the MSB. If the address of the slave device matches that of the transmitted address, the HAAS bit in the IICC1 register will be set and an I2C interrupt will be generated. After entering the interrupt service routine, the slave device must first check the condition of the HAAS and IICTOF bits to determine whether the interrupt source originates from an address match, 8-bit data transfer completion or I2C bus timeout occurrence. During a data transfer, note that after the 7-bit slave address has been transmitted, the following bit, which is the 8th bit, is the read/write bit whose value will be placed in the SRW bit. This bit will be checked by the slave device to determine whether to go into transmit or receive mode. Before any transfer of data to or from the I2C bus, the microcontroller must initialise the bus, the following are steps to achieve this: • Step 1 Configure the corresponding pin-shared function as the I2C functional pins and set the IICEN bit to “1” to enable the I2C bus. • Step 2 Write the slave address of the device to the I2C bus address register IICA. • Step 3 Set the IICE and corresponding Multi-Function interrupt enable bit of the interrupt control register to enable the IIC interrupt and Multi-function interrupt. Rev. 1.10 152 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU I2C Bus Start Signal The START signal can only be generated by the master device connected to the I2C bus and not by the slave device. This START signal will be detected by all devices connected to the I2C bus. When detected, this indicates that the I2C bus is busy and therefore the HBB bit will be set. A START condition occurs when a high to low transition on the SDA line takes place when the SCL line remains high. I2C Slave Address The transmission of a START signal by the master will be detected by all devices on the I2C bus. To determine which slave device the master wishes to communicate with, the address of the slave device will be sent out immediately following the START signal. All slave devices, after receiving this 7-bit address data, will compare it with their own 7-bit slave address. If the address sent out by the master matches the internal address of the microcontroller slave device, then an internal I2C bus interrupt signal will be generated. The next bit following the address, which is the 8th bit, defines the read/write status and will be saved to the SRW bit of the IICC1 register. The slave device will then transmit an acknowledge bit, which is a low level, as the 9th bit. The slave device will also set the status flag HAAS when the addresses match. As an I2C bus interrupt can come from three sources, when the program enters the interrupt subroutine, the HAAS and IICTOF bits should be examined to see whether the interrupt source has come from a matching slave address, the completion of a data byte transfer or the I2C bus time-out occurrence. When a slave address is matched, the devices must be placed in either the transmit mode and then write data to the IICD register, or in the receive mode where it must implement a dummy read from the IICD register to release the SCL line. I2C Bus Reae/Write Signal The SRW bit in the IICC1 register defines whether the slave device wishes to read data from the I2C bus or write data to the I2C bus. The slave device should examine this bit to determine if it is to be a transmitter or a receiver. If the SRW flag is “1” then this indicates that the master device wishes to read data from the I2C bus, therefore the slave device must be setup to send data to the I2C bus as a transmitter. If the SRW flag is “0” then this indicates that the master wishes to send data to the I2C bus, therefore the slave device must be setup to read data from the I2C bus as a receiver. I2C Bus Slave Address Acknowledge Signal After the master has transmitted a calling address, any slave device on the I 2C bus, whose own internal address matches the calling address, must generate an acknowledge signal. The acknowledge signal will inform the master that a slave device has accepted its calling address. If no acknowledge signal is received by the master then a STOP signal must be transmitted by the master to end the communication. When the HAAS flag is high, the addresses have matched and the slave device must check the SRW flag to determine if it is to be a transmitter or a receiver. If the SRW flag is high, the slave device should be setup to be a transmitter so the HTX bit in the IICC1 register should be set to “1”. If the SRW flag is low, then the microcontroller slave device should be setup as a receiver and the HTX bit in the IICC1 register should be set to “0”. Rev. 1.10 153 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU I2C Bus Data and Acknowledge Signal The transmitted data is 8-bits wide and is transmitted after the slave device has acknowledged receipt of its slave address. The order of serial bit transmission is the MSB first and the LSB last. After receipt of 8-bits of data, the receiver must transmit an acknowledge signal, level “0”, before it can receive the next data byte. If the slave transmitter does not receive an acknowledge bit signal from the master receiver, then the slave transmitter will release the SDA line to allow the master to send a STOP signal to release the I2C Bus. The corresponding data will be stored in the IICD register. If setup as a transmitter, the slave device must first write the data to be transmitted into the IICD register. If setup as a receiver, the slave device must read the transmitted data from the IICD register. When the slave receiver receives the data byte, it must generate an acknowledge bit, known as TXAK, on the 9th clock. The slave device, which is setup as a transmitter will check the RXAK bit in the IICC1 register to determine if it is to send another data byte, if not then it will release the SDA line and await the receipt of a STOP signal from the master. Note: *When a slave address is matched, the devices must be placed in either the transmit mode and then write data to the SIMD register, or in the receive mode where it must implement a dummy read from the SIMD register to release the SCL line. I2C Communication Timing Diagram Rev. 1.10 154 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU I2C Time-out Control In order to reduce the I2C lockup problem due to reception of erroneous clock sources, a time-out function is provided. If the clock source connected to the I2C bus is not received for a while, then the I2C circuitry and registers will be reset after a certain time-out period. The time-out counter starts to count on an I2C bus “START” & “address match”condition, and is cleared by an SCL falling edge. Before the next SCL falling edge arrives, if the time elapsed is greater than the time-out period specified by the IICTOC register, then a time-out condition will occur. The time-out function will stop when an I2C “STOP” condition occurs. Rev. 1.10 155 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU S ta rt S C L S R W S la v e A d d r e s s 0 1 S D A 1 1 0 1 0 A C K 1 0 I2 C t i m e - o u t c o u n te r s ta rt S to p S C L 1 0 0 1 0 1 0 0 S D A I2 C t im e - o u t c o u n t e r r e s e t o n S C L n e g a tiv e tr a n s itio n I2C Time-out When an I2C time-out counter overflow occurs, the counter will stop and the IICTOEN bit will be cleared to zero and the IICTOF bit will be set high to indicate that a time-out condition has occurred. The time-out condition will also generate an interrupt which uses the I2C interrrupt vector. When an I2C time-out occurs, the I2C internal circuitry will be reset and the registers will be reset into the following condition: Register After I2C Time-out IICD, IICA, IICC0 No change IICC1 Reset to POR condition I C Register after Time-out 2 The IICTOF flag can be cleared by the application program. There are 64 time-out period selections which can be selected using the IICTOS bits in the IICTOC register. The time-out duration is calculated by the formula: ((1~64) × (32/fSUB)). This gives a time-out period which ranges from about 1ms to 64ms. IICTOC Register Bit 7 6 5 4 3 2 1 0 Name IICTOEN IICTOF IICTOS5 IICTOS4 IICTOS3 IICTOS2 IICTOS1 IICTOS0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7IICTOEN: I C Time-out control 0: Disable 1: Enable 2 Bit 6IICTOF: I2C Time-out flag 0: No time-out occurred 1: Time-out occurred Bit 5~0IICTOS5~IICTOS0: I2C Time-out period selection I2C Time-out clock source is fSUB/32 I2C Time-out period is equal to (IICTOS[5:0] + 1) × Rev. 1.10 156 32 fSUB August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU UART Interface These devices contain an integrated full-duplex asynchronous serial communications UART interface that enables communication with external devices that contain a serial interface. The UART function has many features and can transmit and receive data serially by transferring a frame of data with eight or nine data bits per transmission as well as being able to detect errors when the data is overwritten or incorrectly framed. The UART function possesses its own internal interrupt which can be used to indicate when a reception occurs or when a transmission terminates. The integrated UART function contains the following features: • Full-duplex, asynchronous communication • 8 or 9 bits character length • Even, odd or no parity options • One or two stop bits • Baud rate generator with 8-bit prescaler • Parity, framing, noise and overrun error detection • Support for interrupt on address detect (last character bit=1) • Separately enabled transmitter and receiver • 2-byte Deep FIFO Receive Data Buffer • RX pin wake-up function • Transmit and receive interrupts • Interrupts can be initialized by the following conditions: ♦♦ Transmitter Empty ♦♦ Transmitter Idle ♦♦ Receiver Full ♦♦ Receiver Overrun ♦♦ Address Mode Detect Transmitter Shift Re�ister (TSR) MSB ………………………… TX Re�ister (TXR) Receiver Shift Re�ister (RSR) LSB TXn Pin fSYS fPLL (6MHz) fPLL(1�MHz) fPLL(16MHz) fPLL(�4MHz) RXn Pin MSB ………………………… RX Re�ister (RXR) Ba�d Rate Generator Data to be transmitted LSB B�ffer Data received MCU Data B�s UART Data Transfer Block Diagram – n = 0 or 1 Rev. 1.10 157 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU UART External Pin To communicate with an external serial interface, the internal UARTn has two external pins known as TXn and RXn. The TXn and RXn pins are the UARTn transmitter and receiver pins respectively. The TXn and RXn pin function should first be selected by the corresponding pin-shared function selection register before the UARTn function is used. Along with the UARTENn bit, the TXENn and RXENn bits, if set, will setup these pins to their respective TXn output and RXn input conditions and disable any pull-high resistor option which may exist on the TXn and RXn pins. When the TXn or RXn pin function is disabled by clearing the UARTENn, TXENn or RXENn bit, the TXn or RXn pin will be set to a floating state. At this time whether the internal pull-high resistor is connected to the TXn or RXn pin or not is determined by the corresponding I/O pull-high function control bit. UART Data Transfer Scheme The above diagram shows the overall data transfer structure arrangement for the UARTn interface. The actual data to be transmitted from the MCU is first transferred to the TXRn register by the application program. The data will then be transferred to the Transmit Shift Register from where it will be shifted out, LSB first, onto the TXn pin at a rate controlled by the Baud Rate Generator. Only the TXRn register is mapped onto the MCU Data Memory, the Transmit Shift Register is not mapped and is therefore inaccessible to the application program. Data to be received by the UARTn is accepted on the external RXn pin, from where it is shifted in, LSB first, to the Receiver Shift Register at a rate controlled by the Baud Rate Generator. When the shift register is full, the data will then be transferred from the shift register to the internal RXRn register, where it is buffered and can be manipulated by the application program. Only the TXRn register is mapped onto the MCU Data Memory, the Receiver Shift Register is not mapped and is therefore inaccessible to the application program. It should be noted that the actual register for data transmission and reception, although referred to in the text, and in application programs, as separate TXRn and RXRn registers, only exists as a single shared register in the Data Memory. This shared register known as the TXR_RXRn register is used for both data transmission and data reception. UART Status and Control Registers There are six control registers associated with the UARTn function. The UnSR, UnCR1 and UnCR2 registers control the overall function of the UARTn, while the BRGn register controls the Baud rate. The actual data to be transmitted and received on the serial interface is managed through the TXR_ RXRn data registers. A clock selection register, URFC, is used to select the UARTn Baud Rate generator clock source. Bit Register Name 7 6 5 4 3 2 1 0 URFC — UR1FC2 UR1FC1 UR1FC0 — UR0FC2 UR0FC1 UR0FC0 TXIFn UnSR PERRn NFn FERRn OERRn RIDLEn RXIFn TIDLEn UnCR1 UARTENn BNOn PRENn PRTn STOPSn TXBRKn RX8n TX8n UnCR2 TXENn RXENn BRGHn ADDENn WAKEn RIEn TIIEn TEIEn BRGn BRGn7 BRGn6 BRGn5 BRGn4 BRGn3 BRGn2 BRGn1 BRGn0 TXR_ RXRn TXRXn7 TXRXn6 TXRXn5 TXRXn4 TXRXn3 TXRXn2 TXRXn1 TXRXn0 UARTn Registers List – n = 0 or 1 Rev. 1.10 158 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU TXR_RXRn Register The TXR_RXRn register is the data register which is used to store the data to be transmitted on the TXn pin or being received from the RXn pin. Bit 7 6 5 4 3 2 1 0 Name TXRXn7 TXRXn6 TXRXn5 TXRXn4 TXRXn3 TXRXn2 TXRXn1 TXRXn0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR x x x x x x x x “x”: unknown Bit 7~0TXRXn7~TXRXn0: UARTn Transmit/Receive Data bits URFC Register The URFC register is the clock selection register for the UARTn Baud Rate generator. The Baud Rate generator clock source can come from the system clock and various PLL output clocks. Bit 7 6 5 4 3 2 1 0 Name — UR1FC2 UR1FC1 UR1FC0 — UR0FC2 UR0FC1 UR0FC0 R/W — R/W R/W R/W — R/W R/W R/W POR — 0 0 0 — 0 0 0 Bit 7 Unimplemented, read as “0” Bit 6~4UR1FC2~UR1FC0: UART1 Baud Rate generator clock source select 000: fSYS 001: fPLL – 6MHz 010: fPLL – 12MHz 011: fPLL – 16MHz 100: fPLL – 24MHz 101: Not used 110~111: fSYS Bit 3 Unimplemented, read as “0” Bit 2~0UR0FC2~UR0FC0: UART0 Baud Rate generator clock source select 000: fSYS 001: fPLL – 6MHz 010: fPLL – 12MHz 011: fPLL – 16MHz 100: fPLL – 24MHz 101: Not used 110~111: fSYS Rev. 1.10 159 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU UnSR Register The UnSR register is the status register for the UARTn, which can be read by the program to determine the present status of the UARTn. All flags within the UnSR register are read only and further explanations are given below. Bit 7 6 5 4 3 2 1 0 Name PERRn NFn FERRn OERRn RIDLEn RXIFn TIDLEn TXIFn R/W R R R R R R R R POR 0 0 0 0 1 0 1 1 Bit 7PERRn: Parity error flag 0: No parity error is detected 1: Parity error is detected The PERRn flag is the parity error flag. When this read only flag is “0”, it indicates a parity error has not been detected. When the flag is “1”, it indicates that the parity of the received word is incorrect. This error flag is applicable only if Parity mode (odd or even) is selected. The flag can also be cleared by a software sequence which involves a read to the status register UnSR followed by an access to the RXRn data register. Bit 6NFn: Noise flag 0: No noise is detected 1: Noise is detected The NFn flag is the noise flag. When this read only flag is “0”, it indicates no noise condition. When the flag is “1”, it indicates that the UARTn has detected noise on the receiver input. The NFn flag is set during the same cycle as the RXIFn flag but will not be set in the case of as overrun. The NFn flag can be cleared by a software sequence which will involve a read to the status register UnSR followed by an access to the RXRn data register. Bit 5FERRn: Framing error flag 0: No framing error is detected 1: Framing error is detected The FERRn flag is the framing error flag. When this read only flag is “0”, it indicates that there is no framing error. When the flag is “1”, it indicates that a framing error has been detected for the current character. The flag can also be cleared by a software sequence which will involve a read to the status register UnSR followed by an access to the RXRn data register. Bit 4OERRn: Overrun error flag 0: No overrun error is detected 1: Overrun error is detected The OERRn flag is the overrun error flag which indicates when the receiver buffer has overflowed. When this read only flag is “0”, it indicates that there is no overrun error. When the flag is “1”, it indicates that an overrun error occurs which will inhibit further transfers to the RXRn receive data register. The flag is cleared by a software sequence, which is a read to the status register UnSR followed by an access to the RXRn data register. Bit 3RIDLEn: Receiver status 0: Data reception is in progress (data being received) 1: No data reception is in progress (receiver is idle) The RIDLEn flag is the receiver status flag. When this read only flag is “0”, it indicates that the receiver is between the initial detection of the start bit and the completion of the stop bit. When the flag is “1”, it indicates that the receiver is idle. Between the completion of the stop bit and the detection of the next start bit, the RIDLEn bit is “1” indicating that the UARTn receiver is idle and the RXn pin stays in logic high condition. Rev. 1.10 160 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 2RXIFn: Receive RXRn data register status 0: RXRn data register is empty 1: RXRn data register has available data The RXIFn flag is the receive data register status flag. When this read only flag is “0”, it indicates that the RXRn read data register is empty. When the flag is “1”, it indicates that the RXRn read data register contains new data. When the contents of the shift register are transferred to the RXRn register, an interrupt is generated if RIEn=1 in the UnCR2 register. If one or more errors are detected in the received word, the appropriate receive-related flags NFn, FERRn, and/or PERRn are set within the same clock cycle. The RXIFn flag is cleared when the UnSR register is read with RXIFn set, followed by a read from the RXRn register, and if the RXRn register has no data available. Bit 1TIDLEn: Transmission status 0: Data transmission is in progress (data being transmitted) 1: No data transmission is in progress (transmitter is idle) The TIDLEn flag is known as the transmission complete flag. When this read only flag is “0”, it indicates that a transmission is in progress. This flag will be set to “1” when the TXIFn flag is “1” and when there is no transmit data or break character being transmitted. When TIDLEn is equal to 1, the TXn pin becomes idle with the pin state in logic high condition. The TIDLEn flag is cleared by reading the UnSR register with TIDLEn set and then writing to the TXRn register. The flag is not generated when a data character or a break is queued and ready to be sent. Bit 0TXIFn: Transmit TXRn data register status 0: Character is not transferred to the transmit shift register 1: Character has transferred to the transmit shift register (TXRn data register is empty) The TXIFn flag is the transmit data register empty flag. When this read only flag is “0”, it indicates that the character is not transferred to the transmitter shift register. When the flag is “1”, it indicates that the transmitter shift register has received a character from the TXRn data register. The TXIFn flag is cleared by reading the UARTn status register (UnSR) with TXIFn set and then writing to the TXRn data register. Note that when the TXENn bit is set, the TXIFn flag bit will also be set since the transmit data register is not yet full. UnCR1 Register The UnCR1 register together with the UnCR2 register are the UARTn control registers that are used to set the various options for the UARTn function such as overall on/off control, parity control, data transfer bit length, etc. Further explanation on each of the bits is given below. Bit 7 6 5 4 3 2 1 0 Name UARTENn BNOn PRENn PRTn STOPSn TXBRKn RX8n TX8n R/W R/W R/W R/W R/W R/W R/W R W POR 0 0 0 0 0 0 x 0 “x”: unknown Bit 7UARTENn: UARTn function enable control 0: Disable UARTn; TXn and RXn pins are in a floating state. 1: Enable UARTn; TXn and RXn pins function as UARTn pins The UARTENn bit is the UARTn enable bit. When this bit is equal to “0”, the UARTn will be disabled and the RXn pin as well as the TXn pin will be set in a floating state. When the bit is equal to “1”, the UARTn will be enabled and the TXn and RXn pins will function as defined by the TXENn and RXENn enable control bits. When the UARTn is disabled, it will empty the buffer so any character remaining in the buffer will be discarded. In addition, the value of the baud rate counter will be reset. If the UARTn is disabled, all error and status flags will be reset. Also the TXENn, RXENn, TXBRKn, RXIFn, OERRn, FERRn, PERRn and NFn bits will be cleared, while the Rev. 1.10 161 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU TIDLEn, TXIFn and RIDLEn bits will be set. Other control bits in UnCR1, UnCR2 and BRGn registers will remain unaffected. If the UARTn is active and the UARTENn bit is cleared, all pending transmissions and receptions will be terminated and the module will be reset as defined above. When the UART is re-enabled, it will restart in the same configuration. Bit 6BNOn: Number of data transfer bits selection 0: 8-bit data transfer 1: 9-bit data transfer This bit is used to select the data length format, which can have a choice of either 8-bit or 9-bit format. When this bit is equal to “1”, a 9-bit data length format will be selected. If the bit is equal to “0”, then an 8-bit data length format will be selected. If 9-bit data length format is selected, then bits RX8n and TX8n will be used to store the 9th bit of the received and transmitted data respectively. Bit 5PRENn: Parity function enable control 0: Parity function is disabled 1: Parity function is enabled This bit is the parity function enable bit. When this bit is equal to 1, the parity function will be enabled. If the bit is equal to 0, then the parity function will be disabled. Bit 4PRTn: Parity type selection bit 0: Even parity for parity generator 1: Odd parity for parity generator This bit is the parity type selection bit. When this bit is equal to 1, odd parity type will be selected. If the bit is equal to 0, then even parity type will be selected. Bit 3STOPSn: Number of stop bits selection 0: One stop bit format is used 1: Two stop bits format is used This bit determines if one or two stop bits are to be used. When this bit is equal to “1”, two stop bits format are used. If the bit is equal to “0”, then only one stop bit format is used. Bit 2TXBRKn: Transmit break character 0: No break character is transmitted 1: Break characters transmit The TXBRKn bit is the Transmit Break Character bit. When this bit is equal to “0”, there are no break characters and the TXn pin operats normally. When the bit is equal to “1”, there are transmit break characters and the transmitter will send logic zeros. When this bit is equal to “1”, after the buffered data has been transmitted, the transmitter output is held low for a minimum of a 13-bit length and until the TXBRKn bit is reset. Bit 1RX8n: Receive data bit 8 for 9-bit data transfer format (read only) This bit is only used if 9-bit data transfers are used, in which case this bit location will store the 9th bit of the received data known as RX8n. The BNOn bit is used to determine whether data transfes are in 8-bit or 9-bit format. Bit 0TX8n: Transmit data bit 8 for 9-bit data transfer format (write only) This bit is only used if 9-bit data transfers are used, in which case this bit location will store the 9th bit of the transmitted data known as TX8n. The BNOn bit is used to determine whether data transfes are in 8-bit or 9-bit format. Rev. 1.10 162 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU UnCR2 Register The UnCR2 register is the second of the UARTn control registers and serves several purposes. One of its main functions is to control the basic enable/disable operation if the UARTn Transmitter and Receiver as well as enabling the various UARTn interrupt sources. The register also serves to control the baud rate speed, receiver wake-up function enable and the address detect function enable. Further explanation on each of the bits is given below. Bit 7 6 5 4 3 2 1 0 Name TXENn RXENn BRGHn ADDENn WAKEn RIEn TIIEn TEIEn R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7TXENn: UARTn Transmitter enable control 0: UARTn Transmitter is disabled 1: UARTn Transmitter is enabled The TXENn bit is the Transmitter Enable Bit. When this bit is equal to “0”, the transmitter will be disabled with any pending data transmissions being aborted. In addition the buffers will be reset. In this situation the TXn pin will be set in a floating state. If the TXENn bit is equal to “1” and the UARTENn bit is also equal to 1, the transmitter will be enabled and the TXn pin will be controlled by the UARTn. Clearing the TXENn bit during a transmission will cause the data transmission to be aborted and will reset the transmitter. If this situation occurs, the TXn pin will be set in a floating state. Bit 6RXENn: UARTn Receiver enable control 0: UARTn Receiver is disabled 1: UARTn Receiver is enabled The RXENn bit is the Receiver Enable Bit. When this bit is equal to “0”, the receiver will be disabled with any pending data receptions being aborted. In addition the receiver buffers will be reset. In this situation the RXn pin will be set in a floating state. If the RXENn bit is equal to “1” and the UARTENn bit is also equal to 1, the receiver will be enabled and the RXn pin will be controlled by the UARTn. Clearing the RXENn bit during a reception will cause the data reception to be aborted and will reset the receiver. If this situation occurs, the RX pin will be set in a floating state. Bit 5BRGHn: Baud Rate speed selection 0: Low speed baud rate 1: High speed baud rate The bit named BRGHn selects the high or low speed mode of the Baud Rate Generator. This bit, together with the value placed in the baud rate register, BRGn, controls the baud rate of the UARTn. If the bit is equal to 0, the low speed mode is selected. Bit 4ADDENn: Address detect function enable control 0: Address detection function is disabled 1: Address detection function is enabled The bit named ADDENn is the address detection function enable control bit. When this bit is equal to 1, the address detection function is enabled. When it occurs, if the 8th bit, which corresponds to RX7n if BNOn=0, or the 9th bit, which corresponds to RX8n if BNOn=1, has a value of “1”, then the received word will be identified