HT82K95EE/HT82K95AE USB Multimedia Keyboard Encoder 8-Bit MCU Technical Document · Tools Information · FAQs · Application Note Features · Operating voltage: · 160´8 data memory RAM fSYS=6M/12MHz: 4.2V~5.5V · 128´8 data EEPROM · Low voltage reset function · All I/O ports support wake-up options · 32 bidirectional I/O lines (max.) · HALT function and wake-up feature reduce power · 8-bit programmable timer/event counter with over- consumption flow interrupt · 8-level subroutine nesting · 16-bit programmable timer/event counter and over- · Up to 0.33ms instruction cycle with 12MHz system flow interrupts · Crystal oscillator (6MHz or 12MHz) clock at VDD=5V · Bit manipulation instruction · Watchdog Timer · 15-bit table read instruction · PS2 and USB modes supported · 63 powerful instructions · USB1.1 low speed function · All instructions in one or two machine cycles · 3 endpoints supported (endpoint 0 included) · 28-pin SOP package · 4096´15 program memory ROM General Description This device is an 8-bit high performance RISC architecture microcontroller designed for USB product applications. It is particularly suitable for use in products such as keyboards. A HALT feature is included to reduce power consumption. The mask version HT82K95AE is fully pin and functionally compatible with the OTP version HT82K95EE device. Rev. 1.20 There are two dice in the HT82K95EE/HT82K95AE package: one is the HT82K95E/HT82K95A MCU, the other is a 128´8 bits EEPROM used for data memory purpose. The two dice are wire-bonded to form HT82K95EE/HT82K95AE. 1 August 28, 2006 HT82K95EE/HT82K95AE Block Diagram U S B D + /C L K U S B D -/D A T A V 3 3 O T M R 1 C U S B 1 .1 P S 2 M T M R 1 U fS Y S X /4 P A 7 /T M R 1 B P In te rru p t C ir c u it S T A C K P ro g ra m R O M P ro g ra m C o u n te r M T M R 0 U fS /4 Y S P A 6 /T M R 0 X T M R 0 C IN T C E N /D IS W D T S In s tr u c tio n R e g is te r M M P U X W D T P r e s c a le r D a ta M e m o ry P B C T im in g G e n e ra to r S T A T U S O S R V V C 1 E S D D S S P O R T B P B U S Y S C L K /4 X W D T O S C P A 0 ~ P A 5 P A 6 /T M R 0 P A 7 /T M R 1 P B 0 ~ P B 5 P B 6 /S C L P B 7 /S D A S h ifte r P C C O S C 2 P O R T A P A M U X A L U M P A 6 P A 7 P A C In s tr u c tio n D e c o d e r W D T P O R T C P C A C C P D C P O R T D P D P C 0 ~ P C 7 P D 0 ~ P D 7 Pin Assignment P C 3 1 2 8 P C 2 V D D 2 2 7 P C 0 V 3 3 O 3 2 6 P A 0 U S B D + /C L K 4 2 5 P A 1 2 4 P A 2 2 3 P A 3 5 U S B D -/D A T A 6 P B 0 7 P B 1 P B 2 P B 3 P B 4 P B 5 P B 6 /S C L P B 7 /S D A V S S 8 9 1 0 1 1 1 2 1 3 1 4 2 2 P C 4 2 1 P A 4 2 0 P A 5 1 9 P A 6 /T M R 0 1 8 P A 7 /T M R 1 1 7 O S C 1 1 6 O S C 2 1 5 R E S H T 8 2 K 9 5 E E /H T 8 2 K 9 5 A E 2 8 S O P -A Rev. 1.20 2 August 28, 2006 HT82K95EE/HT82K95AE Pin Description Pin Name PA0~PA5 PA6/TMR0 PA7/TMR1 I/O ROM Code Option Description Bidirectional 8-bit input/output port. Each bit can be configured as a wake-up input by ROM code option. The input or output mode is controlled by PAC (PA control register). Pull-high Pull-high resistor options: PA0~PA7 I/O Wake-up CMOS/NMOS/PMOS