as an address, rather than data. If the corresponding interrupt is enabled, an interrupt request will be generated each time the received word has the address bit set, which is the 8th or 9th bit depending on the value of the BNOn bit. If the address bit known as the 8th or 9th bit of the received word is “0” with the address detection function being enabled, an interrupt will not be generated and the received data will be discarded. Rev. 1.10 163 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 3WAKEn: RXn pin falling edge wake-up function enable control 0: RXn pin wake-up function is disabled 1: RXn pin wake-up function is enabled The bit enables or disables the receiver wake-up function. If this bit is equal to 1 and the device is in IDLE0 or SLEEP mode, a falling edge on the RXn pin will wake up the device. If this bit is equal to 0 and the device is in IDLE or SLEEP mode, any edge transitions on the RXn pin will not wake up the device. Bit 2RIEn: Receiver interrupt enable control 0: Receiver related interrupt is disabled 1: Receiver related interrupt is enabled The bit enables or disables the receiver interrupt. If this bit is equal to 1 and when the receiver overrun flag OERRn or received data available flag RXIFn is set, the UARTn interrupt request flag will be set. If this bit is equal to 0, the UARTn interrupt request flag will not be influenced by the condition of the OERRn or RXIFn flags. Bit 1TIIEn: Transmitter Idle interrupt enable control 0: Transmitter idle interrupt is disabled 1: Transmitter idle interrupt is enabled The bit enables or disables the transmitter idle interrupt. If this bit is equal to 1 and when the transmitter idle flag TIDLEn is set, due to a transmitter idle condition, the UARTn interrupt request flag will be set. If this bit is equal to 0, the UARTn interrupt request flag will not be influenced by the condition of the TIDLEn flag. Bit 0TEIEn: Transmitter Empty interrupt enable control 0: Transmitter empty interrupt is disabled 1: Transmitter empty interrupt is enabled The bit enables or disables the transmitter empty interrupt. If this bit is equal to 1 and when the transmitter empty flag TXIFn is set, due to a transmitter empty condition, the UARTn interrupt request flag will be set. If this bit is equal to 0, the UARTn interrupt request flag will not be influenced by the condition of the TXIFn flag. Baud Rate Generator To setup the speed of the serial data communication, the UARTn function contains its own dedicated baud rate generator. The baud rate is controlled by its own internal free running 8-bit timer, the period of which is determined by two factors. The first of these is the value placed in the BRGn register and the second is the value of the BRGHn bit within the UnCR2 control register. The BRGHn bit decides, if the baud rate generator is to be used in a high speed mode or low speed mode, which in turn determines the formula that is used to calculate the baud rate. The value in the BRGn register, N, which is used in the following baud rate calculation formula determines the division factor. Note that N is the decimal value placed in the BRGn register and has a range of between 0 and 255. UnCR2 BRGHn Bit 0 fSYS Baud Rate (BR) [64(N+1)] 1 fSYS [16(N+1)] By programming the BRGHn bit which allows selection of the related formula and programming the required value in the BRGn register, the required baud rate can be setup. Note that because the actual baud rate is determined using a discrete value, N, placed in the BRGn register, there will be an error associated between the actual and requested value. The following example shows how the BRGn register value N and the error value can be calculated. Rev. 1.10 164 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU BRGn Register Bit 7 6 5 4 3 2 1 0 Name BRGn7 BRGn6 BRGn5 BRGn4 BRGn3 BRGn2 BRGn1 BRGn0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR x x x x x x x x “x”: unknown Bit 7~0BRGn7~BRGn0: Baud Rate values By programming the BRGHn bit in the UnCR2 register which allows selection of the related formula described above and programming the required value in the BRGn register, the required baud rate can be setup. Calculating the Baud Rate and Error Values For a clock frequency of 4MHz, and with BRGHn set to 0 determine the BRGn register value N, the actual baud rate and the error value for a desired baud rate of 4800. fSYS From the above table the desired baud rate BR = [64(N+1)] fSYS Re-arranging this equation gives N = -1 (BR×64) 4000000 Giving a value for N = -1 = 12.0208 (4800×64) To obtain the closest value, a decimal value of 12 should be placed into the BRGn register. This 4000000 gives an actual or calculated baud rate value of BR = = 4808 [64(12+1)] 4808-4800 Therefore the error is equal to = 0.16% 4800 UART Setup and Control For data transfer, the UARTn function utilizes a non-return-to-zero, more commonly known as NRZ, format. This is composed of one start bit, eight or nine data bits and one or two stop bits. Parity is supported by the UARTn hardware and can be setup to be even, odd or no parity. For the most common data format, 8 data bits along with no parity and one stop bit, denoted as 8, N, 1, is used as the default setting, which is the setting at power-on. The number of data bits and stop bits, along with the parity, are setup by programming the corresponding BNOn, PRTn, PRENn and STOPSn bits in the UnCR1 register. The baud rate used to transmit and receive data is setup using the internal 8-bit baud rate generator, while the data is transmitted and received LSB first. Although the transmitter and receiver of the UARTn are functionally independent, they both use the same data format and baud rate. In all cases stop bits will be used for data transmission. Enabling/Disabling the UART Interface The basic on/off function of the internal UARTn function is controlled using the UARTENn bit in the UnCR1 register. If the UARTENn, TXENn and RXENn bits are set, then these two UARTn pins will act as normal TXn output pin and RXn input pin respectively. If no data is being transmitted on the TXn pin, then it will default to a logic high value. Clearing the UARTENn bit will disable the TXn and RXn pins and these two pins will be used as an I/O or other pin-shared functional pin. When the UARTn function is disabled, the buffer will be reset to an empty condition, at the same time discarding any remaining residual data. Disabling the UARTn will also reset the enable control, the error and status flags with bits TXENn, RXENn, TXBRKn, RXIFn, OERRn, FERRn, PERRn and NFn being cleared while bits TIDLEn, TXIFn and RIDLEn will be set. The remaining control bits in the UnCR1, UnCR2 and BRGn registers will remain unaffected. If the UARTENn bit in the UnCR1 register is cleared while the UARTn is active, then all pending transmissions and receptions will be immediately suspended and the UARTn will be reset to a condition as defined above. If the UARTn is then subsequently re-enabled, it will restart again in the same configuration. Rev. 1.10 165 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Data, Parity and Stop Bit Selection The format of the data to be transferred is composed of various factors such as data bit length, parity on/off, parity type, address bits and the number of stop bits. These factors are determined by the setup of various bits within the UnCR1 register. The BNOn bit controls the number of data bits which can be set to either 8 or 9. The PRTn bit controls the choice if odd or even parity. The PRENn bit controls the parity on/off function. The STOPSn bit decides whether one or two stop bits are to be used. The following table shows various formats for data transmission. The address detect mode control bit identifies the frame as an address character. The number of stop bits, which can be either one or two, is independent of the data length. Start Bit Data Bits Address Bits Parity Bit Stop Bit Example of 8-bit Data Formats 1 8 0 0 1 1 7 0 1 1 1 7 1 0 1 Example of 9-bit Data Formats 1 9 0 0 1 1 8 0 1 1 1 8 1 0 1 Transmitter Receiver Data Format The following diagram shows the transmit and receive waveforms for both 8-bit and 9-bit data formats. UART Transmitter Data word lengths of either 8 or 9 bits can be selected by programming the BNOn bit in the UnCR1 register. When BNOn bit is set, the word length will be set to 9 bits. In this case the 9th bit, which is the MSB, needs to be stored in the TX8n bit in the UnCR1 register. At the transmitter core lies the Transmitter Shift Register, more commonly known as the TSRn, whose data is obtained from the transmit data register, which is known as the TXRn register. The data to be transmitted is loaded into this TXRn register by the application program. The TSRn register is not written to with new data until the stop bit from the previous transmission has been sent out. As soon as this stop bit has been transmitted, the TSRn can then be loaded with new data from the TXRn register, if it is available. It should be noted that the TSRn register, unlike many other registers, is not directly mapped into the Data Memory area and as such is not available to the application program for direct read/write operations. An actual transmission of data will normally be enabled when the TXENn bit is set, but the data will not be transmitted until the TXRn register has been loaded with data and the baud rate generator has defined a shift clock source. However, the transmission can also be initiated by first loading data into the TXRn register, after which the TXENn bit can be set. When a transmission of data begins, the TSRn is normally empty, in which case a transfer to the TXRn register will result in an immediate transfer to the TSRn. If during a transmission the TXENn bit is cleared, the transmission will immediately cease and the transmitter will be reset. The TXn output pin can then be configured as the I/O or other pin-shared function. Rev. 1.10 166 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Transmitting Data When the UARTn is transmitting data, the data is shifted on the TXn pin from the shift register, with the least significant bit LSB first. In the transmit mode, the TXRn register forms a buffer between the internal bus and the transmitter shift register. It should be noted that if 9-bit data format has been selected, then the MSB will be taken from the TX8n bit in the UnCR1 register. The steps to initiate a data transfer can be summarized as follows: • Make the correct selection of the BNOn, PRTn, PRENn and STOPSn bits to define the required word length, parity type and number of stop bits. • Setup the BRGn register to select the desired baud rate. • Set the TXENn bit to ensure that the UARTn transmitter is enabled and the TXn pin is used as a UARTn transmitter pin. • Access the UnSR register and write the data that is to be transmitted into the TXRn register. Note that this step will clear the TXIFn bit. This sequence of events can now be repeated to send additional data. It should be noted that when TXIFn=0, data will be inhibited from being written to the TXRn register. Clearing the TXIFn flag is always achieved using the following software sequence: 1. A UnSR register access 2. A TXRn register write execution The read-only TXIFn flag is set by the UARTn hardware and if set indicates that the TXRn register is empty and that other data can now be written into the TXRn register without overwriting the previous data. If the TEIEn bit is set, then the TXIFn flag will generate an interrupt. During a data transmission, a write instruction to the TXRn register will place the data into the TXRn register, which will be copied to the shift register at the end of the present transmission. When there is no data transmission in progress, a write instruction to the TXRn register will place the data directly into the shift register, resulting in the commencement of data transmission, and the TXIFn bit being immediately set. When a frame transmission is complete, which happens after stop bits are sent or after the break frame, the TIDLEn bit will be set. To clear the TIDLEn bit the following software sequence is used: 1. A UnSR register access 2. A TXRn register write execution Note that both the TXIFn and TIDLEn bits are cleared by the same software sequence. Transmitting Break If the TXBRKn bit is set, then the break characters will be sent on the next transmission. Break character transmission consists of a start bit, followed by 13xN “0” bits, where N=1, 2, etc. If a break character is to be transmitted, then the TXBRKn bit must be first set by the application program and then cleared to generate the stop bits. Transmitting a break character will not generate a transmit interrupt. Note that a break condition length is at least 13 bits long. If the TXBRKn bit is continually kept at a logic high level, then the transmitter circuitry will transmit continuous break characters. After the application program has cleared the TXBRKn bit, the transmitter will finish transmitting the last break character and subsequently send out one or two stop bits. The automatic logic high at the end of the last break character will ensure that the start bit of the next frame is recognized. Rev. 1.10 167 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU UART Receiver The UARTn is capable of receiving word lengths of either 8 or 9 bits can be selected by programming the BNOn bit in the UnCR1 register. When BNOn bit is set, the word length will be set to 9 bits. In this case the 9th bit, which is the MSB, will be stored in the RX8n bit in the UnCR1 register. At the receiver core lies the Receiver Shift Register more commonly known as the RSRn. The data which is received on the RXn external input pin is sent to the data recovery block. The data recovery block operating speed is 16 times that of the baud rate, while the main receive serial shifter operates at the baud rate. After the RXn pin is sampled for the stop bit, the received data in RSRn is transferred to the receive data register, if the register is empty. The data which is received on the external RXn input pin is sampled three times by a majority detect circuit to determine the logic level that has been placed onto the RXn pin. It should be noted that the RSRn register, unlike many other registers, is not directly mapped into the Data Memory area and as such is not available to the application program for direct read/write operations. Receiving Data When the UARTn receiver is receiving data, the data is serially shifted in on the external RXn input pin to the shift register, with the least significant bit LSB first. The RXRn register is a two byte deep FIFO data buffer, where two bytes can be held in the FIFO while the 3rd byte can continue to be received. Note that the application program must ensure that the data is read from RXRn before the 3rd byte has been completely shifted in, otherwise the 3rd byte will be discarded and an overrun error OERRn will be subsequently indicated. The steps to initiate a data transfer can be summarized as follows: • Make the correct selection of the BNOn, PRTn, PRENn and STOPSn bits to define the required word length, parity type and number of stop bits. • Setup the BRGn register to select the desired baud rate. • Set the RXENn bit to ensure that the UARTn receiver is enabled and the RXn pin is used as a UARTn receiver pin. At this point the receiver will be enabled which will begin to look for a start bit. When a character is received, the following sequence of events will occur: • The RXIFn bit in the UnSR register will be set then RXRn register has data available, at least one more character can be read. • When the contents of the shift register have been transferred to the RXRn register and if the RIEn bit is set, then an interrupt will be generated. • If during reception, a frame error, noise error, parity error or an overrun error has been detected, then the error flags can be set. The RXIFn bit can be cleared using the following software sequence: 1. A UnSR register access 2. A RXRn register read execution Rev. 1.10 168 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Receiving Break Any break character received by the UARTn will be managed as a framing error. The receiver will count and expect a certain number of bit times as specified by the values programmed into the BNOn and STOPSn bits. If the break is much longer than 13 bit times, the reception will be considered as complete after the number of bit times specified by BNOn and STOPSn. The RXIFn bit is set, FERRn is set, zeros are loaded into the receive data register, interrupts are generated if appropriate and the RIDLEn bit is set. If a long break signal has been detected and the receiver has received a start bit, the data bits and the invalid stop bit, which sets the FERRn flag, the receiver must wait for a valid stop bit before looking for the next start bit. The receiver will not make the assumption that the break condition on the line is the next start bit. A break is regarded as a character that contains only zeros with the FERRn flag set. The break character will be loaded into the buffer and no further data will be received until stop bits are received. It should be noted that the RIDLEn read only flag will go high when the stop bits have not yet been received. The reception of a break character on the UARTn registers will result in the following: • The framing error flag, FERRn, will be set. • The receive data register, RXRn, will be cleared. • The OERRn, NFn, PERRn, RIDLEn or RXIFn flags will possibly be set. Idle Status When the receiver is reading data, which means it will be in between the detection of a start bit and the reading of a stop bit, the receiver status flag in the UnSR register, otherwise known as the RIDLEn flag, will have a zero value. In between the reception of a stop bit and the detection of the next start bit, the RIDLEn flag will have a high value, which indicates the receiver is in an idle condition. Receiver Interrupt The read only receive interrupt flag, RXIFn, in the UnSR register is set by an edge generated by the receiver. An interrupt is generated if RIEn=1, when a word is transferred from the Receive Shift Register, RSRn, to the Receive Data Register, RXRn. An overrun error can also generate an interrupt if RIEn=1. Managing Receiver Errors Several types of reception errors can occur within the UARTn module, the following section describes the various types and how they are managed by the UARTn. Overrun Error – OERR The RXRn register is composed of a two byte deep FIFO data buffer, where two bytes can be held in the FIFO register, while a 3th byte can continue to be received. Before the 3th byte has been entirely shifted in, the data should be read from the RXRn register. If this is not done, the overrun error flag OERRn will be consequently indicated. In the event of an overrun error occurring, the following will happen: • The OERRn flag in the UnSR register will be set. • The RXRn contents will not be lost. • The shift register will be overwritten. • An interrupt will be generated if the RIEn bit is set. The OERRn flag can be cleared by an access to the UnSR register followed by a read to the RXRn register. Rev. 1.10 169 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Noise Error – NF Over-sampling is used for data recovery to identify valid incoming data and noise. If noise is detected within a frame, the following will occur: • The read only noise flag, NFn, in the UnSR register will be set on the rising edge of the RXIFn bit. • Data will be transferred from the shift register to the RXRn register. • No interrupt will be generated. However this bit rises at the same time as the RXIFn bit which itself generates an interrupt. Note that the NFn flag is reset by a UnSR register read operation followed by an RXRn register read operation. Framing Error – FERR The read only framing error flag, FERRn, in the UnSR register, is set if a zero is detected instead of stop bits. If two stop bits are selected, both stop bits must be high. Otherwise the FERRn flag will be set. The FERRn flag is buffered along with the received data and is cleared in any reset. Parity Error – PERR The read only parity error flag, PERRn, in the UnSR register, is set if the parity of the received word is incorrect. This error flag is only applicable if the parity function is enabled, PRENn=1, and if the parity type, odd or even, is selected. The read only PERRn flag is buffered along with the received data bytes. It is cleared on any reset, it should be noted that the FERRn and PERRn flags are buffered along with the corresponding word and should be read before reading the data word. UART Interrupt Structure Several individual UARTn conditions can generate a UARTn interrupt. When these conditions exist, a low pulse will be generated to get the attention of the microcontroller. These conditions are a transmitter data register empty, transmitter idle, receiver data available, receiver overrun, address detect and an RXn pin wake-up. When any of these conditions are created, if its corresponding interrupt control is enabled and the stack is not full, the program will jump to its corresponding interrupt vector where it can be serviced before returning to the main program. Four of these conditions have the corresponding UnSR register flags which will generate a UARTn interrupt if its associated interrupt enable control bit in the UnCR2 register is set. The two transmitter interrupt conditions have their own corresponding enable control bits, while the two receiver interrupt conditions have a shared enable control bit. These enable bits can be used to mask out individual UARTn interrupt sources. The address detect condition, which is also a UARTn interrupt source, does not have an associated flag, but will generate a UARTn interrupt when an address detect condition occurs if its function is enabled by setting the ADDENn bit in the UnCR2 register. An RXn pin wake-up, which is also a UARTn interrupt source, does not have an associated flag, but will generate a UARTn interrupt if the microcontroller is woken up from IDLE0 or SLEEP mode by a falling edge on the RXn pin, if the WAKEn and RIEn bits in the UnCR2 register are set. Note that in the event of an RXn wake-up interrupt occurring, there will be a certain period of delay, commonly known as the System Start-up Time, for the oscillator to restart and stabilize before the system resumes normal operation. Rev. 1.10 170 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Note that the UnSR register flags are read only and cannot be cleared or set by the application program, neither will they be cleared when the program jumps to the corresponding interrupt servicing routine, as is the case for some of the other interrupts. The flags will be cleared automatically when certain actions are taken by the UARTn, the details of which are given in the UARTn register section. The overall UARTn interrupt can be disabled or enabled by the related interrupt enable control bits in the interrupt control registers of the microcontroller to decide whether the interrupt requested by the UARTn module is masked out or allowed. UnSR Register UnCR2 Register Transmitter Empty Flag TXIFn TEIEn 0 Transmitter Idle Flag TIDLEn TIIEn 0 Receiver Overrun Flag OERRn Receiver Data Available RXIFn RXn Pin Wake-up WAKEn RIEn OR ADDENn 0 0 1 1 1 UART Interrupt Request Flag URnF 0 URnE 0 1 EMI 0 1 Interrupt signal to MCU 1 0 1 RX7n if BNOn=0 RX8n if BNOn=1 1 UnCR2 Register UARTn Interrupt Structure Address Detect Mode Setting the Address Detect function enable control bit, ADDENn, in the UnCR2 register, enables this special function. If this bit is set to 1, then an additional qualifier will be placed on the generation of a Receiver Data Available interrupt, which is requested by the RXIFn flag. If the ADDENn bit is equal to 1, then when the data is available, an interrupt will only be generated, if the highest received bit has a high value. Note that the related interrupt enable control bit and the EMI bit of the microcontroller must also be enabled for correct interrupt generation. The highest address bit is the 9th bit if the bit BNOn=1 or the 8th bit if the bit BNOn=0. If the highest bit is high, then the received word will be defined as an address rather than data. A Data Available interrupt will be generated every time the last bit of the received word is set. If the ADDENn bit is equal to 0, then a Receive Data Available interrupt will be generated each time the RXIFn flag is set, irrespective of the data last but status. The address detection and parity functions are mutually exclusive functions. Therefore, if the address detect function is enabled, then to ensure correct operation, the parity function should be disabled by resetting the parity function enable bit PRENn to zero. ADDENn Bit 9 if BNOn=1 Bit 8 if BNOn=0 UARTn Interrupt Generated 0 √ 1 √ 0 X 1 √ 0 1 ADDENn Bit Function Rev. 1.10 171 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU UART Power Down and Wake-up When the MCU system clock is switched off, the UARTn will cease to function. If the MCU executes the “HALT” instruction and switches off the system clock while a transmission is still in progress, then the transmission will be paused until the UARTn clock source derived from the microcontroller is activated. In a similar way, if the MCU executes the “HALT” instruction and switches off the system clock while receiving data, then the reception of data will likewise be paused. When the MCU enters the IDLE or SLEEP Mode, note that the UnSR, UnCR1, UnCR2, transmit and receive registers, as well as the BRGn register will not be affected. It is recommended to make sure first that the UARTn data transmission or reception has been finished before the microcontroller enters the IDLE or SLEEP mode. The UARTn function contains a receiver RXn pin wake-up function, which is enabled or disabled by the WAKEn bit in the UnCR2 register. If this bit, along with the UARTn enable bit, UARTENn, the receiver enable bit, RXENn and the receiver interrupt bit, RIEn, are all set before the MCU enters the IDLE0 or SLEEP Mode, then a falling edge on the RXn pin will wake up the MCU from the IDLE0 or SLEEP Mode. Note that as it takes certain system clock cycles after a wake-up, before normal microcontroller operation resumes, any data received during this time on the RXn pin will be ignored. For a UARTn wake-up interrupt to occur, in addition to the bits for the wake-up being set, the global interrupt enable bit, EMI, and the UARTn interrupt enable bit, URnE, must be set. If the EMI and URnE bits are not set then only a wake up event will occur and no interrupt will be generated. Note also that as it takes certain system clock cycles after a wake-up before normal microcontroller resumes, the UARTn interrupt will not be generated until after this time has elapsed. USB Interface The USB interface is a 4-wire serial bus that allows communication between a host device and up to 127 max peripheral devices on the same bus. A token based protocol method is used by the host device for communication control. Other advantages of the USB bus include live plugging and unplugging and dynamic device configuration. As the complexity of USB data protocol does not permit comprehensive USB operation information to be provided in this datasheet, the reader should therefore consult other external information for a detailed USB understanding. The devices include a USB interface function allowing for the convenient design of USB peripheral products. Power Plane There are three power planes for these devices and they are USB SIE VDD, VDDIO and the MCU VDD. For the USB SIE VDD will supply all circuits related to USB SIE and be sourced from pin “UBUS”. Once the USB is removed from the USB and there is no power in the USB BUS, the USB SIE circuit is no longer operational. For the Port A and Port B, the power can be supplied by the VDD, V33O or VDDIO pin selected using the IOVC1 and IOVC0 bits in the SYSC register. The PE0 pin is pin-shared with VDDIO pin. The VDDIO function can be selected by the corresponding pin-shared function selection bits. The PE1 pin is pin-shared with UBUS pin and it’s “input” only. Rev. 1.10 172 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU USB Interface Operation To communicate with an external USB host, the internal USB module has the external pins known as UDP and UDN along with the 3.3V regulator output V33O. A Serial Interface Engine(SIE) decodes the incoming USB data stream and transfers it to the correct endpoint buffer memoryknown as the FIFO. The USB module has 8 endpoints, EP0 ~ EP7, and the FIFO size for each endpoint except endpoint 0 can respectively be configured using the UFC0 and UFC1 registers by application programs. All endpoints except endpoint 0 can be configured to have 8, 16, 32 or 64 bytes together with the FIFOn register as the FIFO size. The endpoint 0 has 8-byte FIFO size. The endpoint 0 supports the Control transfer while the endpoint 1 ~ endpoint 7 support the Interrupt or Bulk transfer. As the USB FIFO is assigned from the last bank of the General Purpose Data Memory and has a start address to the upper address, dependent on the FIFO size, if the corresponding data RAM bank is used for both general purpose RAM and the USB FIFO, special care should be taken that the RAM EQU definition should not overlap with the USB FIFO RAM address. The USB FIFO size and definition for IN/OUT control depends upon the UFC0, UFC1, UFIEN and UFOEN registers. n80H General Purpose Data Memory : : nC0H OUT 3 (8 bytes) nC7H nC8H IN 3 (8 bytes) nCFH nD0H OUT 2 (16 bytes) nDFH nE0H IN 2 (16 bytes) nEFH nF0H OUT 1 (8 bytes) nF7H nF8H IN 1 (8 bytes) nFFH n should start from 23 to 16. USB FIFO Size Configuration Example Rev. 1.10 173 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU USB Interface Registers The USB function control is implemented using a series of registers. A series of status registers provide the user with the USB data transfer situation as well as any error conditions. The USB contains its own independent interrupt which can be used to indicate when the USB FIFOs are accessed by the host device or a change of the USB operating conditions including the USB suspend mode, resume event or USB reset occurs. Bit Register Name 7 6 5 4 3 2 1 0 SYSC CLK_ADJ USBDIS RUBUS D4 D3 D2 IOVC1 IOVC0 USB_STAT PS2_CKO PS2_DAO PS2_CKI PS2_DAI SE1 SE0 PU ESD UINT EP7EN EP6EN EP5EN EP4EN EP3EN EP2EN EP1EN EP0EN USC URD SELPS2 PLL SELUSB RESUME URST RMWK SUSP UESR EP7F EP6F EP5F EP4F EP3F EP2F EP1F EP0F UCC RCTRL SYSCLK FSYS16MHZ SUSP2 USBCKEN EPS2 EPS1 EPS0 AWR AD6 AD5 AD4 AD3 AD2 AD1 AD0 WKEN STLI STLI7 STLI6 STLI5 STLI4 STLI3 STLI2 STLI1 STLI0 STLO STLO7 STLO6 STLO5 STLO4 STLO3 STLO2 STLO1 — SIES NMI CRCF — NAK IN OUT ERR ASET MISC LEN0 READY SETCMD E4ODF E3IDF CLEAR TX REQUEST PLLC — — — — — — PLLF — UFIEN SETI7 SETI6 SETI5 SETI4 SETI3 SETI2 SETI1 FIFO_DEF UFOEN SETO7 SETO6 SETO5 SETO4 SETO3 SETO2 SETO1 DATATG UFC0 E3FS1 E3FS0 E2FS1 E2FS0 E1FS1 E1FS0 — — UFC1 E7FS1 E7FS0 E6FS1 E6FS0 E5FS1 E5FS0 E4FS1 E4FS0 FIFO0 D7 D6 D5 D4 D3 D2 D1 D0 FIFO1 D7 D6 D5 D4 D3 D2 D1 D0 FIFO2 D7 D6 D5 D4 D3 D2 D1 D0 FIFO3 D7 D6 D5 D4 D3 D2 D1 D0 FIFO4 D7 D6 D5 D4 D3 D2 D1 D0 FIFO5 D7 D6 D5 D4 D3 D2 D1 D0 FIFO6 D7 D6 D5 D4 D3 D2 D1 D0 FIFO7 D7 D6 D5 D4 D3 D2 D1 D0 USB Interface Registers List Rev. 1.10 174 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU SYSC Register Bit Name 7 6 CLK_ADJ USBDIS 5 4 3 2 1 0 RUBUS D4 D3 D2 IOVC1 IOVC0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7CLK_ADJ: PLL clock automatic adjustment control Discribed elsewhere. Bit 6USBDIS: USB SIE function control 0: SIE enabled 1: SIE disabled This bit is used to control the USB SIE function. When this bit is set to 1, the USB SIE function will be disabled. Bit 5RUBUS: UBUS pin pull low function control 0: Enable 1: Disable Bit 4~2D4~D2: Reserved data bits, should be kept low and cannot be modified. Bit 1~0IOVC1~IOVC0: I/O port A and B power select 00: From VDD 01: From V33O (3.3V) 10: From VDDIO 11: From VDD These bits are used to select the PA and PB pins supply power. The SELUSB bit in the USC register should first be set to 1 before the V33O power can be selected as the PA and PB pins supply power. If the PE0 pin is configured as the VDDIO pin function, then the VDDIO input voltage can be used as the PA and PB pins supply power. No matter which one here is selected as the PA and PB pins supply power, the selected power voltage should be equal to or less than the VDD voltage. USB_STAT Register Bit 7 6 5 4 2 1 0 SE1 SE0 PU ESD R/W W W R R R/W R/W R/W R/W POR 1 1 0 0 0 0 0 0 Name PS2_CKO PS2_DAO PS2_CKI PS2_DAI 3 Bit 7PS2_CKO: Output for driving the UDP/GPIO1 pin when operating in the 3D PS2 mode. Bit 6PS2_DAO: Output for driving the UDN/GPIO0 pin when operating in the 3D PS2 mode. Bit 5PS2_CKI: UDP/GPIO1 Input. Bit 4PS2_DAI: UDN/GPIO0 Input. Bit 3SE1: USB bus SE1 noise indication This bit is used to indicate that the SIE has detected a SE1 noise on the USB bus. This bit is set by SIE and cleared by software. Bit 2SE0: USB bus SE0 noise indication This bit is used to indicate that the SIE has detected a SE1 noise on the USB bus. This bit is set by SIE and cleared by software. Bit 1PU: UDP/UDN pins pull-high function control 0: Disable – no internal pull-high resistor 1: Enable – internal 600kΩ pull-high resistor on UDP/UDN pins Bit 0ESD: ESD issue adjustment control 0: No operation 1: ESD adjustment This bit will be set to 1 when there is an ESD issue. It is set by SIE and cleared by software. Rev. 1.10 175 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU UINT Register Bit 7 6 5 4 3 2 1 0 Name EP7EN EP6EN EP5EN EP4EN EP3EN EP2EN EP1EN EP0EN R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7EP7EN: Endpoint 7 interrupt enable control 0: Disable 1: Enable Bit 6EP6EN: Endpoint 6 interrupt enable control 0: Disable 1: Enable Bit 5EP5EN: Endpoint 5 interrupt enable control 0: Disable 1: Enable Bit 4EP4EN: Endpoint 4 interrupt enable control 0: Disable 1: Enable Bit 3EP3EN: Endpoint 3 interrupt enable control 0: Disable 1: Enable Bit 2EP2EN: Endpoint 2 interrupt enable control 0: Disable 1: Enable Bit 1EP1EN: Endpoint 1 interrupt enable control 0: Disable 1: Enable Bit 0EP0EN: Endpoint 0 interrupt enable control 0: Disable 1: Enable USC Register Bit 7 6 5 Name URD SELPS2 PLL 4 R/W R/W R/W R/W R/W POR 1 0 0 0 3 2 1 0 URST RMWK SUSP R R/W R/W R 0 0 0 0 SELUSB RESUME Bit 7URD: USB reset signal reset function control 0: USB reset signal can not reset MCU 1: USB reset signal will reset MCU Bit 6SELPS2: PS2 mode select 0: PS2 mode is not selected 1: PS2 mode is selected This selection bit is available when the SELUSB selection bit is equal to 0. When the SELUSB selection bit is set low and the SELPS2 bit is set high, the PS2 function is selected and the pin-shared pins, UDP/GPIO1 and UDN/GPIO0, will become the GPIO1 and GPIO0 general purpose I/O functions which can be used to be the DATA and CLK pins for the PS2. However, when the SELPS2 bit is set low, the PS2 function will be disabled and the GPIO1 and GPIO0 output function will also be disabled. Bit 5PLL: PLL circuit enable control Discribed elsewhere. Rev. 1.10 176 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 4SELUSB: USB analog function and V33O enable control 0: USB analog function and the V33O is disabled 1: USB analog function and the V33O is enabled When the SELUSB bit is set high, the USB analog function and V33O functions will both be enabled and the pin-shared pins, UDP/GPIO1 and UDN/GPIO0, will become the UDP and UDN USB functional pins. When this bit is set low, the USB analog function will be disabled, the V33O output will be floating and the UDP/GPIO1 and UDN/GPIO0 pins will become GPIO1 and GPIO0 functional pins. Bit 3RESUME: USB resume indication 0: Resume signal is not asserted or USB device has left the suspend mode 1: Resume signal is asserted and USB device is going to leave the suspend mode When the resume event occurs, this bit will be set high by SIE and then an interrupt will also be generated to wake up the MCU. In order to detect the suspend state, the MCU should set the USBCKEN bit to 1 and clear the SUSP2 bit to 0. When the USB device leaves the suspend mode, the SUSP bit will be cleared to 0 and then the RESUME bit will also be cleared to 0. The resume signal which causes the MCU to wake up should be noted and taken into consideration when the MCU is detecting the suspend mode. Bit 2URST: USB reset indication 0: No USB reset event occurs 1: USB reset event occurs This bit is set and cleared by the SIE. When the URST bit is set high, it indicates that a USB reset event has occurred and a USB interrupt will be generated. Bit 1RMWK: USB remote wake-up command 0: No USB remote wake-up command initiated 1: Initiate USB remote wake-up command The RMEK bit is set to 1 by the MCU to force the USB host leaving the suspend mode. Setting the RMWK bit to 1 will initiate a remote wake-up command. The RMWK bit should be kept high for at least 2μs to make sure that the remote wake-up command is accepted by the SIE. Bit 0SUSP: USB suspend indication 0: USB leaves the suspend mode 1: USB enters the suspend mode This bit is read only and set to 1 by the SIE to indicate that the USB has entered the suspend mode. The corresponding interrupt will also be generated when the SUSP bit changes from low to high. Rev. 1.10 SELUSB SELPS2 USB and PS2 mode description 0 0 1. No mode supported 2. V33O pin not output and it will floating 3. UDN/GPIO0 and UDP/GPIO1 pins cann’t output 0 1 1. PS2 mode 2. V33 O pin output VDD 3. UDN/GPIO0 and UDP/GPIO1 pins will become the GPIO0 and GPIO1 pins, which can output by firmware 1 x 1. USB mode 2. V33O output 3.3V 3. UDN/GPIO0 and UDP/GPIO1 pins will become the UDN and UDP pins 177 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU UESR Register The UESR register is the USB endpoint interrupt status register and is used to indicate which endpoint is accessed and to select the USB bus. The endpoint request flags, EPxF, are used to indicate which endpoints are accessed. If an endpoint is accessed, the related endpoint request flag will be set to “1” and the USB interrupt will occur if the USB interrupt is enabled and the stack is not full. When the active endpoint request flag is serviced, the endpoint request flag has to be cleared to “0” by software. Bit 7 6 5 4 3 2 1 0 Name EP7F EP6F EP5F EP4F EP3F EP2F EP1F EP0F R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0EP7F~EP0F: Endpoint 7~Endpoint 0 access interrupt request flag – EPnF 0: Endpoint n is not accessed 1: Endpoint n has been accessed UCC Register Bit 7 Name RCTRL 6 R/W R/W R/W POR 0 0 5 4 3 2 1 0 SUSP2 USBCKEN EPS2 EPS1 EPS0 R/W R/W R/W R/W R/W R/W 0 0 0 0 0 0 SYSCLK FSYS16MHZ Bit 7RCTRL: 7.5kΩ resistor between UDP and UBUS connection control 0: Disable – no 7.5kΩ resistor is connected between UDP and UBUS lines 1: Enable – 7.5kΩ resistor is connected between UDP and UBUS lines Bit 6SYSCLK: System clock frequency indicator 0: 12MHz clock is used 1: 6MHz clock is used This bit is used to specify the system clock oscillator used by the MCU. If a 6MHz crystal or resonator is used for the device, this bit should be set to 1. If a 12MHz crystal or resonator is used, then this bit should be set to 0. If the 12MHz HIRC is used, then this bit must be set to 0. Bit 5FSYS16MHZ: MCU System clock select 0: System clock comes from HXT or HIRC 1: System clock comes from PLL output – 16MHz Bit 4SUSP2: USB suspend mode current reduction control 0: Current reduction is disabled in suspend mode 1: Current reduction is enabled in suspend mode The current can be reduced to meet the USB standard specification if this bit is set to 1 when entering the suspend mode. Bit 3USBCKEN: USB clock enable control 0: Disable 1: Enable Bit 2~0UPS2~UPS0: Endpoint FIFO access selection 000: Endpoint 0 FIFO is selected 001: Endpoint 1 FIFO is selected 010: Endpoint 2 FIFO is selected 011: Endpoint 3 FIFO is selected 100: Endpoint 4 FIFO is selected 101: Endpoint 5 FIFO is selected 110: Endpoint 6 FIFO is selected 111: Endpoint 7 FIFO is selected Rev. 1.10 178 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU AWR Register The AWR register contains the USB device address and the remote wake up function control bit. The initial value of the USB device address is “00H”. The address value extracted from the USB host command is immediately loaded into this register or not is determined by the ASET bit in the SIES register. Bit 7 6 5 4 3 2 1 0 Name AD6 AD5 AD4 AD3 AD2 AD1 AD0 WKEN R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~1AD6~AD0: USB device address bit 6 ~ bit 0 Bit 0WKEN: USB remote wake-up function enable control 0: Disable 1: Enable STLI/STLO Registers The STLI/STLO registers show whether the corresponding endpoint has worked properly or not. As soon as an endpoint improper IN/OUT operation occurs, the related bit in the STLI/STLO registers has to be set high by application program. The STLI/STLO registers content will be cleared by a USB reset signal and a setup token event. • STLI Register Bit 7 6 5 4 3 2 1 0 Name STLI7 STLI6 STLI5 STLI4 STLI3 STLI2 STLI1 STLI0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0STLI7~STLI0: USB endpoint n FIFO IN operation stall indication 0: Endpoint n FIFO IN operation is not stalled 1: Endpoint n FIFO IN operation is stalled The STLIn bit is set by user when the USB endpoint n is stalled. The STLIn bit is cleared by a USB reset signal. For endpoint 0 the STLI0 bit can also be cleared by a SETUP token. • STLO Register Bit 7 6 5 4 3 2 1 0 Name STLO7 STLO6 STLO5 STLO4 STLO3 STLO2 STLO1 — R/W R/W R/W R/W R/W R/W R/W R/W — POR 0 0 0 0 0 0 0 — Bit 7~1STLO7~STLO1: USB endpoint 7~endpoint 1 FIFO OUT operation stall indication 0: Endpoint n FIFO OUT operation is not stalled 1: Endpoint n FIFO OUT operation is stalled The STLOn bit is set by user when the USB endpoint n is stalled. The STLOn bit is cleared by a USB reset signal. Bit 0 Rev. 1.10 Unimplemented, read as "0" 179 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU SIES Register The SIES register is used to indicate the present signal state which the SIE receives and also control whether the SIE changes the device address automatically or not. Bit 7 6 5 4 3 2 1 0 Name NMI CRCF — NAK IN OUT ERR ASET R/W R/W R/W — R/W R R/W R/W R/W POR 0 0 — 0 0 0 0 0 Bit 7NMI: Endpoint 0 NAK token interrupt mask control 0: Endpoint 0 NAK token interrupt is not masked 1: Endpoint 0 NAK token interrupt is masked If this bit is set to 1, the interrupt will not be generated when the device sends a NAK token to the USB host from endpoint 0. Otherwise, the endpoint 0 NAK token interrupt will be generated if the corresponding endpoint interrupt control is enabled when this bit is set to 0 and the device endpoint 0 sends a NAK token to the USB host. Bit 6CRCF: Transfer error indication 0: No USB transfer error occurs 1: USB transfer error occurs The error conditions include the CRC error, PID error and Bit stuffing error. This bit is set by hardware and cleared by software. Bit 5 Unimplemented, read as “0” Bit 4NAK: SIE No-Response indication 0: SIE responds normally 1: SIE no-response This bit is used to indicate whether the SIE responds normally or not. If there are error conditions detected by the SIE, the SIE will have no response to the USB token. Note that this bit is set by the SIE and cleared by application programs. Bit 3IN: IN token indication 0: The received token packet is not IN token 1: The received token packet is IN token The IN bit is used to indicate whether the current token packet received from the USB host is IN token or not. Bit 2OUT: OUT token indication 0: The received token packet is not OUT token 1: The received token packet is OUT token The OUT bit is used to indicate whether the token received from the USB host is OUT token or not except the OUT zero length token. This bit should be cleared to 0 by application program after an OUT data has been read. Note that this bit will also be cleared when the next valid SETUP token is received. Bit 1ERR: FIFO access error indication 0: No error occurs 1: Error occurs This bit is used to indicate whether the USB bus errors, such as CRC error, PID error or bit stuffing error, etc., has occurred or not when the FIFO is accessed. This bit is set by SIE and cleared by application program. Rev. 1.10 180 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 0ASET: Device address update control 0: Device address is immediately updated when an address is written into the AWR register 1: Device address is updated after the device IN token data has completely been read by the USB host This bit is used to configure the SIE to automatically change the device address by the value stored in the AWR register. When this bit is set to “1” by firmware, the SIE will update the device address by the value stored in the AWR register after the USB host has successfully read the data from the device by an IN operation. Otherwise, when this bit is cleared to “0”, the SIE will update the device address immediately after an address is written to the AWR register. Therefore, in order to operate properly, the firmware has to clear this bit after a next valid SETUP token is received. MISC Register Bit 7 6 5 4 3 2 1 0 Name LEN0 READY SETCMD E4ODF E3IDF CLEAR TX REQUEST R/W R R R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7LEN0: Zero-length packet indication 0: The received packet is not zero-length packet 1: The received packet is zero-length packet This bit is used to show whether the USB host sends a zero-length packet or not. This bit is set by hardware and cleared by a read operation to the corresponding FIFO. Bit 6READY: Endpoint FIFO ready indication 0: The desired endpoint FIFO is not ready 1: The desired endpoint FIFO is ready Bit 5SETCMD: SETUP command indication 0: The data in the endpoint 0 FIFO is not SETUP token 1: The data in the endpoint 0 FIFO is SETUP token This bit is set by hardware and cleared by application program. Bit 4E4ODF: Endpoint 4 output FIFO size doubling control 0: Single buffer 1: Double buffer Bit 3E3IDF: Endpoint 3 input FIFO size doubling control 0: Single buffer 1: Double buffer Bit 2CLEAR: FIFO clear function enable control 0: No operation 1: Clear the requested endpoint FIFO This bit is used to clear the requested FIFO even if the corresponding FIFO is not ready. The CLEAR bit should be set to 1 to generate a positive pulse with a pulse width of 2μs to clear the requested FIFO and then clear this bit to zero. Bit 1TX: Data transfer direction indication 0: MCU read data from the USB FIFO 1: MCU wirte data to the USB FIFO This bit defines the data transfer direction between the MCU and USB endpoint FIFO. When the TX bit is set to 1, it means that the MCU wants to write data to the USB endpoint FIFO. After the MCU write operation has completed, this bit has to be cleared to 0 before terminating the FIFO request to indicate the end of the data transfer. For a MCU read operation this bit has to be cleared to 0 to indicate that the MCU wants to read data from the USB endpoint FIFO. Then this bit has to be set to 1 before terminating the FIFO request to indicate the end of the data transfer after an MCU read operation completion. Rev. 1.10 181 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 0REQUEST: FIFO request control 0: No reqeust or request completion 1: Request desired FIFO This bit is used to request an operation of the desired endpoint FIFO. After selecting the desired endpoint FIFO, the FIFO can be requested by setting this bit high. Then this bit should be cleared to zero after the operation completion. PLLC Register Bit 7 6 5 4 3 2 1 0 Name — — — — — — PLLF — R/W — — — — — — R — POR — — — — — — 0 — Bit 7~2 Unimplemented, read as “0” Bit 1PLLF: PLL clock stable flag 0: PLL clock unstable 1: PLL clock stable When the PLL bit in the USC register is clear to 0 to enable the PLL circuit, this bit will first be cleared to 0 and then be set to 1 after the PLL clock is stable. The PLL stable time is equal to 2560 PLL clock cycles, 2560 fPLL, after the PLL circuit is enabled. Bit 0 Unimplemented, read as “0” UFIEN Register Bit 7 6 5 4 3 2 1 0 Name SETI7 SETI6 SETI5 SETI4 SETI3 SETI2 SETI1 FIFO_DEF R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7SETI7: Endpoint 7 input FIFO enable control 0: Disable 1: Enable Bit 6SETI6: Endpoint 6 input FIFO enable control 0: Disable 1: Enable Bit 5SETI5: Endpoint 5 input FIFO enable control 0: Disable 1: Enable Bit 4SETI4: Endpoint 4 input FIFO enable control 0: Disable 1: Enable Bit 3SETI3: Endpoint 3 input FIFO enable control 0: Disable 1: Enable Bit 2SETI2: Endpoint 2 input FIFO enable control 0: Disable 1: Enable Bit 1SETI1: Endpoint 1 input FIFO enable control 0: Disable 1: Enable Bit 0FIFO_DEF: FIFO configuration redefine enable control 0: Disable 1: Enable If this bit is set to 1, the SIE will redefine the FIFO configuration. Then this bit will be Rev. 1.10 182 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU automatically cleared to 0 by the SIE. UFOEN Register Bit 7 6 5 4 3 2 1 0 Name SETO7 SETO6 SETO5 SETO4 SETO3 SETO2 SETO1 DATATG R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7SETO7: Endpoint 7 output FIFO enable control 0: Disable 1: Enable Bit 6SETO6: Endpoint 6 output FIFO enable control 0: Disable 1: Enable Bit 5SETO5: Endpoint 5 output FIFO enable control 0: Disable 1: Enable Bit 4SETO4: Endpoint 4 output FIFO enable control 0: Disable 1: Enable Bit 3SETO3: Endpoint 3 output FIFO enable control 0: Disable 1: Enable Bit 2SETO2: Endpoint 2 output FIFO enable control 0: Disable 1: Enable Bit 1SETO1: Endpoint 1 output FIFO enable control 0: Disable 1: Enable Bit 0DATATG: Data token toggle control 0: DATA0 will be sent first 1: DATA1 will be sent first This bit is used to select the Data token toggle bit. When this bit is cleared to 0, a DATA0 will first be sent in the following IN or OUT Data pipe for the requested endpoint FIFO. Otherwise, a DATA1 will be sent first followed by the successive IN or OUT data transfer. Rev. 1.10 183 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU UFC0 Register Bit 7 6 5 4 3 2 1 0 Name E3FS1 E3FS0 E2FS1 E2FS0 E1FS1 E1FS0 — — R/W R/W R/W R/W R/W R/W R/W — — POR 0 0 0 0 0 0 — — Bit 7~6E3FS1~E3FS0: Endpoint 3 FIFO size selection 00: 8 bytes 01: 16 bytes 10: 32 bytes 11: 64 bytes Bit 5~4E2FS1~E2FS0: Endpoint 2 FIFO size selection 00: 8 bytes 01: 16 bytes 10: 32 bytes 11: 64 bytes Bit 3~2E1FS1~E1FS0: Endpoint 1 FIFO size selection 00: 8 bytes 01: 16 bytes 10: 32 bytes 11: 64 bytes Bit 1~0 Unimplemented, read as “0” UFC1 Register Bit 7 6 5 4 3 2 1 0 Name E7FS1 E7FS0 E6FS1 E6FS0 E5FS1 E5FS0 E4FS1 E4FS0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~6E7FS1~E7FS0: Endpoint 7 FIFO size selection 00: 8 bytes 01: 16 bytes 10: 32 bytes 11: 64 bytes Bit 5~4E6FS1~E6FS0: Endpoint 6 FIFO size selection 00: 8 bytes 01: 16 bytes 10: 32 bytes 11: 64 bytes Bit 3~2E5FS1~E5FS0: Endpoint 5 FIFO size selection 00: 8 bytes 01: 16 bytes 10: 32 bytes 11: 64 bytes Bit 1~0E4FS1~E4FS0: Endpoint 4 FIFO size selection 00: 8 bytes 01: 16 bytes 10: 32 bytes 11: 64 bytes Rev. 1.10 184 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU FIFOn Registers The FIFOn Register is used for data transactions storages between the USB device and the USB host. The MCU reads data from or writes data to the FIFOn via the specific combination of the corresponding control and selection bits. Name Type POR FIFO0 R/W xxxx xxxx Endpoint 0 Data Pipe Descriptions FIFO1 R/W xxxx xxxx Endpoint 1 Data Pipe FIFO2 R/W xxxx xxxx Endpoint 2 Data Pipe FIFO3 R/W xxxx xxxx Endpoint 3 Data Pipe FIFO4 R/W xxxx xxxx Endpoint 4 Data Pipe FIFO5 R/W xxxx xxxx Endpoint 5 Data Pipe FIFO6 R/W xxxx xxxx Endpoint 6 Data Pipe FIFO7 R/W xxxx xxxx Endpoint 7 Data Pipe “x”: unknown USB Suspend Mode and Wake-up USB Suspend Mode If there is no signal on the USB bus for over 3ms, the USB device will enter the suspend mode. The Suspend flag, SUSP, in the USC register will then be set high and an USB interrupt will be generated to indicate that the device should jump to the suspend state to meet the requirements of the USB suspend current specification. In order to meet the requirements of the suspend current; the firmware should disable the USB clock by clearing the USBCKEN bit to “0”. The suspend mode current can be further descreased by setting the SUSP2 bit in the UCC register. USB Host Wake-up When the resume signal is asserted by the USB host, the device will be woken up by the USB interrupt and the RESUME bit in the USC register will be set. To ensure correct device operation, the application program should set the USBCKEN bit high and the USB host will start to communicate with the USB device. Then the SUSP2 bit will be cleared low together with the RESUME bit when the USB device actually leaves the suspend mode. Therefore, when the device detects the suspend bit, SUSP2, the resume bit, RESUME, should be monitored and taken into consideration. SUSP RESUME USB_INT Suspend and Host Wake-up Rev. 1.10 185 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU USB Remote Wake-up As the USB device has a remote wake-up function, the USB devive can wake up the USB host by sending a remote wake-up pulse which is generated by setting the RMWK bit high and then clearing it low after 2μs later. Once the USB host receives a remote wake-up signal from the USB device, the host will send a resume signal to device. SUSP 2µs (Min.) RMWK RESUME 2.5ms (Min.) USB_INT Suspend and Remote Wake-up USB Interrupts Several USB conditions can generate an USB interrupt. When one of these conditions exists, an interrupt pulse will be generated to get the attention of the microcontroller. These conditions are the USB suspended, USB resumed, USB reset and USB endpoint FIFO access events. When the USB interrupt caused by any of these conditions occurs, if the corresponding interrupt control is enabled and the stack is not full, the program will jump to the corresponding interrupt vector where it can be serviced before returning to the main program. For the USB Endpoint FIFO access event, there are the corresponding indication flags to indicate which endpoint FIFO is accessed. As the Endpoint FIFO access flag is set, it will generate a USB interrupt if the associated Endpoint FIFO pipe and interrupt control are both enabled. The Endpoint FIFO access flags should be cleared by the application program. As the USB suspended or USB resume condition occurs, the corresponding indication flag, known as SUSP and RESUME bits, will be set and a USB interrupt will directly generate without enabling the associated interrupt control bit. The SUSP and RESUME bits are read only and set or cleared by the USB SIE. For a USB interrupt occurred to be serviced, in addition to the bits for the corresponding interrupt enable control in USB module being set, the global interrupt enable control and the related interrupt enable control bits in the host MCU must also be set. If these bits are not set, then no interrupt will be serviced. Rev. 1.10 186 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU DC/DC Converter and LDO The series devices contains a DC/DC Converter and an LDO to provide the power supply for the Smart Card interface pins and the external Smart Card. The DC/DC Converter is a PFM step-up DC/DC converter with high efficiency and low ripple. It requires only three external components to provide an output voltage of either 3.8V or 5.5V selected by the DC/DC output voltage selection bit VSELin the DC2DC register. The DC/DC voltage output is connected to an external pin as well as being internally connected to the LDO input. It also contains an enable control bit, DCEN, in the DC2DC register to reduce power consumption when in the power down mode. If the Smart Card voltage output is switched to 0V by clearing the selection bits VC[1:0] in the CCR register, the DC/ DC converter will automatically be turned off even if the enable control bit DCEN is set to 1. The LDO is a three-terminal high current low voltage dropout regulator with over current protection. It supports three output voltages of 1.8V, 3.0V or 5.0V selected by the Smart Card Voltage selection bits VC1 and VC0 in the CCR register. It can deliver a minimum output current of 35mA, 55mA and 55mA when the LDO output voltage is 1.8V, 3.0V and 5.0V respectively. 100μH/2Ω 10µF 0.1µF AVDD SELF 0.1µF VO CRDVCC DC/DC Converter CVSS DCEN 47µF LDO VSEL 10µF VC[1:0] 0.1µF CRST VSS VDD Smart Card Interface pins CC8 CDET DC/DC Converter and LDO Diagram DC2DC Register Bit 7 6 5 4 3 2 1 0 Name — — — — — — DCEN VSEL R/W — — — — — — R/W R/W POR — — — — — — 0 0 Bit 7~2 Unimplemented, read as “0” Bit 1DCEN: DC/DC converter enable control 0: Disable 1: Enable This bit is used to control the DC/DC converter function. If this bit is set to 1, the DC/ DC output voltage is selected by the VSEL selection bit. If this bit is cleared to 0, the DC/DC converter function is disabled and the output voltage is equal to the value of (VDD–VDIODE). Bit 0VSEL: DC/DC converter output voltage selection 0: 3.8V 1: 5.5V Rev. 1.10 187 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Smart Card Interface The series devices contains a Smart Card Interface compatible with the ISO 7816-3 standard. This interface includes the Card Insertion/Removal detection, UART interface control logic and data buffers, Power control circuits, internal Timer Counters and control logic circuits to perform the required Smart Card operations. The Smart Card interface acts as a Smart Card Reader to facilitate communication with the external Smart Card. The overall functions of the Smart Card interface is control by a series of registers including control and status registers. As the complexity of ISO7816-3 standard data protocol does not permit comprehensive specifications to be provided in this datasheet, the reader should therefore consult other external information for a detailed understanding of this standard. fCCLK SMCEN Elementary Time Unit (ETU) fETU CRDVCC CRST fGTC fWTC UART TX/RX buffers Waiting Time Counter (WTC) Interrupt Registers Control Registers fETU UART control circuits Power Control Guard Time Counter (GTC) Clock Control CCLK CRDVCC CIO I/O Control CC4 VDD Card Detection Interrupt to MCU CC8 CDET Interface Pins To communicate with an external Smart Card, the internal Smart Card interface has a series of external pins known as CRDVCC, CRST, CCLK, CIO, CC4, CC8 and CDET. The CRDVCC pin is the power supply pin of the external Smart Card and the Smart Card interface pins described above except the CDET pin. It can output several voltage levels as selected by the VC1 and VC0 selection bits. The CRST pin is the reset output signal which is used to reset the external Smart Card. Together with the internal CRST control bit the MCU can control the CRST pin level by writing specific data to the CRST bit and obtain the CRST pin status by reading the CRST bit. The CCLK pin is the clock output signal used to communicate with the external Smart Card together with the serial data pin, CIO. The operation of CCLK and CIO can be selected as the UART mode automatically driven by the UART control circuits, or the Manual mode controlled by configuring the internal CCLK and CIO bits respectively by the application program. The CDET pin is the external Smart Card detection input pin. When the external Smart Card is inserted or removed, it can be detected and generate an interrupt signal which is sent to MCU if the corresponding interrupt control bit is enabled. The CC4 and CC8 pins are used as I/O pins and are controlled by the corresponding CC4 and CC8 bits. Rev. 1.10 188 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Card Detection If an external Smart Card is inserted, the internal card detector can detect this insertion operation and generate a Card insertion interrupt. When the Card is present and detected, the power-on sequence for the external Smart Card should be activated by the application programs to supply power for the external Smart Card. Similarly, if the Card is removed, the internal card detector can also detect the removal and consequently generate a Card removal interrupt. Like the Card insertion operation, the Card Removal deactivation procedure defined in the ISO 7816-3 standard should be activated by the application programs. The card detector can support two kinds of card detect switch mechanisms. One is a normally open switch mechanism when the card is not present and the other is a normally closed switch mechanism. After noting which card detect switch mechanism type is used, the card switch selection should be configured by setting the selection bit CDET in the CCR Register to correctly detect the Card presence. No matter what type of the card switch is selected by configuring the CDET bit, the Card Insertion/Removal Flag, CIRF, in the CSR register will be set to ″1″ when the card is actually present on the CDET pin and shoule be clear to “0” by the application program. Note that there is no hardware debounce circuits in the card detector. Any change of the CDET pin level will cause the CIRF bit to change. The required debounce time should be handled by the application program. There is a pull-high resistor integrated in the card detector. A CDET pin pull-high resistor enable control bit, RCDET, in the ISOC register can determine whether the pull high resistor is internally connected to the CDET pin or not. Internal Time Counter – ETU, GTC, WTC For proper data transfer, some timing purposed setting procedures must be executed before the Smart Card Interface can begin to communicate with the external card. There are three internal counters named Elementary Time Unit, ETU, Guard Time Counter, GTC, and Waiting Time Counter, WTC which are used for the timing related functions in the Smart Card interface operation. Elementary Time Unit – ETU The Elementary Time Unit, ETU, is an 11-bit up-counting counter and generates the clock, denoted as fETU to be used as the operating frequency for the UART transmission and reception in the Smart Card interface. The clock source of the ETU named as fCCLK comes from the fCRD clock and the frequency of fCCLK can be fCRD or fCRD/2 which is selected using the SMF bit in the ISOC register. The fCRD clock is derived from the high speed clock, fH, and the fCRD frequency can be equal to the frequency of fH, fH/2, fH/3 or fH/4 selected by the Smart Card clock source selection bits, CRDCKS1 and CRDCKS0. The data transfer of the UART interface is a character frame based protocol, which basically consists of a Start bit, 8-bit data and a Parity bit. The time period tETU (1/fETU), generated by the ETU, is the time unit for UART character bit. There are two registers related to the ETU known as the low byte ETU register CETU0 and the high byte ETU register CETU1, which store the expected contents of the ETU. Each time the high byte ETU register CETU1 is written, the ETU will reload the new written value and restart counting. The elementary time unit tETU is obtained from the following formula. tETU= Rev. 1.10 F D × 1 f , F: clock rate conversion integer D: baud rate adjustment integer f : clock rate of Smart Card 189 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU The values of F and D, as they appear in the above formula, will be obtained from the Answer to-Reset packet sent from the external Smart Card to the Smart Card interface, the first time the external Smart Card is inserted. When the Smart Card interface receives this information, the values which should be written into the CETU0 and CETU1 can be calculated by F/D. As the value of the ETU registers is obtained by the above formula, the calculation results of the value may not be an integer. If the calculation result is not an integer and is less than the integer n but greater than the integer (n-1), either the integer n or (n-1) should be written into the CETU0 and CETU1 registers depending upon whether the result is closer to n or (n-1). The integer n mentioned here is a decimal. If the calculation result is close to the value of (n-0.5), the compensation mode should be enabled by setting the compensation enable control bit COMP in the CETU1 register to 1 for successful data transfer. When the result is close to the value of (n-0.5) and the compensation mode is enabled, the value written into the CETU0 and CETU1 registers should be n and then the ETU will generate the time unit sequence with n clock cycles and next (n-1) clock cycles alternately and so on. This results in an average time unit of (n-0.5) clock cycles and allows the time granularity down to a half clock cycle. Note that the ETU will reload the ETU registers value and restart counting at the time when the Start bit appears in the UART mode. Start bit Parity bit Data bits CIO P tETU Character n n n n n n n n n n COMP=0 (CETU=n) (1 tETU=n clocks) COMP=1 n n-1 n n-1 n n-1 n n-1 n n-1 Character Frame and Compensation Mode Guard Time Counter – GTC The Guard Time Counter, GTC, is a 9-bit up-counting counter and generates the minimum time duration known as a character frame denoted as tGTC between two successive characters in a UART transmission. The clock source of the GTC comes from the ETU output clock named fETU. The character transmission rate of the UART interface is controlled by tGTC generated by the GTC. There are two registers related to the GTC known as the low byte GTC register, CGT0, and the high byte GTC register, CGT1, which store the expected GTC value. The GTC value will be reloaded at the end of the current guard time period. Note that the guard time between the last character received from the Smart Card and the next character transmitted by the Smart Card interface (Smart Card reader) should be managed by the application program. Rev. 1.10 190 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Waiting Time Counter – WTC The Waiting Time Counter, WTC, is a 24-bit down-counting counter and generates a maximum time duration denoted as tWTC for the data transmission. The WTC clock source comes from the ETU output clock named fETU. The data transfer is categorized into 2 types. One is the Character transfer which means each data transmission or reception is one character. The other is the Blocks transfer which means each data transmission or reception is more than one character. The information related to the data transfer type or the number of the characters to be transferred is contained in the Answerto-Reset packet. There are three data registers for the WTC known as the low byte WTC register CWT0, the middle byte WTC register CWT1 and the high byte WTC register CWT2, which are used to store the expected WTC values. The WTC can be used in both UART mode and Manual mode and can reload the value at specific conditions. The WTC function is controlled by the WTEN bit in the CCR register. When the UART interface is set to be operated in the UART mode and the WTC is enabled, the updated CWT value will be loaded into the WTC as the Start bit is detected. If the UART interface is set to be operated in the Manual mode and the WTC is enabled, the updated CWT value will immediately be loaded into the WTC once the CWTn registers are written into with a new vlaue. Regardless of whether it is in the UART mode or Manual mode, if the WTEN bit is cleared to ″0″, the updated CWT value will not be loaded into the WTC until the WTEN bit is again set to 1 and the WTC underflows from the current loaded value. When the transfer type is configured as a Character transfer, the WTC will generate the maximum timeout period of the Character Waiting Time, CWT. If the transfer type is configured as a Block transfer, the WTC will generate the Character Waiting Time, CWT, except for the last character. The Block Waiting Time, BWT, should be loaded into the WTC data registers before the Start bit of the last transmitted character occurs. As the Start bit of the last transmitted character occurs, the BWT value will be load into the WTC. Then the Smart Card may be expected to transmit data to the Smart Card interface in the BWT duration. If the Smart Card does not transmit any data characters, the WTC will underflow. When the WTC underflows, the corresponding request flag WTF in the CSR register will be set. The Waiting Time Underflow pending flag WTP in the CIPR register will also be set if the interrupt enable control bit WTE in the CIER register is set. Then an interrupt will be generated to notify the MCU that the Smart Card has not responded to the Smart Card reader. Note that if the WTC value is set to zero, the WTF bit will be equal to ″1″. Start bit Program the CWT Program the BWT Smart Card Interface Char 0 Char 1 Char n Smart Card Char 0 BWT WTC is reloaded on Start bit Rev. 1.10 191 Char 1 CWT Start bit August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Smart Card UART Mode Data transfer with the external Smart Card is implemented into two operating modes. One is the UART mode while the other is the Manual mode. The data transfer mode is selected by the UART mode selection bit, UMOD, in the CCR register. When the UMOD bit is set to 1, the UART mode is enabled and data transfer operates in the UART mode. Otherwise, data transfer operates in the Manual mode if the UMOD bit is set to 0. The UART interface is a half-duplex interface and communicates with the external Smart Card via the CCLK and CIO pins. The CIO pin can be selected to be connected to a pull high resistor by the RCIO bit in the ISOC register. After a reset condition the UART function is in the reception mode but the UART mode is disabled. When the UART mode is selected, data transfer is driven by the UART circuits automatically through the CCLK and CIO pins. There are two data registers related to data transmission and reception, CTXB and CRXB, which store the data to be transmitted and received respectively. If a character is written into the CTXB register in the UART mode, the UART interface will automatically switch to the transmission mode from the reception mode after a reset. When the UART transmission or reception has finished, the corresponding request flag named TXCF or RXCF is set to 1. If the transmit buffer is empty, the transmit buffer empty flag, TXBEF, will be set to 1. The UART interface supports a parity generator and a parity check function. As the parity error occurs during a data transfer, the corresponding request flag named, PARF, in the CSR register will be set to 1. Once the PARF bit is set to 1, the Parity error pending flag PARP in the CIPR register will be set to 1 if the relevant interrupt control bit is enabled. Then an interrupt signal will be generated and sent to the MCU. There is a Character Repetition function supported by the UART interface when a parity error occurs. The Character repetition function is enabled by setting the CREP bit to 1 and then the repetition function is activated when the parity error occurs during data transfers. The repetition times can be selected to be 4 or 5 times by the RETRY45 bit in the ISOC register. When the CREP bit is set to 1 and the repetition times is set to 4 times, the UART interface, if in the transmission mode, will transmit the data repeatedly for 4 times at most when an error signal occurs. If the data transmitted by the UART interface is received by the Smart Card receiver without a parity error during these 4 transmissions, the transmission request flag, TXCF, of the UART interface will be set to 1 and the PARF bit will be cleared to 0. If the UART interface is informed that there is still an error signal during the 4 transmissions, the parity error flag PARF of the UART interface will be set to 1 at the end of the 4th transmission but the transmission request flag TXCF will not be set. If the UART interface is in the reception mode together with the CREP bit being set to 1, it will inform the external Smart Card transmitter that there is a parity error for at most 4 times. If the data transmitted by the external Smart Card transmitter is received by the UART interface without a parity error during the 4 receptions, the reception request flag, RXCF, of the UART interface will be set to 1 and the PARF bit will be cleared to 0. If there is still a parity error during the 4 data receptions, the UART interface will inform the external Smart Card and the parity error flag, PARF, of the UART interface will be set to 1 at the end of the 4th reception as well as the reception request flag, RXCF. If the CREP bit is set to 0 and the UART interface is in the reception mode, both the PARF and RXCF bits will be set to 1 when the data with parity error has been received but the character repetition will not be activated. If the UART interface is in the transmission mode and the CREP bit is set to 0, it acts as a normal transmitter and the TXCF bit is set to 1 after the data has been transmitted. It has no effect on PARF bit. Rev. 1.10 192 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU When data is selected to be transferred in the Manual mode by setting the UMOD bit to 0, the data is controlled by the control bit, CIO, in the CCCR register. The value of the CIO bit will be reflected immediately on the CIO pin in the Manual mode. Note that in the Manual mode the character repetition function is not available as well as the related flags and all the data transfer is handled by the application program. The clock used to drive the external Smart Card that appears on the CCLK pin can be the fCCLK clock which is derived from the internal clock source named as the fCRD clock or the control bit CCLK in CCCR register and selected by the Smart Card selection bit CLKSEL in the CCCR register. When CLKSEL is set to 1 to select the fCCLK clock as the Smart Card clock source, a software control bit, SMF, can determine whether the clock output on the CCLK pin, which comes from the fCRD clock, is moreover to be divided by 2 or not. If users wish to handle the CCLK clock manually, the CLKSEL bit should first be set to 0 and then the value of the CCLK bit will be present on the CCLK pin. When the Smart Card is first inserted, the data direction convention is sent first in the Answer-to Reset packet to inform the Smart Card interface whether the MSB of the data is sent first or the LSB is sent first. If the direction convention used by the Smart Card is the same as the convention used by the Smart Card interface, the UART interface will generate a reception interrupt if the reception interrupt is enabled without a parity error flag. Otherwise, the UART interface will generate a reception interrupt and the parity error flag will be asserted. By checking the parity error flag the Smart Card interface can know if the data direction convention is correct or not. Power Control When the Smart Card is first inserted and detected, the power-on sequence for the external Smart Card should be activated by the application programs to supply power to the external Smart Card. All the information necessary for the Smart Card interface to communicate with the external Card is contained in the Answer-to-Reset packet including the data transfer type (Character or Blocks), the data direction convention (MSB or LSB first), the clock rate information (ETU, GTC or WTC), etc. The voltage level supplied to the Smart Card is also defined in the Answer-to-Reset packet. The Smart Card power supply voltage level is generated by the LDO and selected by the Smart Card Power Supply voltage selection bits VC1 and VC0 in the CCR register. When the external Smart Card is inserted, the application program should set the CRDVCC pin to the expected voltage level defined in the Answer-to-Reset packet. Similarly, the power deactivation procedure defined in the ISO 7816-3 standard should also be properly arranged by the application programs when the external Smart Card is removed. After the external Smart Card is removed, the Smart Card Interface Circuitry enable control bit, CVCC, in the CCCR Register will be automatically cleared to zero to prevent the Smart Card Interface module from being re-modified.The CRDVCC pin voltage level and the related Smart Card interface register contents will remain unchanged but the relevant Smart Card Interface pins including CRST, CCLK, CIO, CC4 and CC8 pins will be kept at a low level when the external Card is removed. The Power Control circuitry provides the Card voltage and current indicators to avoid malfunctions. When the Card voltage is within its specified range, the Card Voltage flag VCOK will be set to 1. If the Card is not in the specified range, the VCOK flag will be cleared to 0 to indicate that the Card voltage is not within the specified range. As the VCOK bit changes from 1 to 0, the corresponding pending flag named VCP in CIPR register will be set to 1 if the Card Voltage error interrupt control VCE in the CIER register is enabled. Rev. 1.10 193 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU When the current consumed by the external Smart Card is within the range specified in the ISO 7816-3 standard, the Card Current Overload flag IOVF will remain at a “0” value. If the Card current is not within the specified range, the IOVF flag will be set to 1 to indicate that the Card Current overloads. As the IOVF bit is set to 1, the relevant pending flag, IOVFP, in the CIPR register will also be set to 1 if the Card Current Overload interrupt control enable bit, IOVFE, in the CIER register is enabled. Smart Card Interrupt Structure There are several conditions for the Smart Card that to generate a Smart Card interrupt. When these conditions exist, an interrupt pulse will be generated to get the attention of the microcontroller. These conditions are a Smart Card Insertion/Removal, a Smart Card Voltage error, a Smart Card Current Overload, a Waiting Time Counter Underflow, a Parity error, an end of a Character Transmission or Reception and an empty Transmit buffer. When a Smart Card interrupt is generated by any of these conditions, then if the corresponding interrupt enable control bit in the host MCU is enabled and the stack is not full, the program will jump to the corresponding interrupt vector where it can be serviced before returning to the main program. For Smart Card interrupt events, except for Card Insertion/Removal events, there are corresponding pending flags which can be masked by the corresponding interrupt enable control bits. When the related interrupt enable control is disabled, the corresponding interrupt pending flag will not be affected by the request flag and no interrupt will be generated. If the related interrupt enable control is enabled, the relevant interrupt pending flag will be affected by the request flag and then the interrupt will be generated. The pending flag register CIPR is read only and once the pending flag is read by the application program, it will be automatically cleared while the related request flag should be cleared by the application program manually. When a Smart Card Insertion/Removal event occurs, the Card Insertion/Removal request flag, CIRF, will be set or clear dependent upon the presence of a card, and a Smart Card Insertion/Removal interrupt will be directly generated without any associated Smart Card interrupt control being enabled. For a Smart Card interrupt occurred to be serviced, in addition to the bits for the corresponding interrupt enable control in the Smart Card interface being set, the global interrupt enable control and the related interrupt enable control bits in the host MCU must also be set. If these bits are not set, then no interrupt will be serviced. Rev. 1.10 194 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Card Presence Request flag CIRF Interrupt Signal to MCU 0 Transmit Buffer Empty Request flag TXBEF TXBEE End of Transmission Request flag TXCF TXCE End of Reception Request flag RXCF RXCE 0 End of Reception pending flag RXCP 1 0 PARE Parity Error pending flag PARP 1 0 WTC Underflow Request flag WTF 0 IOVFE Card Current Overload pending flag IOVFP 1 0 VCE Interrupt Signal to MCU WTC Underflow pending flag WTP 1 WTE Card Current Overload Request flag IOVF CSR Register End of Transmission pending flag TXCP 1 0 Parity Error Request flag PARF Card Voltage Status Request flag VCOK Transmit Buffer Empty pending flag TXBEP 1 Card Voltage Error pending flag VCP 1 CIER Register CIPR Register Smart Card Interrupt Structure Programming Considerations Since the whole Smart Card interface is driven by the clock fCRD which is derived from the high speed oscillator clock fH, the Smart Card interface will not operate, even interface registers read/ write operations, if the high speed oscillator clock fH is stopped. For example, if the MCU clock source is switched to the low speed clock fSUB which comes from the low speed oscillator LXT or LIRC, then all operations related to the Smart Card interface are not performed. Smart Card Interface Status and Control Registers There are several registers associated with the Smart Card function. Some of the registers control the overall function of the Smart Card interface as well as the interrupts, while some of the registers contain the status bits which indicate the Smart Card data transfer situations, error conditions and power supply conditions. Also there are two registers for the UART transmission and reception respectively to store the data received from or to be transmitted to the external Smart Card. Rev. 1.10 195 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit Register Name 7 6 5 4 3 2 1 0 CCR RSTCRD CDET VC1 VC0 UMOD WTEN CREP CONV CSR TXBEF CIRF IOVF VCOK WTF TXCF RXCF PARF CCCR CLKSEL — CC8 CC4 CIO CCLK CRST CVCC SMF SMCEN — RETRY45 RCIO RCDET CETU1 COMP — — — — ETU10 ETU9 ETU8 CETU0 ETU7 ETU6 ETU5 ETU4 ETU3 ETU2 ETU1 ETU0 CGT1 — — — — — — — GT8 CGT0 GT7 GT6 GT5 GT4 GT3 GT2 GT1 GT0 CWT2 WT23 WT22 WT21 WT20 WT19 WT18 WT17 WT16 CWT1 WT15 WT14 WT13 WT12 WT11 WT10 WT9 WT8 CWT0 WT7 WT6 WT5 WT4 WT3 WT2 WT1 WT0 CIER TXBEE — IOVFE VCE WTE TXCE RXCE PARE CIPR TXBEP — IOVFP VCP WTP TXCP RXCP PARP ISOC CRDCKS1 CRDCKS0 CTXB TB7 TB6 TB5 TB4 TB3 TB2 TB1 TB0 CRXB RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0 Smart Card Interface Registers List CCR Register Bit 7 6 5 4 3 2 1 0 Name RSTCRD CDET R/W R/W R/W VC1 VC0 UMOD WTEN CREP CONV R/W R/W R/W R/W R/W POR 0 0 0 R/W 0 0 0 0 0 Bit 7RSTCRD: Smart card interface UART reset 0: No Smart card UART reset 1: Smart card UART reset This bit is used to reset the smart card UART by setting this bit high. This bit is set and cleared by application program. Bit 6CDET: Card presence detector configuration 0: Connector switch open if no card is present 1: Connector switch short if no card is present This bit is set and cleared by application program to configure the switch type of the card presence detector. Bit 5~4VC1~VC0: Card voltage selection 00: 0V 01: 1.8V 10: 3V 11: 5V These bits are set and cleared by application program to select the card voltage supplied on the CRDVCC pin. Bit 3UMOD: UART mode selection 0: Manual mode – CIO is driven by application program via CIO bit 1: UART mdoe – CIO is controlled by the smart card UART module This bit is set and cleared by application program to select the smart card UART operating mode. Rev. 1.10 196 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 2WTEN: Waiting Time Counter (WTC) counting control 0: WTC stops counting 1: WTC starts to count This bit is set and cleared by application program to enable the WTC counting function. When the WTEN bit is cleared to 0, a write access to the CWT2 register will load the value held in the CWT2~CWT0 registers into the WTC. If it is set to 1, the WTC is enabled and automatically reloaded with the value in CWT2~CWT0 at each start bit occurrence. Bit 1CREP: Character repetition enable control at a parity error condition 0: No retry on parity error 1: Automatically retry on parity error The CREP bit is set and cleared by application program. When the CREP bit is cleared to 0, both the RXCF and PARF flags will be set on parity error in reception mode after the data is received while the PARF is set but the TXCF is cleared in the transmission mode. If the CREP bit is set to 1, the character retry will automatically be activated on parity error for 4 or 5 times depending upon the RETRY45 bit in the ISOC register. In the transmission mode the character will be re-transmitted if the transmitted data is refused and then the parity error flag PARF will be set at the end of the 4th or 5th transmission but the TXCF bit will not be set. In the reception mode if the received data has a parity error, the receiver will inform the transmitter for 4 or 5 times and then the PARF and RXCF flags will both be set at the end of the 4th or 5th reception. Bit 0CONV: Data direction convention 0: LSB is transferred first – State “High” encodes value “1” and LSB is transferred first 0: MSB is transferred first – State “Low” encodes value “1” and MSB is transferred first This bit is set and cleared by application program to select if the data is LSB transferred first or MSB transferred first. When the data direction is the same as the direction specified by the external Smart Card, the RXCF bit will be set to 1 without a parity error. Otherwise, both the RXCF and PARF bits will be set to 1 after the data is received. CSR Register Bit 7 6 5 4 3 2 1 0 Name TXBEF CIRF IOVF VCOK WTF TXCF RXCF PARF R/W R R R R R R/W R R/W POR 1 0 0 0 0 0 0 0 Bit 7TXBEF: Transmit buffer empty request flag 0: Transmit buffer is not empty 1: Transmit buffer is empty This bit is used to indicate whether the transmit buffer is empty or not and is set or cleared by hardware automatically. Bit 6CIRF: Card presence request flag 0: No card is present 1: A card is present This bit is used to indicate whether the card is present or not and is set or cleared by hardware automatically. The CIRF bit will synchronously trigger the SCIRF bit in the MCU interrupt controller. Bit 5IOVF: Card current overload request flag 0: Card current does not overload 1: Card current overloads This bit is used to indicate whether the card current overloads or not and is set or cleared by hardware automatically. Rev. 1.10 197 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 4VCOK: Card voltage status flag 0: Card voltage is not in the specified range 1: Card voltage is in the specified range This bit is used to indicate whether the card voltage is in the specified range or not and is set or cleared by hardware automatically. Bit 3WTF: Waiting Time Counter (WTC) underflow request flag 0: WTC does not underflow 1: WTC underflows This bit is used to indicate whether the WTC underflow or not. It is set by hardware and cleared by the application program in the specific procedure: clr WTEN, access CWT2 and set WTEN. Bit 2TXCF: Character transmission request flag 0: No character is transmitted 1: A character has been transmitted The TXCF bit is set by hardware and cleared by the application program. It is used to indicate whether the character has been transmitted or not. Bit 1RXCF: Character reception request flag 0: No character is received 1: A character has been received The RXCF bit is set by hardware automatically and cleared after a read access to the CRXB register by the application program. The RXCF bit will always be set to 1 when a character is received regardless of the parity check result. When the character has been received, the received data stored in the CRXB register should be moved to the data memory specified by users. If the contents of the CRXB register are not read before the end of the next character shifted in, the data stored in the CRXB register will be overwritten. Bit 0PARF: Parity error request flag 0: No parity error 1: Parity error has occurred CCCR Register Bit 7 6 5 4 3 2 1 0 Name CLKSEL — CC8 CC4 CIO CCLK CRST CVCC R/W R/W — R/W R/W R R/W R/W R/W POR 0 — x x x 0 x 0 “x”: unknown Bit 7CLKSEL: Smart card CCLK pin clock source selection 0: From the CCLK bit value 1: From fCCLK clock This bit is used to select which clock source is present on the external CCLK pin. It is set and cleared by application program. It is recommended that a certain value should be written into the CCLK bit to activate the clock at a known level before the CLKSEL bit is switched from 1 to 0. For detailed fCCLK selection, refer to the ISOC register. Bit 6 Unimplemented, read as “0” Bit 5CC8: CC8 pin control 0: The external CC8 pin status is 0 1: The external CC8 pin status is 1 This bit is set and cleared by the application program to control the external CC8 pin status. The value written into this bit will be present on the external CC8 pin. Reading this bit will return the status present on the CC8 pin. Rev. 1.10 198 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 4CC4: CC4 pin control 0: The external CC4 pin status is 0 1: The external CC4 pin status is 1 This bit is set and cleared by the application program to control the external CC4 pin status. The value written into this bit will be present on the external CC4 pin. Reading this bit will return the status present on the CC4 pin. Bit 3CIO: CIO pin control 0: The external CIO pin status is 0 1: The external CIO pin has an open drain condition This bit is only available if the UMOD bit in the CCR register is cleared to 0 to select the Manual mode. It is set and cleared by the application program to control the external CIO pin status in the Manual mode. Reading this bit will return the status present on the CIO pin. A pull high resistor can be connected to the CIO pin determined by the RCIO bit in the ISOC register. Bit 2CCLK: CCLK pin control 0: The external CCLK pin status is 0 1: The external CCLK pin status is 1 This bit is only available if the CLKSEL bit in the CCCR register is set to 0. It is set and cleared by the application program to control the external CCLK pin status when the CLKSEL bit is low. Reading this bit will return the current value in this bit instead of the status present on the CCLK pin. Bit 1CRST: CRST pin control 0: The status of the external CRST pin is 0 1: The status of the external CRST pin is 1 This bit is set and cleared by application program to control the external CRST pin status to be used to reset the external Smart Card. Reading this bit will return the present status of the CRST pin. Bit 0CVCC: Smart Card Interface Circuitry enable control 0: Smart card interface circuitry is disabled. 1: Smart card interface circuitry is enabled. This bit is set and cleared by application program to control the Smart card interface module is switched on or off when the external Card is present. If the external Card is not present on the CDET pin, this bit is not available to control the Smart card interface circuitry and will automatically be cleared to 0 by hardware. Rev. 1.10 199 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU ISOC Register Bit Name 7 6 CRDCKS1 CRDCKS0 5 4 3 2 1 0 SMF SMCEN — RETRY45 RCIO RCDET R/W R/W R/W R/W R/W — R/W R/W R/W POR 0 0 0 0 — 0 0 0 Bit 7~6CRDCKS1~CRDCKS0: Smart card interface clock source fCRD divided ratio selection 00: fCRD = fH /2 01: fCRD = fH /3 10: fCRD = fH /1 11: fCRD = fH /4 Bit 5SMF: Smart card interface clock frequency fCCLK selection 0: fCCLK = fCRD 1: fCCLK = fCRD /2 Bit 4SMCEN: Smart card interface clock enable control 0: fCCLK is disabled 1: fCCLK is enabled This bit is used to control the Smart Card interface clock. If this bit is cleared to disable the clock, the relevant registers in the Smart Card interface module can not be accessed. When the Smart Card interface clock is disabled, it has no effect on the Card insertion or removal detections. Bit 3 Unimplemented, read as “0” Bit 2RETRY45: Card interface character transfer repetition times selection 0: 4 times 1: 5 times Bit 1RCIO: Card interface CIO pin pull high function enable control 0: Disable 1: Enable Bit 0RCDET: Card interface CDET pin pull high function enable control 0: Disable 1: Enable Rev. 1.10 200 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU CETU Registers The CETU registers, CETU1 and CETU0, contains the specific value determined by the formula described in the ETU section. It also includes a control bit of the Compensation function for the ETU time granularity. Note that the value of the ETU must be in the range of 001H to 7FFH. To obtain the maximum ETU decimal value of 2048, a “000H” value should be written into the ETU10 ~ ETU0 bits. • CETU1 Register Bit 7 6 5 4 3 2 1 0 Name COMP — — — — ETU10 ETU9 ETU8 R/W R/W — — — — R/W R/W R/W POR 0 — — — — 0 0 1 Bit 7COMP: Compensation function enable control 0: Disable 1: Enable This bit is set and cleared by application program used to control the compensation function. The compensation function has been described and more details can be obtained in the ETU section. Bit 6~3 Unimplemented, read as “0” Bit 2~0ETU10~ETU8: ETU bit 10 ~ bit 8 values The bits are set and cleared by application program to modify the ETU values. Writing to the CETU1 register will reload the updated value into the ETU counter. • CETU0 Register Bit 7 6 5 4 3 2 1 0 Name ETU7 ETU6 ETU5 ETU4 ETU3 ETU2 ETU1 ETU0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 1 1 1 0 1 0 0 Bit 7~0ETU7~ETU0: ETU bit 7 ~ bit 0 values The bits are set and cleared by application program to modify the ETU values. Rev. 1.10 201 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU CGT Registers The CGT registers, CGT1 and CGT0, store the specific GTC value obtained from the Answer-toReset packet described in the GTC section. The GT8~GT0 bits are set and cleared by application program to modify the GTC values. The updated GTC value will be loaded into the GTC counter at the end of the current guard time period. Note that the GTC value must be in the range of 00CH to 1FFH. • CGT1 Register Bit 7 6 5 4 3 2 1 0 Name — — — — — — — GT8 R/W — — — — — — — R/W POR — — — — — — — 0 Bit 7~1 Unimplemented, read as “0” Bit 0GT8: GTC value bit 8 • CGT0 Register Bit 7 6 5 4 3 2 1 0 Name GT7 GT6 GT5 GT4 GT3 GT2 GT1 GT0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 1 1 0 0 Bit 7~0GT7~GT0: GTC value bit 7 ~ bit 0 CWT Registers The CWT registers, CWT2~CWT0, store the specific WTC value obtained from the Answer-toReset packet described in the WTC section. The WT23~WT0 bits are set and cleared by application program to modify the WTC values. The reload conditions of the updated WTC values are described in the WTC section. Note that the WTC value must be in the range of 0x00-2580H to 0xFF-FFFFH. Refer to the WTC section for more details. • CWT2 Register Bit 7 6 5 4 3 2 1 0 Name WT23 WT22 WT21 WT20 WT19 WT18 WT17 WT16 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0WT23~WT16: WTC value bit 23 ~ bit 16 • CWT1 Register Bit 7 6 5 4 3 2 1 0 Name WT15 WT14 WT13 WT12 WT11 WT10 WT9 WT8 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0WT15~WT8: WTC value bit 15 ~ bit 8 Rev. 1.10 202 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU • CWT0 Register Bit 7 6 5 4 3 2 1 0 Name WT7 WT6 WT5 WT4 WT3 WT2 WT1 WT0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0WT7~WT0: WTC value bit 7 ~ bit 0 CIER Register Bit 7 6 5 4 3 2 1 0 Name R/W TXBEE — IOVFE VCE WTE TXCE RXCE PARE R/W — R/W R/W R/W R/W R/W POR R/W 0 — 0 0 0 0 0 0 Bit 7TXBEE: Transmit buffer empty interrupt control 0: Disable 1: Enable This bit is set and cleared by application program used to control the transmit buffer empty interrupt. If this bit is set to 1, the transmit buffer empty interrupt will be generated when the transmit buffer is empty. Bit 6 Unimplemented, read as “0” Bit 5IOVFE: Card current overload interrupt control 0: Disable 1: Enable This bit is set and cleared by application program and is used to control the card current overload interrupt. If this bit is set to 1, the card current overload interrupt will be generated when the card current overloads. Bit 4VCE: Card voltage error interrupt control 0: Disable 1: Enable This bit is set and cleared by application program and is used to control the card voltage error interrupt. If this bit is set to 1, the card voltage error interrupt will be generated when the card voltage is not in the specified ramge. Bit 3WTE: Waiting time counter underflow interrupt control 0: Disable 1: Enable This bit is set and cleared by application program and is used to control the waiting time counter underflow interrupt. If this bit is set to 1, the waiting time counter underflow interrupt will be generated when the waiting time counter underflows. Bit 2TXCE: Character transmission completion interrupt control 0: Disable 1: Enable This bit is set and cleared by application program and is used to control the character transmission completion interrupt. If this bit is set to 1, the character transmission completion interrupt will be generated at the end of the character transmission. Bit 1RXCE: Character reception completion interrupt control 0: Disable 1: Enable This bit is set and cleared by application program and is used to control the character reception completion interrupt. If this bit is set to 1, the character reception completion interrupt will be generated at the end of the character reception. Rev. 1.10 203 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 0PARE: Parity error interrupt control 0: Disable 1: Enable This bit is set and cleared by application program and is used to control the parity error interrupt. If this bit is set to 1, the parity error interrupt will be generated when a parity error occurs. CIPR Register Bit 7 6 5 4 3 2 1 0 Name TXBEP — IOVFP VCP WTP TXCP RXCP PARP R/W R/W — R/W R/W R/W R/W R/W R/W POR 0 — 0 0 0 0 0 0 Bit 7TXBEP: Transmit buffer empty interrupt pending flag 0: No interrupt pending 1: Interrupt pending This bit is set by hardware and cleared by a read access to this register using the application program. It is used to indicate whether there is a transmit buffer empty interrupt pending or not. If the corresponding interrupt enable control bit is set to 1 and the transmit buffer is empty, this bit will be set to 1 to indicate that the transmit buffer empty interrupt is pending. Bit 6 Unimplemented, read as “0” Bit 5IOVFP: Card current overload interrupt pending flag 0: No interrupt pending 1: Interrupt pending This bit is set by hardware and cleared by a read access to this register using the application program. It is used to indicate whether there is a card current overload interrupt pending or not. If the corresponding interrupt enable control bit is set to 1 and the card current overloads, this bit will be set to 1 to indicate that the card current overload interrupt is pending. Bit 4VCP: Card voltage error interrupt pending flag 0: No interrupt pending 1: Interrupt pending This bit is set by hardware and cleared by a read access to this register using the application program. It is used to indicate whether there is a card voltage error interrupt pending or not. If the corresponding interrupt enable control bit is set to 1 and the card voltage is not in the speficied range, this bit will be set to 1 to indicate that the card voltage error interrupt is pending. Bit 3WTP: Waiting time counter underflow interrupt pending flag 0: No interrupt pending 1: Interrupt pending This bit is set by hardware and cleared by a read access to this register using the application program. It is used to indicate whether there is a waiting time counter underflow interrupt pending or not. If the corresponding interrupt enable control bit is set to 1 and the waiting time counter undeflows, this bit will be set to 1 to indicate that the waiting time counter underflow interrupt is pending. Bit 2TXCP: Character transmission completion interrupt pending flag 0: No interrupt pending 1: Interrupt pending This bit is set by hardware and cleared by a read access to this register using the application program. It is used to indicate whether there is a character transmission completion interrupt pending or not. If the corresponding interrupt enable control bit is set to 1 and a character has been transmitted, this bit will be set to 1 to indicate that the character transmission completion interrupt is pending. Rev. 1.10 204 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit 1RXCP: Character reception completion interrupt pending flag 0: No interrupt pending 1: Interrupt pending This bit is set by hardware and cleared by a read access to this register using the application program. It is used to indicate whether there is a character reception completion interrupt pending or not. If the corresponding interrupt enable control bit is set to 1 and a character has been received, this bit will be set to 1 to indicate that the character reception completion interrupt is pending. Bit 0PARP: Parity error interrupt pending flag 0: No interrupt pending 1: Interrupt pending This bit is set by hardware and cleared by a read access to this register using the application program. It is used to indicate whether there is a parito error interrupt pending or not. If the corresponding interrupt enable control bit is set to 1 and the parity error occurs, this bit will be set to 1 to indicate that the parito error interrupt is pending. CTXB Register Bit 7 6 5 4 3 2 1 0 Name TB7 TB6 TB5 TB4 TB3 TB2 TB1 TB0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0TB7~TB0: Transmit buffer bit 7 ~ bit 0 The CTXB register is used to store the data to be transmitted. CRXB Register Bit 7 6 5 4 3 2 1 0 Name RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7~0RB7~RB0: Receive buffer bit 7 ~ bit 0 The CRXB register is used to store the received data. As the character has been received completely, the value in the CRXB register should be read to avoid the next character being overwritten. Rev. 1.10 205 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Low Voltage Detector – LVD Each device has a Low Voltage Detector function, also known as LVD. This enabled the device to monitor the power supply voltage, VDD, and provide a warning signal should it fall below a certain level. This function may be especially useful in battery applications where the supply voltage will gradually reduce as the battery ages, as it allows an early warning battery low signal to be generated. The Low Voltage Detector also has the capability of generating an interrupt signal. LVD Register The Low Voltage Detector function is controlled using a single register with the name LVDC. Three bits in this register, VLVD2~VLVD0, are used to select one of eight fixed voltages below which a low voltage condition will be determined. A low voltage condition is indicated when the LVDO bit is set. If the LVDO bit is low, this indicates that the VDD voltage is above the preset low voltage value. The LVDEN bit is used to control the overall on/off function of the low voltage detector. Setting the bit high will enable the low voltage detector. Clearing the bit to zero will switch off the internal low voltage detector circuits. As the low voltage detector will consume a certain amount of power, it may be desirable to switch off the circuit when not in use, an important consideration in power sensitive battery powered applications. LVDC Register Bit 7 6 5 4 3 2 1 0 Name — — LVDO LVDEN VBGEN VLVD2 VLVD1 VLVD0 R/W — — R R/W R/W R/W R/W R/W POR — — 0 0 0 0 0 0 Bit 7~6 Unimplemented, read as “0” Bit 5LVDO: LVD output flag 0: No Low Voltage Detected 1: Low Voltage Detected Bit 4LVDEN: Low Voltage Detector Enable control 0: Disable 1: Enable Bit 3VBGEN: Bandgap Voltage Output Enable control 0: Disable 1: Enable Bit 2~0VLVD2~VLVD0: LVD Voltage selection 000: 2.0V 001: 2.2V 010: 2.4V 011: 2.7V 100: 3.0V 101: 3.3V 110: 3.6V 111: 4.0V Rev. 1.10 206 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU LVD Operation The Low Voltage Detector function operates by comparing the power supply voltage, VDD, with a pre-specified voltage level stored in the LVDC register. This has a range of between 2.0V and 4.0V. When the power supply voltage, VDD, falls below this pre-determined value, the LVDO bit will be set high indicating a low power supply voltage condition. The Low Voltage Detector function is supplied by a reference voltage which will be automatically enabled. When the device is powered down the low voltage detector will remain active if the LVDEN bit is high. After enabling the Low Voltage Detector, a time delay tLVDS should be allowed for the circuitry to stabilise before reading the LVDO bit. Note also that as the VDD voltage may rise and fall rather slowly, at the voltage nears that of VLVD, there may be multiple bit LVDO transitions. LVD Operation The Low Voltage Detector also has its own interrupt which is contained within one of the Multifunction interrupts, providing an alternative means of low voltage detection, in addition to polling the LVDO bit. The interrupt will only be generated after a delay of tLVD after the LVDO bit has been set high by a low voltage condition. When the device is powered down the Low Voltage Detector will remain active if the LVDEN bit is high. In this case, the LVF interrupt request flag will be set, causing an interrupt to be generated if VDD falls below the preset LVD voltage. This will cause the device to wake-up from the SLEEP or IDLE Mode, however if the Low Voltage Detector wake up function is not required then the LVF flag should be first set high before the device enters the SLEEP or IDLE Mode. Rev. 1.10 207 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Interrupts Interrupts are an important part of any microcontroller system. When an external event or an internal function such as a Timer Module or an A/D converter requires microcontroller attention, their corresponding interrupt will enforce a temporary suspension of the main program allowing the microcontroller to direct attention to their respective needs. These devices contain several external interrupt and internal interrupts functions. The external interrupts are generated by the action of the external INT0 and INT1 pins, while the internal interrupts are generated by various internal functions such as the TMs, Time Base, LVD, comparators, SPI, I2C, UART, Smart Card interface, USB interface and the A/D converter, etc. Interrupt Registers Overall interrupt control, which basically means the setting of request flags when certain microcontroller conditions occur and the setting of interrupt enable bits by the application program, is controlled by a series of registers, located in the Special Purpose Data Memory, as shown in the accompanying table. The number of registers depends upon the device chosen but fall into three categories. The first is the INTC0~INTC3 registers which setup the primary interrupts, the second is the MFI0~MFI3 registers which setup the Multi-function interrupts. Finally there is an INTEG register to setup the external interrupt trigger edge type. Each register contains a number of enable bits to enable or disable individual interrupts as well as interrupt flags to indicate the presence of an interrupt request. The naming convention of these follows a specific pattern. First is listed an abbreviated interrupt type, then the (optional) number of that interrupt followed by either an “E” for enable/disable bit or “F” for request flag. Function Global Smart Card operation Enable Bit Request Flag EMI — Notes — CRDE CRDF — USB USBE USBF — INTn Pins INTnE INTnF n=0~1 UART URnE URnF n=0~1 Smart Card Insertion/Removal CRDE CRDF — Multi-function MFnE MFnF n=0~3 Time Base TBnE TBnF n=0~1 SPI SPInE SPInF n=0~1 I2C IICE IICF — LVD LVE LVF — CPnE CPnF n=0~1 — Comparator A/D Converter CTM PTM STM ADE ADF CTMnPE CTMnPF CTMnAE CTMnAF PTMPE PTMPF PTMAE PTMAF STMPE STMPF STMAE STMAF n=0~1 — — Interrupt Register Bit Naming Conventions Rev. 1.10 208 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Bit Register Name 7 6 5 4 3 2 1 0 INT0S0 INTEG — — — — INT1S1 INT1S0 INT0S1 INTC0 — INT0F USBF CRDF INT0E USBE CRDE EMI INTC1 SCIRF UR1F UR0F INT1F CIRE UR1E UR0E INT1E INTC2 TB1F TB0F MF1F MF0F TB1E TB0E MF1E MF0E INTC3 MF3F MF2F SPI1F SPI0F MF3E MF2E SPI1E SPI0E MFI0 MFI1 CTM1AF CTM1PF CTM0AF CTM0PF CTM1AE CTM1PE CTM0AE CTM0PE STMAF STMPF PTMAF PTMPF STMAE STMPE PTMAE PTMPE MFI2 — — LVF IICF — — LVE IICE MFI3 — ADF CP1F CP0F — ADE CP1E CP0E Interrupt Registers List INTEG Register Bit 7 6 5 4 3 2 1 0 Name — — — — INT1S1 INT1S0 INT0S1 INT0S0 R/W — — — — R/W R/W R/W R/W POR — — — — 0 0 0 0 Bit 7~4 Unimplemented, read as “0” Bit 3~2INT1S1~INT1S0: Interrupt edge control for INT1 pin 00: Disable 01: Rising edge 10: Falling edge 11: Rising and falling edges Bit 1~0INT0S1~INT0S0: Interrupt edge control for INT0 pin 00: Disable 01: Rising edge 10: Falling edge 11: Rising and falling edges Rev. 1.10 209 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU INTC0 Register Bit 7 6 5 4 3 2 1 0 Name — INT0F USBF CRDF INT0E USBE CRDE EMI R/W — R/W R/W R/W R/W R/W R/W R/W POR — 0 0 0 0 0 0 0 Bit 7 Unimplemented, read as “0” Bit 6INT0F: INT0 interrupt request flag 0: No request 1: Interrupt request Bit 5USBF: USB interrupt request flag 0: No request 1: Interrupt request Bit 4CRDF: Smart Card operation interrupt request flag 0: No request 1: Interrupt request Bit 3INT0E: INT0 interrupt control 0: Disable 1: Enable Bit 2USBE: USB interrupt control 0: Disable 1: Enable Bit 1CRDE: Smart Card operation interrupt control 0: Disable 1: Enable Bit 0EMI: Global interrupt control 0: Disable 1: Enable Rev. 1.10 210 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU INTC1 Register Bit 7 6 5 4 3 2 1 0 Name SCIRF UR1F UR0F INT1F CIRE UR1E UR0E INT1E R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7SCIRF: Smart card insertion/removal interrupt request flag 0: No request 1: Interrupt request Bit 6UR1F: UART1 transfer interrupt request flag 0: No request 1: Interrupt request Bit 5UR0F: UART0 transfer interrupt request flag 0: No request 1: Interrupt request Bit 4INT1F: INT1 interrupt request flag 0: No request 1: Interrupt request Bit 3CIRE: Smart card insertion/removal interrupt control 0: Disable 1: Enable Bit 2UR1E: UART1 transfer interrupt control 0: Disable 1: Enable Bit 1UR0E: UART0 transfer interrupt control 0: Disable 1: Enable Bit 0INT1E: INT1 interrupt control 0: Disable 1: Enable Rev. 1.10 211 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU INTC2 Register Bit 7 6 5 4 3 2 1 0 Name TB1F TB0F MF1F MF0F TB1E TB0E MF1E MF0E R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7TB1F: Time Base 1 interrupt request flag 0: No request 1: Interrupt request Bit 6TB0F: Time Base 0 interrupt request flag 0: No request 1: Interrupt request Bit 5MF1F: Multi-function 1 interrupt request flag 0: No request 1: Interrupt request Bit 4MF0F: Multi-function 0 interrupt request flag 0: No request 1: Interrupt request Bit 3TB1E: Time Base 1 interrupt control 0: Disable 1: Enable Bit 2TB0E: Time Base 0 interrupt control 0: Disable 1: Enable Bit 1MF1E: Multi-function 1 interrupt control 0: Disable 1: Enable Bit 0MF0E: Multi-function 0 interrupt control 0: Disable 1: Enable Rev. 1.10 212 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU INTC3 Register Bit 7 6 5 4 3 2 1 0 Name MF3F MF2F SPI1F SPI0F MF3E MF2E SPI1E SPI0E R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7MF3F: Multi-function 3 interrupt request flag 0: No request 1: Interrupt request Bit 6MF2F: Multi-function 2 interrupt request flag 0: No request 1: Interrupt request Bit 5SPI1F: SPI1 interrupt request flag 0: No request 1: Interrupt request Bit 4SPI0F: SPI0 interrupt request flag 0: No request 1: Interrupt request Bit 3MF3E: Multi-function 3 interrupt control 0: Disable 1: Enable Bit 2MF2E: Multi-function 2 interrupt control 0: Disable 1: Enable Bit 1SPI1E: SPI1 interrupt control 0: Disable 1: Enable Bit 0SPI0E: SPI0 interrupt control 0: Disable 1: Enable Rev. 1.10 213 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU MFI0 Register Bit 7 6 5 Name CTM1AF CTM1PF CTM0AF 4 3 2 1 0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 CTM0PF CTM1AE CTM1PE CTM0AE CTM0PE Bit 7CTM1AF: CTM1 Comparator A match Interrupt request flag 0: No request 1: Interrupt request Bit 6CTM1PF: CTM1 Comparator P match Interrupt request flag 0: No request 1: Interrupt request Bit 5CTM0AF: CTM0 Comparator A match Interrupt request flag 0: No request 1: Interrupt request Bit 4CTM0PF: CTM0 Comparator P match Interrupt request flag 0: No request 1: Interrupt request Bit 3CTM1AE: CTM1 Comparator A match Interrupt control 0: Disable 1: Enable Bit 2CTM1PE: CTM1 Comparator P match Interrupt control 0: Disable 1: Enable Bit 1CTM0AE: CTM0 Comparator A match Interrupt control 0: Disable 1: Enable Bit 0CTM0PE: CTM0 Comparator P match Interrupt control 0: Disable 1: Enable Rev. 1.10 214 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU MFI1 Register Bit 7 6 5 4 3 2 1 0 Name STMAF STMPF PTMAF PTMPF STMAE STMPE PTMAE PTMPE R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit 7STMAF: STM Comparator A match Interrupt request flag 0: No request 1: Interrupt request Bit 6STMPF: STM Comparator P match Interrupt request flag 0: No request 1: Interrupt request Bit 5PTMAF: PTM Comparator A match Interrupt request flag 0: No request 1: Interrupt request Bit 4PTMPF: PTM Comparator P match Interrupt request flag 0: No request 1: Interrupt request Bit 3STMAE: STM Comparator A match Interrupt control 0: Disable 1: Enable Bit 2STMPE: STM Comparator P match Interrupt control 0: Disable 1: Enable Bit 1PTMAE: PTM Comparator A match Interrupt control 0: Disable 1: Enable Bit 0PTMPE: PTM Comparator P match Interrupt control 0: Disable 1: Enable MFI2 Register Bit 7 6 5 4 3 2 1 0 Name — — LVF IICF — — LVE IICE R/W — — R/W R/W — — R/W R/W POR — — 0 0 — — 0 0 Bit 7~6 Unimplemented, read as “0” Bit 5LVF: LVD Interrupt request flag 0: No request 1: Interrupt request Bit 4IICF: I2C Interrupt request flag 0: No request 1: Interrupt request Bit 3~2 Unimplemented, read as “0” Bit 1LVE: LVD Interrupt control 0: Disable 1: Enable Bit 0IICE: I2C Interrupt control 0: Disable 1: Enable Rev. 1.10 215 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU MFI3 Register Bit 7 6 5 4 3 2 1 0 Name — ADF CP1F CP0F — ADE CP1E CP0E R/W — R/W R/W R/W — R/W R/W R/W POR — 0 0 0 — 0 0 0 Bit 7 Unimplemented, read as “0” Bit 6ADF: A/D Converter interrupt request flag 0: No request 1: Interrupt request Bit 5CP1F: Comparator 1 Interrupt request flag 0: No request 1: Interrupt request Bit 4CP0F: Comparator 0 Interrupt request flag 0: No request 1: Interrupt request Bit 3 Unimplemented, read as “0” Bit 2ADE: A/D Converter interrupt control 0: Disable 1: Enable Bit 1CP1E: Comparator 1 Interrupt control 0: Disable 1: Enable Bit 0CP0E: Comparator 0 Interrupt control 0: Disable 1: Enable Interrupt Operation When the conditions for an interrupt event occur, such as a TM Comparator P or Comparator A or A/ D conversion completion, etc, the relevant interrupt request flag will be set. Whether the request flag actually generates a program jump to the relevant interrupt vector is determined by the condition of the interrupt enable bit. If the enable bit is set high then the program will jump to its relevant vector; if the enable bit is zero then although the interrupt request flag is set an actual interrupt will not be generated and the program will not jump to the relevant interrupt vector. The global interrupt enable bit, if cleared to zero, will disable all interrupts. When an interrupt is generated, the Program Counter, which stores the address of the next instruction to be executed, will be transferred onto the stack. The Program Counter will then be loaded with a new address which will be the value of the corresponding interrupt vector. The microcontroller will then fetch its next instruction from this interrupt vector. The instruction at this vector will usually be a JMP which will jump to another section of program which is known as the interrupt service routine. Here is located the code to control the appropriate interrupt. The interrupt service routine must be terminated with a RETI, which retrieves the original Program Counter address from the stack and allows the microcontroller to continue with normal execution at the point where the interrupt occurred. Rev. 1.10 216 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU The various interrupt enable bits, together with their associated request flags, are shown in the accompanying diagrams with their order of priority. Some interrupt sources have their own individual vector while others share the same multi-function interrupt vector. Once an interrupt subroutine is serviced, all other interrupts will be blocked, as the global interrupt enable bit, EMI bit will be cleared automatically. This will prevent any further interrupt nesting from occurring. However, if other interrupt requests occur during this interval, although the interrupt will not be immediately serviced, the request flag will still be recorded. If an interrupt requires immediate servicing while the program is already in another interrupt service routine, the EMI bit should be set after entering the routine to allow interrupt nesting. If the stack is full, the interrupt request will not be acknowledged, even if the related interrupt is enabled, until the Stack Pointer is decremented. If immediate service is desired, the stack must be prevented from becoming full. In case of simultaneous requests, the accompanying diagram shows the priority that is applied. All of the interrupt request flags when set will wake-up the device if it is in SLEEP or IDLE Mode, however to prevent a wake-up from occurring the corresponding flag should be set before the device is in SLEEP or IDLE Mode. xxF Legend Req�est Fla�� no a�to reset in ISR Req�est Fla�� a�to reset in ISR xxE Enable Bits xxF Interr�pts contained within M�lti-F�nction Interr�pts EMI a�to disabled in ISR Interr�pt Name Req�est Fla�s Enable Bits Master Enable Vector Priority Smart Card CRDF CRDE EMI 04H Hi�h USB USBF USBE EMI 08H INT0 Pin INT0F INT0E EMI 0CH INT1 Pin INT1F INT1E EMI 10H U�RT 0 UR0F UR0E EMI 14H CTM0 P CTM0PF CTM0PE U�RT 1 UR1F UR1E EMI 18H CTM0 � CTM0�F CTM0�E CTM1 P CTM1PF CTM1PE Smart Card Inser./Remv SCIRF CIRE EMI 1CH CTM1 � CTM1�F CTM1�E M. F�nct. 0 MF0F MF0E EMI �0H STM P STMPF STMPE M. F�nct. 1 MF1F MF1E EMI �4H STM � STM�F STM�E PTM P PTMPF PTMPE Time Base 0 TB0F TB0E EMI �8H PTM � PTM�F PTM�E Time Base 1 TB1F TB1E EMI �CH SPI 0 SPI0F SPI0E EMI 30H SPI 1 SPI1F SPI1E EMI 34H M. F�nct. � MF�F MF�E EMI 38H M. F�nct. 3 MF3F MF3E EMI 3CH IIC IICF IICE LVD LVF LVE CMP 0 CP0F CP0E CMP 1 CP1F CP1E �/D �DF �DE Low Interrupt Scheme Rev. 1.10 217 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Smart Card Operation Interrupt For a Smart Card Interrupt to be generated, the global interrupt enable bit EMI must first be set as well as one of the associated Smart Card event Interrupt enable bits. The Smart Card events that will generate an interrupt include situations such as a Card voltage error, a Card current overload, a waiting timer overflow, a parity error, a transmit buffer empty or an end of transmission or reception. Once one of the associated Smart Card event interrupt enable control bits is set, it will automatically set the CRDE bit to 1 to enable the related Smart Card interrupt. An actual Smart Card Interrupt will take place when the Smart Card Interrupt request flag, CRDF, is set, a situation that will occur when a Smart Card event has occurred. When the interrupt is enabled, the stack is not full and a Smart Card event has occurred, a subroutine call to the Smart Card interrupt vector will take place. When the Smart Card Interrupt is serviced, the Smart Card interrupt request flag CRDF will be automatically reset and the EMI bit will be automatically cleared to disable other interrupts. USB Interrupt A USB interrupt request will take place when the USB interrupt request flags, USBF, is set, a situation that will occur when an endpoint is accessed. To allow the program to branch to its respective interrupt vector address, the global interrupt enable bit, EMI, and USB interrupt enable bit, USBE, must first be set. When the interrupt is enabled, the stack is not full and an endpoint is accessed, a subroutine call to the USB interrupt vector will take place. When the interrupt is serviced, the USB interrupt request flag, USBF, will be automatically reset and the EMI bit will be automatically cleared to disable other interrupts. External Interrupt The external interrupts are controlled by signal transitions on the pins INT0~INT1. An external interrupt request will take place when the external interrupt request flags, INT0F~INT1F, are set, which will occur when a transition, whose type is chosen by the edge select bits, appears on the external interrupt pins. To allow the program to branch to its respective interrupt vector address, the global interrupt enable bit, EMI, and respective external interrupt enable bit, INT0E~INT1E, must first be set. Additionally the correct interrupt edge type must be selected using the INTEG register to enable the external interrupt function and to choose the trigger edge type. As the external interrupt pins are pin-shared with I/O pins, they can only be configured as external interrupt pins if their external interrupt enable bit in the corresponding interrupt register has been set and the external interrupt pin is selected by the corresponding pin-shared function selection bits. The pin must also be setup as an input by setting the corresponding bit in the port control register. When the interrupt is enabled, the stack is not full and the correct transition type appears on the external interrupt pin, a subroutine call to the external interrupt vector will take place. When the interrupt is serviced, the external interrupt request flags, INT0F~INT1F, will be automatically reset and the EMI bit will be automatically cleared to disable other interrupts. Note that any pull-high resistor selections on the external interrupt pins will remain valid even if the pin is used as an external interrupt input. The INTEG register is used to select the type of active edge that will trigger the external interrupt. A choice of either rising or falling or both edge types can be chosen to trigger an external interrupt. Note that the INTEG register can also be used to disable the external interrupt function. Rev. 1.10 218 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU UART Transfer Interrupt The UARTn Transfer Interrupt is controlled by several UARTn transfer conditions. When one of these conditions occurs, an interrupt pulse will be generated to get the attention of the microcontroller. These conditions are a transmitter data register empty, transmitter idle, receiver data available, receiver overrun, address detect and an RXn pin wake-up. To allow the program to branch to its respective interrupt vector address, the global interrupt enable bit, EMI, and UARTn Interrupt enable bit, URnE, must first be set. When the interrupt is enabled, the stack is not full and any of the conditions described above occurs, a subroutine call to the UARTn Interrupt vector will take place. When the interrupt is serviced, the UARTn Interrupt flag, URnF, will be automatically cleared. The EMI bit will also be automatically cleared to disable other interrupts. Smart Card Insertion/Removal Interrupt For a Smart Card Insertion/Removal Interrupt to be generated, the global interrupt enable bit EMI and the Smart Card Insertion/Removal interrupt enable bit CIRE must first be set. An actual Smart Card Insertion/Removal Interrupt will take place when the Smart Card Insertion/Removal Interrupt request flag, SCIRF, is set, a situation that will occur when the Smart Card has been inserted or removed. When the interrupt is enabled, the stack is not full and the Smart Card has been inserted or removed, a subroutine call to the Smart Card Insertion/Removal Interrupt vector will take place. When the Smart Card Insertion/Removal Interrupt is serviced, the Smart Card Insertion/Removal interrupt request flag SCIRF will be automatically reset and the EMI bit will be automatically cleared to disable other interrupts. Time Base Interrupt The function of the Time Base Interrupt is to provide regular time signal in the form of an internal interrupt. It is controlled by the overflow signal from its internal timer. When this happens its interrupt request flag, TBnF, will be set. To allow the program to branch to its respective interrupt vector addresses, the global interrupt enable bit, EMI and Time Base enable bit, TBnE, must first be set. When the interrupt is enabled, the stack is not full and the Time Base overflows, a subroutine call to its respective vector location will take place. When the interrupt is serviced, the interrupt request flag, TBnF, will be automatically reset and the EMI bit will be cleared to disable other interrupts. The purpose of the Time Base Interrupt is to provide an interrupt signal at fixed time periods. Its clock source, fPSC, originates from the internal clock source fSYS, fSYS/4 or fSUB and then passes through a divider, the division ratio of which is selected by programming the appropriate bits in the TB0C and TB1C registers to obtain longer interrupt periods whose value ranges. The clock source which in turn controls the Time Base interrupt period is selected using the CLKS01 and CLKS00 bits in the PSCR register respectively. TB0[2:0] TB0ON fPSC/28 ~ fPSC/215 fSYS fSYS/4 fSUB M U X fPSC M U X Time Base 0 Interrupt M U X Time Base 1 Interrupt Prescaler fPSC/28 ~ fPSC/215 CLKS0[1:0] TB1ON TB1[2:0] Time Base Interrupts Rev. 1.10 219 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU PSCR Register Bit 7 6 5 4 3 2 1 0 Name — — — — — — CLKS01 CLKS00 R/W — — — — — — R/W R/W POR — — — — — — 0 0 Bit 7~2 Unimplemented, read as “0” Bit 1~0CLKS01~CLKS00: Prescaler clock source selection 00: fSYS 01: fSYS/4 1x: fSUB TB0C Register Bit 7 6 5 4 3 2 1 0 Name TB0ON — — — — TB02 TB01 TB00 R/W R/W — — — — R/W R/W R/W POR 0 — — — — 0 0 0 Bit 7TB0ON: Time Base 0 Enable Control 0: Disable 1: Enable Bit 6~3 Unimplemented, read as “0” Bit 2~0TB02~TB00: Time Base 0 time-out period selection 000: 28/fPSC 001: 29/fPSC 010: 210/fPSC 011: 211/fPSC 100: 212/fPSC 101: 213/fPSC 110: 214/fPSC 111: 215/fPSC TB1C Register Bit 7 6 5 4 3 2 1 0 Name TB1ON — — — — TB12 TB11 TB10 R/W R/W — — — — R/W R/W R/W POR 0 — — — — 0 0 0 Bit 7TB1ON: Time Base 1 Enable Control 0: Disable 1: Enable Bit 6~3 Unimplemented, read as “0” Bit 2~0TB12~TB10: Time Base 1 time-out period selection 000: 28/fPSC 001: 29/fPSC 010: 210/fPSC 011: 211/fPSC 100: 212/fPSC 101: 213/fPSC 110: 214/fPSC 111: 215/fPSC Rev. 1.10 220 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU SPI Interrupt The Serial Peripheral Interface Interrupt, also known as the SPIn interrupt, will take place when the SPIn Interrupt request flag, SPInF, is set, which occurs when a byte of data has been received or transmitted by the SPIn interface or an SPI incomplete transfer occurrence. To allow the program to branch to its respective interrupt vector address, the global interrupt enable bit, EMI, the SPIn Interrupt enable bit, SPInE, must first be set. When the interrupt is enabled, the stack is not full and any of the above described situations occurs, a subroutine call to the respective Interrupt vector will take place. When the SPIn Interrupt is serviced, the EMI bit will be automatically cleared to disable other interrupts together with the SPInF bit. Multi-function Interrupt Within the device there are up to four Multi-function interrupts. Unlike the other independent interrupts, these interrupts have no independent source, but rather are formed from other existing interrupt sources, namely the TM interrupts, I2C interface interrupts, LVD interrupt, comparator interrupt and A/D converter interrupt. A Multi-function interrupt request will take place when any of the Multi-function interrupt request flags MFnF are set. The Multi-function interrupt flags will be set when any of their included functions generate an interrupt request flag. To allow the program to branch to its respective interrupt vector address, when the Multi-function interrupt is enabled and the stack is not full, and either one of the interrupts contained within each of Multi-function interrupt occurs, a subroutine call to one of the Multi-function interrupt vectors will take place. When the interrupt is serviced, the related MultiFunction request flag will be automatically reset and the EMI bit will be automatically cleared to disable other interrupts. However, it must be noted that, although the Multi-function Interrupt request flags will be automatically reset when the interrupt is serviced, the request flags from the original source of the Multi-function interrupts will not be automatically reset and must be manually reset by the application program. TM Interrupt The Compact, Standard and Periodic TMs have two interrupts, one comes from the comparator A match situation and the other comes from the comparator P match situation. All of the TM interrupts are contained within the Multi-function Interrupts. For all of the TM types there are two interrupt request flags and two enable control bits. A TM interrupt request will take place when any of the TM request flags are set, a situation which occurs when a TM comparator P or A match situation happens. To allow the program to branch to its respective interrupt vector address, the global interrupt enable bit, EMI, respective TM Interrupt enable bit, and relevant Multi-function Interrupt enable bit, MFnE, must first be set. When the interrupt is enabled, the stack is not full and a TM comparator match situation occurs, a subroutine call to the relevant Multi-function Interrupt vector locations will take place. When the TM interrupt is serviced, the EMI bit will be automatically cleared to disable other interrupts. However, only the related MFnF flag will be automatically cleared. As the TM interrupt request flags will not be automatically cleared, they have to be cleared by the application program. Rev. 1.10 221 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU I2C Interrupt The I2C Interface Interrupt is contained within the Multi-function Interrupt. An I2C Interrupt request will take place when the I2C Interrupt request flag, IICF, is set, which occurs when an I2C slave address match, a byte of data has been received or transmitted by the I2C interface or an I2C bus time-out occurrence. To allow the program to branch to its respective interrupt vector address, the global interrupt enable bit, EMI, the associated Multi-function interrupt enable bit and the I2C Interrupt enable bit, IICE, must first be set. When the interrupt is enabled, the stack is not full and any of the above described situations occurs, a subroutine call to the respective Multi-function Interrupt vector will take place. When the interrupt is serviced, the EMI bit will be automatically cleared to disable other interrupts. However, only the Multi-function interrupt request flag will automatically be cleared. As the I2C Interrupt request flag, IICF, will not be automatically cleared, it has to be cleared by the application program. LVD Interrupt The Low Voltage Detector Interrupt is contained within the Multi-function Interrupt. An LVD Interrupt request will take place when the LVD Interrupt request flag, LVF, is set, which occurs when the Low Voltage Detector function detects a low power supply voltage. To allow the program to branch to its respective interrupt vector address, the global interrupt enable bit, EMI, Low Voltage Interrupt enable bit, LVE, and associated Multi-function interrupt enable bit, must first be set. When the interrupt is enabled, the stack is not full and a low voltage condition occurs, a subroutine call to the Multi-function Interrupt vector, will take place. When the Low Voltage Interrupt is serviced, the EMI bit will be automatically cleared to disable other interrupts. However, only the Multi-function interrupt request flag will be automatically cleared. As the LVF flag will not be automatically cleared, it has to be cleared by the application program. Comparator Interrupt The Comparator Interrupt is contained within the Multi-function Interrupt. A Comparator Interrupt request will take place when the Comparator Interrupt request flag, CPnF, is set, which occurs when the Comparator n output changes state. To allow the program to branch to its respective Multifunction interrupt vector address, the global interrupt enable bit, EMI, Comparator Interrupt enable bit, CPnE, and associated Multi-function interrupt enable bit must first be set. When the interrupt is enabled, the stack is not full and the Comparator n output changes state, a subroutine call to the respective Multi-function Interrupt vector will take place. When the Comparator n Interrupt is serviced, the EMI bit will be automatically cleared to disable other interrupts. However, only the Multi-function interrupt request flag will be automatically cleared. As the CPnF flag will not be automatically cleared, it has to be cleared by the application program. A/D Converter Interrupt The A/D Converter Interrupt is contained within the Multi-function Interrupt and controlled by the termination of an A/D conversion process. An A/D Converter Interrupt request will take place when the A/D Converter Interrupt request flag, ADF, is set, which occurs when the A/D conversion process finishes. To allow the program to branch to its respective Multi-function interrupt vector address, the global interrupt enable bit, EMI, associated Multi-function interrupt enable bit and A/D Interrupt enable bit, ADE, must first be set. When the interrupt is enabled, the stack is not full and the A/D conversion process has ended, a subroutine call to the respective Multi-function Interrupt vector will take place. When the interrupt is serviced, the EMI bit will be automatically cleared to disable other interrupts. However, only the Multi-function interrupt request flag will be automatically cleared. As the A/D Converter Interrupt flag, ADF, will not be automatically cleared, it has to be cleared by the application program. Rev. 1.10 222 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Interrupt Wake-up Function Each of the interrupt functions has the capability of waking up the microcontroller when in the SLEEP or IDLE Mode. A wake-up is generated when an interrupt request flag changes from low to high and is independent of whether the interrupt is enabled or not. Therefore, even though these devices are in the SLEEP or IDLE Mode and its system oscillator stopped, situations such as external edge transitions on the external interrupt pins, a low power supply voltage or comparator input change may cause their respective interrupt flag to be set high and consequently generate an interrupt. Care must therefore be taken if spurious wake-up situations are to be avoided. If an interrupt wake-up function is to be disabled then the corresponding interrupt request flag should be set high before the device enters the SLEEP or IDLE Mode. The interrupt enable bits have no effect on the interrupt wake-up function. Programming Considerations By disabling the relevant interrupt enable bits, a requested interrupt can be prevented from being serviced, however, once an interrupt request flag is set, it will remain in this condition in the interrupt register until the corresponding interrupt is serviced or until the request flag is cleared by the application program. Where a certain interrupt is contained within a Multi-function interrupt, then when the interrupt service routine is executed, as only the Multi-function interrupt request flags, MFnF, will be automatically cleared, the individual request flag for the function needs to be cleared by the application program. It is recommended that programs do not use the “CALL” instruction within the interrupt service subroutine. Interrupts often occur in an unpredictable manner or need to be serviced immediately. If only one stack is left and the interrupt is not well controlled, the original control sequence will be damaged once a CALL subroutine is executed in the interrupt subroutine. Every interrupt has the capability of waking up the microcontroller when it is in the SLEEP or IDLE Mode, the wake up being generated when the interrupt request flag changes from low to high. If it is required to prevent a certain interrupt from waking up the microcontroller then its respective request flag should be first set high before enter SLEEP or IDLE Mode. As only the Program Counter is pushed onto the stack, then when the interrupt is serviced, if the contents of the accumulator, status register or other registers are altered by the interrupt service program, their contents should be saved to the memory at the beginning of the interrupt service routine. To return from an interrupt subroutine, either a RET or RETI instruction may be executed. The RETI instruction in addition to executing a return to the main program also automatically sets the EMI bit high to allow further interrupts. The RET instruction however only executes a return to the main program leaving the EMI bit in its present zero state and therefore disabling the execution of further interrupts. Rev. 1.10 223 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Configuration Options Configuration options refer to certain options within the MCU that are programmed into the device during the programming process. During the development process, these options are selected using the HT-IDE software development tools. As these options are programmed into the device using the hardware programming tools, once they are selected they cannot be changed later as the application software has no control over the configuration options. All options must be defined for proper system function, the details of which are shown in the table. No. Options High Speed Crystal oscillator frequency selection 12MHz or 6MHz 1 Application Circuits VDD VDD HVDD AVDD 0.1µF VDD/UBUS USB Connector VBUS DD+ VSS 10µF 0.1µF 33Ω 47pF V33O 0.1µF 25pF 10MΩ 25pF 32768Hz XT1 AVSS 0.1µF 1N5817 224 0.1µF 10µF 0.1µF Card Power CVSS CRST CCLK CIO CDET CC4/CC8 Smart Card Connector TXn/RXn Security IC NFC IC SCL/SDA I2C Device SCKn/SCSn/ SDIn/SDOn SPI Device AN0~AN7 Cn+/Cn–/CnX Key Matrix Input 47µF CRDVCC XT2 I/O Rev. 1.10 10µF VO VSS UDN UDP 33Ω 47pF SELF 100µH 2Ω Analog Input Comparator Input/Output August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Instruction Set Introduction Central to the successful operation of any microcontroller is its instruction set, which is a set of program instruction codes that directs the microcontroller to perform certain operations. In the case of Holtek microcontroller, a comprehensive and flexible set of over 60 instructions is provided to enable programmers to implement their application with the minimum of programming overheads. For easier understanding of the various instruction codes, they have been subdivided into several functional groupings. Instruction Timing Most instructions are implemented within one instruction cycle. The exceptions to this are branch, call, or table read instructions where two instruction cycles are required. One instruction cycle is equal to 4 system clock cycles, therefore in the case of an 8MHz system oscillator, most instructions would be implemented within 0.5μs and branch or call instructions would be implemented within 1μs. Although instructions which require one more cycle to implement are generally limited to the JMP, CALL, RET, RETI and table read instructions, it is important to realize that any other instructions which involve manipulation of the Program Counter Low register or PCL will also take one more cycle to implement. As instructions which change the contents of the PCL will imply a direct jump to that new address, one more cycle will be required. Examples of such instructions would be "CLR PCL" or "MOV PCL, A". For the case of skip instructions, it must be noted that if the result of the comparison involves a skip operation then this will also take one more cycle, if no skip is involved then only one cycle is required. Moving and Transferring Data The transfer of data within the microcontroller program is one of the most frequently used operations. Making use of three kinds of MOV instructions, data can be transferred from registers to the Accumulator and vice-versa as well as being able to move specific immediate data directly into the Accumulator. One of the most important data transfer applications is to receive data from the input ports and transfer data to the output ports. Arithmetic Operations The ability to perform certain arithmetic operations and data manipulation is a necessary feature of most microcontroller applications. Within the Holtek microcontroller instruction set are a range of add and subtract instruction mnemonics to enable the necessary arithmetic to be carried out. Care must be taken to ensure correct handling of carry and borrow data when results exceed 255 for addition and less than 0 for subtraction. The increment and decrement instructions INC, INCA, DEC and DECA provide a simple means of increasing or decreasing by a value of one of the values in the destination specified. Rev. 1.10 225 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Logical and Rotate Operation The standard logical operations such as AND, OR, XOR and CPL all have their own instruction within the Holtek microcontroller instruction set. As with the case of most instructions involving data manipulation, data must pass through the Accumulator which may involve additional programming steps. In all logical data operations, the zero flag may be set if the result of the operation is zero. Another form of logical data manipulation comes from the rotate instructions such as RR, RL, RRC and RLC which provide a simple means of rotating one bit right or left. Different rotate instructions exist depending on program requirements. Rotate instructions are useful for serial port programming applications where data can be rotated from an internal register into the Carry bit from where it can be examined and the necessary serial bit set high or low. Another application which rotate data operations are used is to implement multiplication and division calculations. Branches and Control Transfer Program branching takes the form of either jumps to specified locations using the JMP instruction or to a subroutine using the CALL instruction. They differ in the sense that in the case of a subroutine call, the program must return to the instruction immediately when the subroutine has been carried out. This is done by placing a return instruction "RET" in the subroutine which will cause the program to jump back to the address right after the CALL instruction. In the case of a JMP instruction, the program simply jumps to the desired location. There is no requirement to jump back to the original jumping off point as in the case of the CALL instruction. One special and extremely useful set of branch instructions are the conditional branches. Here a decision is first made regarding the condition of a certain data memory or individual bits. Depending upon the conditions, the program will continue with the next instruction or skip over it and jump to the following instruction. These instructions are the key to decision making and branching within the program perhaps determined by the condition of certain input switches or by the condition of internal data bits. Bit Operations The ability to provide single bit operations on Data Memory is an extremely flexible feature of all Holtek microcontrollers. This feature is especially useful for output port bit programming where individual bits or port pins can be directly set high or low using either the "SET [m].i" or "CLR [m]. i" instructions respectively. The feature removes the need for programmers to first read the 8-bit output port, manipulate the input data to ensure that other bits are not changed and then output the port with the correct new data. This read-modify-write process is taken care of automatically when these bit operation instructions are used. Table Read Operations Data storage is normally implemented by using registers. However, when working with large amounts of fixed data, the volume involved often makes it inconvenient to store the fixed data in the Data Memory. To overcome this problem, Holtek microcontrollers allow an area of Program Memory to be set as a table where data can be directly stored. A set of easy to use instructions provides the means by which this fixed data can be referenced and retrieved from the Program Memory. Other Operations In addition to the above functional instructions, a range of other instructions also exist such as the "HALT" instruction for Power-down operations and instructions to control the operation of the Watchdog Timer for reliable program operations under extreme electric or electromagnetic environments. For their relevant operations, refer to the functional related sections. Rev. 1.10 226 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Instruction Set Summary The instructions related to the data memory access in the following table can be used when the desired data memory is located in Data Memory sector 0. Table Conventions x: Bits immediate data m: Data Memory address A: Accumulator i: 0~7 number of bits addr: Program memory address Mnemonic Description Cycles Flag Affected Add Data Memory to ACC Add ACC to Data Memory Add immediate data to ACC Add Data Memory to ACC with Carry Add ACC to Data memory with Carry Subtract immediate data from the ACC Subtract Data Memory from ACC Subtract Data Memory from ACC with result in Data Memory Subtract immediate data from ACC with Carry Subtract Data Memory from ACC with Carry Subtract Data Memory from ACC with Carry, result in Data Memory Decimal adjust ACC for Addition with result in Data Memory 1 1Note 1 1 1Note 1 1 1Note 1 1 1Note 1Note Z, C, AC, OV, SC Z, C, AC, OV, SC Z, C, AC, OV, SC Z, C, AC, OV, SC Z, C, AC, OV, SC Z, C, AC, OV, SC, CZ Z, C, AC, OV, SC, CZ Z, C, AC, OV, SC, CZ Z, C, AC, OV, SC, CZ Z, C, AC, OV, SC, CZ Z, C, AC, OV, SC, CZ C 1 1 1 1Note 1Note 1Note 1 1 1 1Note 1 Z Z Z Z Z Z Z Z Z Z Z Increment Data Memory with result in ACC Increment Data Memory Decrement Data Memory with result in ACC Decrement Data Memory 1 1Note 1 1Note Z Z Z Z Rotate Data Memory right with result in ACC Rotate Data Memory right Rotate Data Memory right through Carry with result in ACC Rotate Data Memory right through Carry Rotate Data Memory left with result in ACC Rotate Data Memory left Rotate Data Memory left through Carry with result in ACC Rotate Data Memory left through Carry 1 1Note 1 1Note 1 1Note 1 1Note None None C C None None C C Arithmetic ADD A,[m] ADDM A,[m] ADD A,x ADC A,[m] ADCM A,[m] SUB A,x SUB A,[m] SUBM A,[m] SBC A,x SBC A,[m] SBCM A,[m] DAA [m] Logic Operation AND A,[m] OR A,[m] XOR A,[m] ANDM A,[m] ORM A,[m] XORM A,[m] AND A,x OR A,x XOR A,x CPL [m] CPLA [m] Logical AND Data Memory to ACC Logical OR Data Memory to ACC Logical XOR Data Memory to ACC Logical AND ACC to Data Memory Logical OR ACC to Data Memory Logical XOR ACC to Data Memory Logical AND immediate Data to ACC Logical OR immediate Data to ACC Logical XOR immediate Data to ACC Complement Data Memory Complement Data Memory with result in ACC Increment & Decrement INCA [m] INC [m] DECA [m] DEC [m] Rotate RRA [m] RR [m] RRCA [m] RRC [m] RLA [m] RL [m] RLCA [m] RLC [m] Rev. 1.10 227 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Mnemonic Description Cycles Flag Affected Data Move MOV A,[m] MOV [m],A MOV A,x Move Data Memory to ACC Move ACC to Data Memory Move immediate data to ACC 1 1Note 1 None None None Clear bit of Data Memory Set bit of Data Memory 1Note 1Note None None 2 1Note 1Note 1Note 1Note 1Note 1Note 1Note 1Note 1Note 2 2 2 2 None None None None None None None None None None None None None None 2Note 2Note 2Note None None None 2Note None 1 1Note 1Note 1 1Note 1 1 None None None TO, PDF None None TO, PDF Bit Operation CLR [m].i SET [m].i Branch Operation JMP addr SZ [m] SZA [m] SZ [m].i SNZ [m] SNZ [m].i SIZ [m] SDZ [m] SIZA [m] SDZA [m] CALL addr RET RET A,x RETI Jump unconditionally Skip if Data Memory is zero Skip if Data Memory is zero with data movement to ACC Skip if bit i of Data Memory is zero Skip if Data Memory is not zero Skip if bit i of Data Memory is not zero Skip if increment Data Memory is zero Skip if decrement Data Memory is zero Skip if increment Data Memory is zero with result in ACC Skip if decrement Data Memory is zero with result in ACC Subroutine call Return from subroutine Return from subroutine and load immediate data to ACC Return from interrupt Table Read Operation TABRD [m] Read table (specific page) to TBLH and Data Memory TABRDL [m] Read table (last page) to TBLH and Data Memory ITABRD [m] Increment table pointer TBLP first and Read table to TBLH and Data Memory Increment table pointer TBLP first and Read table (last page) to TBLH and ITABRDL [m] Data Memory Miscellaneous NOP CLR [m] SET [m] CLR WDT SWAP [m] SWAPA [m] HALT No operation Clear Data Memory Set Data Memory Clear Watchdog Timer Swap nibbles of Data Memory Swap nibbles of Data Memory with result in ACC Enter power down mode Note: 1. For skip instructions, if the result of the comparison involves a skip then up to three cycles are required, if no skip takes place only one cycle is required. 2. Any instruction which changes the contents of the PCL will also require 2 cycles for execution. 3. For the “CLR WDT” instruction the TO and PDF flags may be affected by the execution status. The TO and PDF flags are cleared after the “CLR WDT” instructions is executed. Otherwise the TO and PDF flags remain unchanged. Rev. 1.10 228 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Extended Instruction Set The extended instructions are used to support the full range address access for the data memory. When the accessed data memory is located in any data memory sections except sector 0, the extended instruction can be used to access the data memory instead of using the indirect addressing access to improve the CPU firmware performance. Mnemonic Description Cycles Flag Affected Add Data Memory to ACC Add ACC to Data Memory Add Data Memory to ACC with Carry Add ACC to Data memory with Carry Subtract Data Memory from ACC Subtract Data Memory from ACC with result in Data Memory Subtract Data Memory from ACC with Carry Subtract Data Memory from ACC with Carry, result in Data Memory Decimal adjust ACC for Addition with result in Data Memory 2 2Note 2 2Note 2 2Note 2 2Note 2Note Z, C, AC, OV, SC Z, C, AC, OV, SC Z, C, AC, OV, SC Z, C, AC, OV, SC Z, C, AC, OV, SC, CZ Z, C, AC, OV, SC, CZ Z, C, AC, OV, SC, CZ Z, C, AC, OV, SC, CZ C 2 2 2 2Note 2Note 2Note 2Note 2 Z Z Z Z Z Z Z Z Increment Data Memory with result in ACC Increment Data Memory Decrement Data Memory with result in ACC Decrement Data Memory 2 2Note 2 2Note Z Z Z Z Rotate Data Memory right with result in ACC Rotate Data Memory right Rotate Data Memory right through Carry with result in ACC Rotate Data Memory right through Carry Rotate Data Memory left with result in ACC Rotate Data Memory left Rotate Data Memory left through Carry with result in ACC Rotate Data Memory left through Carry 2 2Note 2 2Note 2 2Note 2 2Note None None C C None None C C Move Data Memory to ACC Move ACC to Data Memory 2 2Note None None Clear bit of Data Memory Set bit of Data Memory 2Note 2Note None None Arithmetic LADD A,[m] LADDM A,[m] LADC A,[m] LADCM A,[m] LSUB A,[m] LSUBM A,[m] LSBC A,[m] LSBCM A,[m] LDAA [m] Logic Operation LAND A,[m] LOR A,[m] LXOR A,[m] LANDM A,[m] LORM A,[m] LXORM A,[m] LCPL [m] LCPLA [m] Logical AND Data Memory to ACC Logical OR Data Memory to ACC Logical XOR Data Memory to ACC Logical AND ACC to Data Memory Logical OR ACC to Data Memory Logical XOR ACC to Data Memory Complement Data Memory Complement Data Memory with result in ACC Increment & Decrement LINCA [m] LINC [m] LDECA [m] LDEC [m] Rotate LRRA [m] LRR [m] LRRCA [m] LRRC [m] LRLA [m] LRL [m] LRLCA [m] LRLC [m] Data Move LMOV A,[m] LMOV [m],A Bit Operation LCLR [m].i LSET [m].i Rev. 1.10 229 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Mnemonic Description Cycles Flag Affected Branch LSZ [m] LSZA [m] LSNZ [m] LSZ [m].i LSNZ [m].i LSIZ [m] LSDZ [m] LSIZA [m] LSDZA [m] Skip if Data Memory is zero Skip if Data Memory is zero with data movement to ACC Skip if Data Memory is not zero Skip if bit i of Data Memory is zero Skip if bit i of Data Memory is not zero Skip if increment Data Memory is zero Skip if decrement Data Memory is zero Skip if increment Data Memory is zero with result in ACC Skip if decrement Data Memory is zero with result in ACC 2Note 2Note 2Note 2Note 2Note 2Note 2Note 2Note 2Note None None None None None None None None None 3Note 3Note 3Note None None None 3Note None 2Note 2Note 2Note 2 None None None None Table Read LTABRD [m] Read table to TBLH and Data Memory LTABRDL [m] Read table (last page) to TBLH and Data Memory LITABRD [m] Increment table pointer TBLP first and Read table to TBLH and Data Memory Increment table pointer TBLP first and Read table (last page) to TBLH and LITABRDL [m] Data Memory Miscellaneous LCLR [m] LSET [m] LSWAP [m] LSWAPA [m] Clear Data Memory Set Data Memory Swap nibbles of Data Memory Swap nibbles of Data Memory with result in ACC Note: 1. For these extended skip instructions, if the result of the comparison involves a skip then up to four cycles are required, if no skip takes place two cycles is required. 2. Any extended instruction which changes the contents of the PCL register will also require three cycles for execution. Rev. 1.10 230 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Instruction Definition ADC A,[m] Description Operation Affected flag(s) Add Data Memory to ACC with Carry The contents of the specified Data Memory, Accumulator and the carry flag are added. The result is stored in the Accumulator. ACC ← ACC + [m] + C OV, Z, AC, C, SC ADCM A,[m] Description Operation Affected flag(s) Add ACC to Data Memory with Carry The contents of the specified Data Memory, Accumulator and the carry flag are added. The result is stored in the specified Data Memory. [m] ← ACC + [m] + C OV, Z, AC, C, SC Add Data Memory to ACC ADD A,[m] Description The contents of the specified Data Memory and the Accumulator are added. The result is stored in the Accumulator. Operation Affected flag(s) ACC ← ACC + [m] OV, Z, AC, C, SC ADD A,x Description Operation Affected flag(s) Add immediate data to ACC The contents of the Accumulator and the specified immediate data are added. The result is stored in the Accumulator. ACC ← ACC + x OV, Z, AC, C, SC ADDM A,[m] Description Operation Affected flag(s) Add ACC to Data Memory The contents of the specified Data Memory and the Accumulator are added. The result is stored in the specified Data Memory. [m] ← ACC + [m] OV, Z, AC, C, SC AND A,[m] Description Operation Affected flag(s) Logical AND Data Memory to ACC Data in the Accumulator and the specified Data Memory perform a bitwise logical AND operation. The result is stored in the Accumulator. ACC ← ACC ″AND″ [m] Z AND A,x Description Operation Affected flag(s) Logical AND immediate data to ACC Data in the Accumulator and the specified immediate data perform a bit wise logical AND operation. The result is stored in the Accumulator. ACC ← ACC ″AND″ x Z ANDM A,[m] Description Operation Affected flag(s) Logical AND ACC to Data Memory Data in the specified Data Memory and the Accumulator perform a bitwise logical AND operation. The result is stored in the Data Memory. [m] ← ACC ″AND″ [m] Z Rev. 1.10 231 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU CALL addr Description Operation Affected flag(s) Subroutine call Unconditionally calls a subroutine at the specified address. The Program Counter then increments by 1 to obtain the address of the next instruction which is then pushed onto the stack. The specified address is then loaded and the program continues execution from this new address. As this instruction requires an additional operation, it is a two cycle instruction. Stack ← Program Counter + 1 Program Counter ← addr None CLR [m] Description Operation Affected flag(s) Clear Data Memory Each bit of the specified Data Memory is cleared to 0. [m] ← 00H None CLR [m].i Description Operation Affected flag(s) Clear bit of Data Memory Bit i of the specified Data Memory is cleared to 0. [m].i ← 0 None CLR WDT Description Operation Affected flag(s) Clear Watchdog Timer The TO, PDF flags and the WDT are all cleared. WDT cleared TO ← 0 PDF ← 0 TO, PDF CPL [m] Description Operation Affected flag(s) Complement Data Memory Each bit of the specified Data Memory is logically complemented (1′s complement). Bits which previously contained a 1 are changed to 0 and vice versa. [m] ← [m] Z CPLA [m] Description Operation Affected flag(s) Complement Data Memory with result in ACC Each bit of the specified Data Memory is logically complemented (1′s complement). Bits which previously contained a 1 are changed to 0 and vice versa. The complemented result is stored in the Accumulator and the contents of the Data Memory remain unchanged. ACC ← [m] Z DAA [m] Description Operation Affected flag(s) Decimal-Adjust ACC for addition with result in Data Memory Convert the contents of the Accumulator value to a BCD (Binary Coded Decimal) value resulting from the previous addition of two BCD variables. If the low nibble is greater than 9 or if AC flag is set, then a value of 6 will be added to the low nibble. Otherwise the low nibble remains unchanged. If the high nibble is greater than 9 or if the C flag is set, then a value of 6 will be added to the high nibble. Essentially, the decimal conversion is performed by adding 00H, 06H, 60H or 66H depending on the Accumulator and flag conditions. Only the C flag may be affected by this instruction which indicates that if the original BCD sum is greater than 100, it allows multiple precision decimal addition. [m] ← ACC + 00H or [m] ← ACC + 06H or [m] ← ACC + 60H or [m] ← ACC + 66H C Rev. 1.10 232 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU DEC [m] Description Operation Affected flag(s) Decrement Data Memory Data in the specified Data Memory is decremented by 1. [m] ← [m] − 1 Z DECA [m] Description Operation Affected flag(s) Decrement Data Memory with result in ACC Data in the specified Data Memory is decremented by 1. The result is stored in the Accumulator. The contents of the Data Memory remain unchanged. ACC ← [m] − 1 Z HALT Description Operation Affected flag(s) Enter power down mode This instruction stops the program execution and turns off the system clock. The contents of the Data Memory and registers are retained. The WDT and prescaler are cleared. The power down flag PDF is set and the WDT time-out flag TO is cleared. TO ← 0 PDF ← 1 TO, PDF INC [m] Description Operation Affected flag(s) Increment Data Memory Data in the specified Data Memory is incremented by 1. [m] ← [m] + 1 Z INCA [m] Description Operation Affected flag(s) Increment Data Memory with result in ACC Data in the specified Data Memory is incremented by 1. The result is stored in the Accumulator. The contents of the Data Memory remain unchanged. ACC ← [m] + 1 Z JMP addr Description Operation Affected flag(s) Jump unconditionally The contents of the Program Counter are replaced with the specified address. Program execution then continues from this new address. As this requires the insertion of a dummy instruction while the new address is loaded, it is a two cycle instruction. Program Counter ← addr None MOV A,[m] Description Operation Affected flag(s) Move Data Memory to ACC The contents of the specified Data Memory are copied to the Accumulator. ACC ← [m] None MOV A,x Description Operation Affected flag(s) Move immediate data to ACC The immediate data specified is loaded into the Accumulator. ACC ← x None MOV [m],A Description Operation Affected flag(s) Move ACC to Data Memory The contents of the Accumulator are copied to the specified Data Memory. [m] ← ACC None Rev. 1.10 233 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU NOP Description Operation Affected flag(s) No operation No operation is performed. Execution continues with the next instruction. No operation None OR A,[m] Description Operation Affected flag(s) Logical OR Data Memory to ACC Data in the Accumulator and the specified Data Memory perform a bitwise logical OR operation. The result is stored in the Accumulator. ACC ← ACC ″OR″ [m] Z OR A,x Description Operation Affected flag(s) Logical OR immediate data to ACC Data in the Accumulator and the specified immediate data perform a bitwise logical OR operation. The result is stored in the Accumulator. ACC ← ACC ″OR″ x Z ORM A,[m] Description Operation Affected flag(s) Logical OR ACC to Data Memory Data in the specified Data Memory and the Accumulator perform a bitwise logical OR operation. The result is stored in the Data Memory. [m] ← ACC ″OR″ [m] Z RET Description Operation Affected flag(s) Return from subroutine The Program Counter is restored from the stack. Program execution continues at the restored address. Program Counter ← Stack None RET A,x Description Operation Affected flag(s) Return from subroutine and load immediate data to ACC The Program Counter is restored from the stack and the Accumulator loaded with the specified immediate data. Program execution continues at the restored address. Program Counter ← Stack ACC ← x None RETI Description Operation Affected flag(s) Return from interrupt The Program Counter is restored from the stack and the interrupts are re-enabled by setting the EMI bit. EMI is the master interrupt global enable bit. If an interrupt was pending when the RETI instruction is executed, the pending Interrupt routine will be processed before returning to the main program. Program Counter ← Stack EMI ← 1 None RL [m] Description Operation Affected flag(s) Rotate Data Memory left The contents of the specified Data Memory are rotated left by 1 bit with bit 7 rotated into bit 0. [m].(i+1) ← [m].i; (i=0~6) [m].0 ← [m].7 None Rev. 1.10 234 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU RLA [m] Description Operation Affected flag(s) Rotate Data Memory left with result in ACC The contents of the specified Data Memory are rotated left by 1 bit with bit 7 rotated into bit 0. The rotated result is stored in the Accumulator and the contents of the Data Memory remain unchanged. ACC.(i+1) ← [m].i; (i=0~6) ACC.0 ← [m].7 None RLC [m] Description Operation Affected flag(s) Rotate Data Memory left through Carry The contents of the specified Data Memory and the carry flag are rotated left by 1 bit. Bit 7 replaces the Carry bit and the original carry flag is rotated into bit 0. [m].(i+1) ← [m].i; (i=0~6) [m].0 ← C C ← [m].7 C RLCA [m] Description Operation Affected flag(s) Rotate Data Memory left through Carry with result in ACC Data in the specified Data Memory and the carry flag are rotated left by 1 bit. Bit 7 replaces the Carry bit and the original carry flag is rotated into the bit 0. The rotated result is stored in the Accumulator and the contents of the Data Memory remain unchanged. ACC.(i+1) ← [m].i; (i=0~6) ACC.0 ← C C ← [m].7 C RR [m] Description Operation Affected flag(s) Rotate Data Memory right The contents of the specified Data Memory are rotated right by 1 bit with bit 0 rotated into bit 7. [m].i ← [m].(i+1); (i=0~6) [m].7 ← [m].0 None RRA [m] Description Operation Affected flag(s) Rotate Data Memory right with result in ACC Data in the specified Data Memory and the carry flag are rotated right by 1 bit with bit 0 rotated into bit 7. The rotated result is stored in the Accumulator and the contents of the Data Memory remain unchanged. ACC.i ← [m].(i+1); (i=0~6) ACC.7 ← [m].0 None RRC [m] Description Operation Affected flag(s) Rotate Data Memory right through Carry The contents of the specified Data Memory and the carry flag are rotated right by 1 bit. Bit 0 replaces the Carry bit and the original carry flag is rotated into bit 7. [m].i ← [m].(i+1); (i=0~6) [m].7 ← C C ← [m].0 C Rev. 1.10 235 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU RRCA [m] Description Operation Affected flag(s) Rotate Data Memory right through Carry with result in ACC Data in the specified Data Memory and the carry flag are rotated right by 1 bit. Bit 0 replaces the Carry bit and the original carry flag is rotated into bit 7. The rotated result is stored in the Accumulator and the contents of the Data Memory remain unchanged. ACC.i ← [m].(i+1); (i=0~6) ACC.7 ← C C ← [m].0 C SBC A,[m] Description Operation Affected flag(s) Subtract Data Memory from ACC with Carry The contents of the specified Data Memory and the complement of the carry flag are subtracted from the Accumulator. The result is stored in the Accumulator. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. ACC ← ACC − [m] − C OV, Z, AC, C, SC, CZ SBC A, x Description Operation Affected flag(s) Subtract immediate data from ACC with Carry The immediate data and the complement of the carry flag are subtracted from the Accumulator. The result is stored in the Accumulator. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. ACC ← ACC - [m] - C OV, Z, AC, C, SC, CZ SBCM A,[m] Description Operation Affected flag(s) Subtract Data Memory from ACC with Carry and result in Data Memory The contents of the specified Data Memory and the complement of the carry flag are subtracted from the Accumulator. The result is stored in the Data Memory. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. [m] ← ACC − [m] − C OV, Z, AC, C, SC, CZ SDZ [m] Description Operation Affected flag(s) Skip if decrement Data Memory is 0 The contents of the specified Data Memory are first decremented by 1. If the result is 0 the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program proceeds with the following instruction. [m] ← [m] − 1 Skip if [m]=0 None SDZA [m] Description Operation Affected flag(s) Skip if decrement Data Memory is zero with result in ACC The contents of the specified Data Memory are first decremented by 1. If the result is 0, the following instruction is skipped. The result is stored in the Accumulator but the specified Data Memory contents remain unchanged. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0, the program proceeds with the following instruction. ACC ← [m] − 1 Skip if ACC=0 None Rev. 1.10 236 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU SET [m] Description Operation Affected flag(s) Set Data Memory Each bit of the specified Data Memory is set to 1. [m] ← FFH None SET [m].i Description Operation Affected flag(s) Set bit of Data Memory Bit i of the specified Data Memory is set to 1. [m].i ← 1 None SIZ [m] Description Operation Affected flag(s) Skip if increment Data Memory is 0 The contents of the specified Data Memory are first incremented by 1. If the result is 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program proceeds with the following instruction. [m] ← [m] + 1 Skip if [m]=0 None SIZA [m] Description Operation Affected flag(s) Skip if increment Data Memory is zero with result in ACC The contents of the specified Data Memory are first incremented by 1. If the result is 0, the following instruction is skipped. The result is stored in the Accumulator but the specified Data Memory contents remain unchanged. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program proceeds with the following instruction. ACC ← [m] + 1 Skip if ACC=0 None SNZ [m].i Description Operation Affected flag(s) Skip if Data Memory is not 0 If the specified Data Memory is not 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is 0 the program proceeds with the following instruction. Skip if [m].i ≠ 0 None SNZ [m] Description Operation Affected flag(s) Skip if Data Memory is not 0 If the specified Data Memory is not 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is 0 the program proceeds with the following instruction. Skip if [m]≠ 0 None SUB A,[m] Description Operation Affected flag(s) Subtract Data Memory from ACC The specified Data Memory is subtracted from the contents of the Accumulator. The result is stored in the Accumulator. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. ACC ← ACC − [m] OV, Z, AC, C, SC, CZ Rev. 1.10 237 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU SUBM A,[m] Description Operation Affected flag(s) Subtract Data Memory from ACC with result in Data Memory The specified Data Memory is subtracted from the contents of the Accumulator. The result is stored in the Data Memory. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. [m] ← ACC − [m] OV, Z, AC, C, SC, CZ SUB A,x Description Operation Affected flag(s) Subtract immediate data from ACC The immediate data specified by the code is subtracted from the contents of the Accumulator. The result is stored in the Accumulator. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. ACC ← ACC − x OV, Z, AC, C, SC, CZ SWAP [m] Description Operation Affected flag(s) Swap nibbles of Data Memory The low-order and high-order nibbles of the specified Data Memory are interchanged. [m].3~[m].0 ↔ [m].7~[m].4 None SWAPA [m] Description Operation Affected flag(s) Swap nibbles of Data Memory with result in ACC The low-order and high-order nibbles of the specified Data Memory are interchanged. The result is stored in the Accumulator. The contents of the Data Memory remain unchanged. ACC.3~ACC.0 ← [m].7~[m].4 ACC.7~ACC.4 ← [m].3~[m].0 None SZ [m] Description Operation Affected flag(s) Skip if Data Memory is 0 If the contents of the specified Data Memory is 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program proceeds with the following instruction. Skip if [m]=0 None SZA [m] Description Operation Affected flag(s) Skip if Data Memory is 0 with data movement to ACC The contents of the specified Data Memory are copied to the Accumulator. If the value is zero, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program proceeds with the following instruction. ACC ← [m] Skip if [m]=0 None SZ [m].i Description Operation Affected flag(s) Skip if bit i of Data Memory is 0 If bit i of the specified Data Memory is 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0, the program proceeds with the following instruction. Skip if [m].i=0 None Rev. 1.10 238 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU TABRD [m] Description Operation Affected flag(s) Read table (specific page) to TBLH and Data Memory The low byte of the program code (specific page) addressed by the table pointer pair (TBLP and TBHP) is moved to the specified Data Memory and the high byte moved to TBLH. [m] ← program code (low byte) TBLH ← program code (high byte) None TABRDL [m] Description Operation Affected flag(s) Read table (last page) to TBLH and Data Memory The low byte of the program code (last page) addressed by the table pointer (TBLP) is moved to the specified Data Memory and the high byte moved to TBLH. [m] ← program code (low byte) TBLH ← program code (high byte) None ITABRD [m] Description Operation Affected flag(s) Increment table pointer low byte first and read table to TBLH and Data Memory Increment table pointer low byte, TBLP, first and then the program code addressed by the table pointer (TBHP and TBLP) is moved to the specified Data Memory and the high byte moved to TBLH. [m] ← program code (low byte) TBLH ← program code (high byte) None ITABRDL [m] Description Operation Affected flag(s) Increment table pointer low byte first and read table (last page) to TBLH and Data Memory Increment table pointer low byte, TBLP, first and then the low byte of the program code (last page) addressed by the table pointer (TBLP) is moved to the specified Data Memory and the high byte moved to TBLH. [m] ← program code (low byte) TBLH ← program code (high byte) None XOR A,[m] Description Operation Affected flag(s) Logical XOR Data Memory to ACC Data in the Accumulator and the specified Data Memory perform a bitwise logical XOR operation. The result is stored in the Accumulator. ACC ← ACC ″XOR″ [m] Z XORM A,[m] Description Operation Affected flag(s) Logical XOR ACC to Data Memory Data in the specified Data Memory and the Accumulator perform a bitwise logical XOR operation. The result is stored in the Data Memory. [m] ← ACC ″XOR″ [m] Z XOR A,x Description Operation Affected flag(s) Logical XOR immediate data to ACC Data in the Accumulator and the specified immediate data perform a bitwise logical XOR operation. The result is stored in the Accumulator. ACC ← ACC ″XOR″ x Z Rev. 1.10 239 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Extended Instruction Definition The extended instructions are used to directly access the data stored in any data memory sections. LADC A,[m] Description Operation Affected flag(s) Add Data Memory to ACC with Carry The contents of the specified Data Memory, Accumulator and the carry flag are added. The result is stored in the Accumulator. ACC ← ACC + [m] + C OV, Z, AC, C, SC LADCM A,[m] Description Operation Affected flag(s) Add ACC to Data Memory with Carry The contents of the specified Data Memory, Accumulator and the carry flag are added. The result is stored in the specified Data Memory. [m] ← ACC + [m] + C OV, Z, AC, C, SC LADD A,[m] Description The contents of the specified Data Memory and the Accumulator are added. The result is stored in the Accumulator. Operation Affected flag(s) ACC ← ACC + [m] OV, Z, AC, C, SC LADDM A,[m] Description Operation Affected flag(s) Add ACC to Data Memory The contents of the specified Data Memory and the Accumulator are added. The result is stored in the specified Data Memory. [m] ← ACC + [m] OV, Z, AC, C, SC LAND A,[m] Description Operation Affected flag(s) Logical AND Data Memory to ACC Data in the Accumulator and the specified Data Memory perform a bitwise logical AND operation. The result is stored in the Accumulator. ACC ← ACC ″AND″ [m] Z LANDM A,[m] Description Operation Affected flag(s) Logical AND ACC to Data Memory Data in the specified Data Memory and the Accumulator perform a bitwise logical AND operation. The result is stored in the Data Memory. [m] ← ACC ″AND″ [m] Z LCLR [m] Description Operation Affected flag(s) Clear Data Memory Each bit of the specified Data Memory is cleared to 0. [m] ← 00H None LCLR [m].i Description Operation Affected flag(s) Clear bit of Data Memory Bit i of the specified Data Memory is cleared to 0. [m].i ← 0 None Rev. 1.10 Add Data Memory to ACC 240 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU LCPL [m] Description Operation Affected flag(s) Complement Data Memory Each bit of the specified Data Memory is logically complemented (1′s complement). Bits which previously contained a 1 are changed to 0 and vice versa. [m] ← [m] Z LCPLA [m] Description Operation Affected flag(s) Complement Data Memory with result in ACC Each bit of the specified Data Memory is logically complemented (1′s complement). Bits which previously contained a 1 are changed to 0 and vice versa. The complemented result is stored in the Accumulator and the contents of the Data Memory remain unchanged. ACC ← [m] Z LDAA [m] Description Operation Affected flag(s) Decimal-Adjust ACC for addition with result in Data Memory Convert the contents of the Accumulator value to a BCD (Binary Coded Decimal) value resulting from the previous addition of two BCD variables. If the low nibble is greater than 9 or if AC flag is set, then a value of 6 will be added to the low nibble. Otherwise the low nibble remains unchanged. If the high nibble is greater than 9 or if the C flag is set, then a value of 6 will be added to the high nibble. Essentially, the decimal conversion is performed by adding 00H, 06H, 60H or 66H depending on the Accumulator and flag conditions. Only the C flag may be affected by this instruction which indicates that if the original BCD sum is greater than 100, it allows multiple precision decimal addition. [m] ← ACC + 00H or [m] ← ACC + 06H or [m] ← ACC + 60H or [m] ← ACC + 66H C LDEC [m] Description Operation Affected flag(s) Decrement Data Memory Data in the specified Data Memory is decremented by 1. [m] ← [m] − 1 Z LDECA [m] Description Operation Affected flag(s) Decrement Data Memory with result in ACC Data in the specified Data Memory is decremented by 1. The result is stored in the Accumulator. The contents of the Data Memory remain unchanged. ACC ← [m] − 1 Z LINC [m] Description Operation Affected flag(s) Increment Data Memory Data in the specified Data Memory is incremented by 1. [m] ← [m] + 1 Z LINCA [m] Description Operation Affected flag(s) Increment Data Memory with result in ACC Data in the specified Data Memory is incremented by 1. The result is stored in the Accumulator. The contents of the Data Memory remain unchanged. ACC ← [m] + 1 Z Rev. 1.10 241 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU LMOV A,[m] Description Operation Affected flag(s) Move Data Memory to ACC The contents of the specified Data Memory are copied to the Accumulator. ACC ← [m] None LMOV [m],A Description Operation Affected flag(s) Move ACC to Data Memory The contents of the Accumulator are copied to the specified Data Memory. [m] ← ACC None LOR A,[m] Description Operation Affected flag(s) Logical OR Data Memory to ACC Data in the Accumulator and the specified Data Memory perform a bitwise logical OR operation. The result is stored in the Accumulator. ACC ← ACC ″OR″ [m] Z LORM A,[m] Description Operation Affected flag(s) Logical OR ACC to Data Memory Data in the specified Data Memory and the Accumulator perform a bitwise logical OR operation. The result is stored in the Data Memory. [m] ← ACC ″OR″ [m] Z LRL [m] Description Operation Affected flag(s) Rotate Data Memory left The contents of the specified Data Memory are rotated left by 1 bit with bit 7 rotated into bit 0. [m].(i+1) ← [m].i; (i=0~6) [m].0 ← [m].7 None LRLA [m] Description Operation Affected flag(s) Rotate Data Memory left with result in ACC The contents of the specified Data Memory are rotated left by 1 bit with bit 7 rotated into bit 0. The rotated result is stored in the Accumulator and the contents of the Data Memory remain unchanged. ACC.(i+1) ← [m].i; (i=0~6) ACC.0 ← [m].7 None LRLC [m] Description Operation Affected flag(s) Rotate Data Memory left through Carry The contents of the specified Data Memory and the carry flag are rotated left by 1 bit. Bit 7 replaces the Carry bit and the original carry flag is rotated into bit 0. [m].(i+1) ← [m].i; (i=0~6) [m].0 ← C C ← [m].7 C LRLCA [m] Description Operation Affected flag(s) Rotate Data Memory left through Carry with result in ACC Data in the specified Data Memory and the carry flag are rotated left by 1 bit. Bit 7 replaces the Carry bit and the original carry flag is rotated into the bit 0. The rotated result is stored in the Accumulator and the contents of the Data Memory remain unchanged. ACC.(i+1) ← [m].i; (i=0~6) ACC.0 ← C C ← [m].7 C Rev. 1.10 242 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU LRR [m] Description Operation Affected flag(s) Rotate Data Memory right The contents of the specified Data Memory are rotated right by 1 bit with bit 0 rotated into bit 7. [m].i ← [m].(i+1); (i=0~6) [m].7 ← [m].0 None LRRA [m] Description Operation Affected flag(s) Rotate Data Memory right with result in ACC Data in the specified Data Memory and the carry flag are rotated right by 1 bit with bit 0 rotated into bit 7. The rotated result is stored in the Accumulator and the contents of the Data Memory remain unchanged. ACC.i ← [m].(i+1); (i=0~6) ACC.7 ← [m].0 None LRRC [m] Description Operation Affected flag(s) Rotate Data Memory right through Carry The contents of the specified Data Memory and the carry flag are rotated right by 1 bit. Bit 0 replaces the Carry bit and the original carry flag is rotated into bit 7. [m].i ← [m].(i+1); (i=0~6) [m].7 ← C C ← [m].0 C LRRCA [m] Description Operation Affected flag(s) Rotate Data Memory right through Carry with result in ACC Data in the specified Data Memory and the carry flag are rotated right by 1 bit. Bit 0 replaces the Carry bit and the original carry flag is rotated into bit 7. The rotated result is stored in the Accumulator and the contents of the Data Memory remain unchanged. ACC.i ← [m].(i+1); (i=0~6) ACC.7 ← C C ← [m].0 C LSBC A,[m] Description Operation Affected flag(s) Subtract Data Memory from ACC with Carry The contents of the specified Data Memory and the complement of the carry flag are subtracted from the Accumulator. The result is stored in the Accumulator. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. ACC ← ACC − [m] − C OV, Z, AC, C, SC, CZ LSBCM A,[m] Description Operation Affected flag(s) Subtract Data Memory from ACC with Carry and result in Data Memory The contents of the specified Data Memory and the complement of the carry flag are subtracted from the Accumulator. The result is stored in the Data Memory. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. [m] ← ACC − [m] − C OV, Z, AC, C, SC, CZ Rev. 1.10 243 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU LSDZ [m] Description Operation Affected flag(s) Skip if decrement Data Memory is 0 The contents of the specified Data Memory are first decremented by 1. If the result is 0 the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program proceeds with the following instruction. [m] ← [m] − 1 Skip if [m]=0 None LSDZA [m] Description Operation Affected flag(s) Skip if decrement Data Memory is zero with result in ACC The contents of the specified Data Memory are first decremented by 1. If the result is 0, the following instruction is skipped. The result is stored in the Accumulator but the specified Data Memory contents remain unchanged. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0, the program proceeds with the following instruction. ACC ← [m] − 1 Skip if ACC=0 None LSET [m] Description Operation Affected flag(s) Set Data Memory Each bit of the specified Data Memory is set to 1. [m] ← FFH None LSET [m].i Description Operation Affected flag(s) Set bit of Data Memory Bit i of the specified Data Memory is set to 1. [m].i ← 1 None LSIZ [m] Description Operation Affected flag(s) Skip if increment Data Memory is 0 The contents of the specified Data Memory are first incremented by 1. If the result is 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program proceeds with the following instruction. [m] ← [m] + 1 Skip if [m]=0 None LSIZA [m] Description Operation Affected flag(s) Skip if increment Data Memory is zero with result in ACC The contents of the specified Data Memory are first incremented by 1. If the result is 0, the following instruction is skipped. The result is stored in the Accumulator but the specified Data Memory contents remain unchanged. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program proceeds with the following instruction. ACC ← [m] + 1 Skip if ACC=0 None LSNZ [m].i Description Operation Affected flag(s) Skip if Data Memory is not 0 If the specified Data Memory is not 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is 0 the program proceeds with the following instruction. Skip if [m].i ≠ 0 None Rev. 1.10 244 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU LSNZ [m] Description Operation Affected flag(s) Skip if Data Memory is not 0 If the content of the specified Data Memory is not 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is 0 the program proceeds with the following instruction. Skip if [m] ≠ 0 None LSUB A,[m] Description Operation Affected flag(s) Subtract Data Memory from ACC The specified Data Memory is subtracted from the contents of the Accumulator. The result is stored in the Accumulator. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. ACC ← ACC − [m] OV, Z, AC, C, SC, CZ LSUBM A,[m] Description Operation Affected flag(s) Subtract Data Memory from ACC with result in Data Memory The specified Data Memory is subtracted from the contents of the Accumulator. The result is stored in the Data Memory. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. [m] ← ACC − [m] OV, Z, AC, C, SC, CZ LSWAP [m] Description Operation Affected flag(s) Swap nibbles of Data Memory The low-order and high-order nibbles of the specified Data Memory are interchanged. [m].3~[m].0 ↔ [m].7~[m].4 None LSWAPA [m] Description Operation Affected flag(s) Swap nibbles of Data Memory with result in ACC The low-order and high-order nibbles of the specified Data Memory are interchanged. The result is stored in the Accumulator. The contents of the Data Memory remain unchanged. ACC.3~ACC.0 ← [m].7~[m].4 ACC.7~ACC.4 ← [m].3~[m].0 None LSZ [m] Description Operation Affected flag(s) Skip if Data Memory is 0 If the contents of the specified Data Memory is 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program proceeds with the following instruction. Skip if [m]=0 None LSZA [m] Description Operation Affected flag(s) Skip if Data Memory is 0 with data movement to ACC The contents of the specified Data Memory are copied to the Accumulator. If the value is zero, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program proceeds with the following instruction. ACC ← [m] Skip if [m]=0 None Rev. 1.10 245 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU LSZ [m].i Description Operation Affected flag(s) Skip if bit i of Data Memory is 0 If bit i of the specified Data Memory is 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0, the program proceeds with the following instruction. Skip if [m].i=0 None LTABRD [m] Description Operation Affected flag(s) Read table (current page) to TBLH and Data Memory The low byte of the program code (current page) addressed by the table pointer (TBLP) is moved to the specified Data Memory and the high byte moved to TBLH. [m] ← program code (low byte) TBLH ← program code (high byte) None LTABRDL [m] Description Operation Affected flag(s) Read table (last page) to TBLH and Data Memory The low byte of the program code (last page) addressed by the table pointer (TBLP) is moved to the specified Data Memory and the high byte moved to TBLH. [m] ← program code (low byte) TBLH ← program code (high byte) None LITABRD [m] Description Operation Increment table pointer low byte first and read table to TBLH and Data Memory Increment table pointer low byte, TBLP, first and then the program code addressed by the table pointer (TBHP and TBLP) is moved to the specified Data Memory and the high byte moved to TBLH. [m] ← program code (low byte) TBLH ← program code (high byte) Affected flag(s) None LITABRDL [m] Description Operation Affected flag(s) Increment table pointer low byte first and read table (last page) to TBLH and Data Memory Increment table pointer low byte, TBLP, first and then the low byte of the program code (last page) addressed by the table pointer (TBLP) is moved to the specified Data Memory and the high byte moved to TBLH. [m] ← program code (low byte) TBLH ← program code (high byte) None LXOR A,[m] Description Operation Affected flag(s) Logical XOR Data Memory to ACC Data in the Accumulator and the specified Data Memory perform a bitwise logical XOR operation. The result is stored in the Accumulator. ACC ← ACC ″XOR″ [m] Z LXORM A,[m] Description Operation Affected flag(s) Logical XOR ACC to Data Memory Data in the specified Data Memory and the Accumulator perform a bitwise logical XOR operation. The result is stored in the Data Memory. [m] ← ACC ″XOR″ [m] Z Rev. 1.10 246 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Package Information Note that the package information provided here is for consultation purposes only. As this information may be updated at regular intervals users are reminded to consult the Holtek website for the latest version of the package information. Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be transferred to the relevant website page. • Further Package Information (include Outline Dimensions, Product Tape and Reel Specifications) • Packing Meterials Information • Carton information Rev. 1.10 247 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU 48-pin LQFP (7mm × 7mm) Outline Dimensions Symbol Dimensions in inch Min. Nom. Max. A — 0.354 BSC — B — 0.276 BSC — C — 0.354 BSC — D — 0.276 BSC — E — 0.020 BSC — F 0.007 0.009 0.011 G 0.053 0.055 0.057 H — — 0.063 I 0.002 — 0.006 J 0.018 0.024 0.030 K 0.004 — 0.008 α 0° — 7° Symbol Rev. 1.10 Dimensions in mm Min. Nom. Max. A — 9.00 BSC — B — 7.00 BSC — C — 9.00 BSC — D — 7.00 BSC — E — 0.50 BSC — F 0.17 0.22 0.27 G 1.35 1.40 1.45 H — — 1.60 I 0.05 — 0.15 J 0.45 0.60 0.75 K 0.09 — 0.20 α 0° — 7° 248 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU 64-pin LQFP (7mm × 7mm) Outline Dimensions Symbol Min. Nom. Max. A — 0.354 BSC — B — 0.276 BSC — C — 0.354 BSC — D — 0.276 BSC — E — 0.016 BSC — F 0.005 0.007 0.009 G 0.053 0.055 0.057 H — — 0.063 I 0.002 — 0.006 J 0.018 0.024 0.030 K 0.004 — 0.008 α 0° — 7° Symbol Rev. 1.10 Dimensions in inch Dimensions in mm Min. Nom. Max. A — 9.00 BSC — B — 7.00 BSC — C — 9.00 BSC — D — 7.00 BSC — E — 0.40 BSC — F 0.13 0.18 0.23 G 1.35 1.40 1.45 H — — 1.60 I 0.05 — 0.15 J 0.45 0.60 0.75 K 0.09 — 0.20 α 0° — 7° 249 August 20, 2015 HT66F4360/HT66F4370 Smart Card Reader 8-Bit Flash MCU Copyright© 2015 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek's products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. Rev. 1.10 250 August 20, 2015