CMOS/NMOS/PMOS options: PA0~PA7 Wake up options: PA0~PA7 PA6 and PA7 are pin-shared with TMR0 and TMR1 input, respectively. PB0~PB5 PB6/SCL PB7/SDA I/O Pull-high Wake-up Bidirectional 8-bit input/output port. Software instructions determine the CMOS output or Schmitt trigger input with pull-high resistor (determined by pull-high options). Wake-up options: PB0~PB5 Falling edge wake-up options: PB6, PB7 PB6 is wire-bonded with SCL pad of the Data EEPROM PB7 is wire-bonded with SDA pad of the Data EEPROM PD0~PD7 I/O Pull-high Wake-up Bidirectional I/O lines. Software instructions determine the CMOS output or Schmitt trigger input with pull-high resistor (determined by pull-high options). Wake-up options: PD0~PD7 VSS ¾ ¾ I/O Pull-high Wake-up RES I ¾ Schmitt trigger reset input. Active low VDD ¾ ¾ Positive power supply V33O O ¾ 3.3V regulator output USBD+/CLK I/O ¾ USBD+ or PS2 CLK I/O line USB or PS2 function is controlled by software control register USBD-/DATA I/O ¾ USBD- or PS2 DATA I/O line USB or PS2 function is controlled by software control register OSC1 OSC2 I O ¾ OSC1, OSC2 are connected to a 6MHz or 12MHz Crystal/resonator (determined by software instructions) for the internal system clock. PC0~PC7 Negative power supply, ground Bidirectional I/O lines. Software instructions determine the CMOS output or Schmitt trigger input with pull-high resistor (determined by pull-high options). Wake-up options: PC0~PC7 Absolute Maximum Ratings Supply Voltage ...........................VSS-0.3V to VSS+6.0V Storage Temperature ............................-50°C to 125°C Input Voltage..............................VSS-0.3V to VDD+0.3V Operating Temperature...............................0°C to 70°C Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Rev. 1.20 3 August 28, 2006 HT82K95EE/HT82K95AE D.C. Characteristics Symbol VDD Ta=25°C Parameter Operating Voltage Test Conditions VDD ¾ Min. Typ. Max. Unit fSYS=6MHz 4.2 ¾ 5.5 V fSYS=12MHz 4.2 ¾ 5.5 V Conditions IDD1 Operating Current (6MHz Crystal) 5V No load, fSYS=6MHz ¾ 6.5 12 mA IDD2 Operating Current (12MHz Crystal) 5V No load, fSYS=12MHz ¾ 7.5 16 mA ISTB1 Standby Current (WDT Enabled) 5V No load, system HALT, USB suspend ¾ ¾ 250 mA ISTB2 Standby Current (WDT Disabled) 5V No load, system HALT, USB suspend ¾ ¾ 230 mA VIL1 Input Low Voltage for I/O Ports 5V ¾ 0 ¾ 0.8 V VIH1 Input High Voltage for I/O Ports 5V ¾ 2 ¾ 5 V 5V ¾ 0 ¾ 0.4VDD V 5V ¾ 0.9VDD ¾ VDD V VIL2 Input Low Voltage (RES) VIH2 Input High Voltage (RES) IOL1 I/O Port Sink Current for PA1~PA7, PB, PC, 5V PD VOL=3.4V 10 15 20 mA IOL2 I/O Port Sink Current for PA1~PA7, PB, PC, 5V PD VOL=0.4V 2 4 8 mA IOL3 I/O Port Sink Current for PA0 5V VOL=0.4V 7 10 13 mA IOH1 I/O Port Source Current for PA1~PA7, PB, 5V PC, PD VOH=3.4V -2 -4 -8 mA IOH2 I/O Port Source Current for PA0 5V VOH=3.4V -12 -18 -24 mA RPH Pull-high Resistance for PA, PB, PC, PD 5V ¾ 25 50 80 kW VLVR Low Voltage Reset ¾ ¾ 3 3.4 4.0 V VV33O 3.3V Regulator Output 5V IV33O=-5mA 3.0 3.3 3.6 V A.C. Characteristics Symbol Ta=25°C Parameter Test Conditions VDD Conditions Min. Typ. Max. Unit fSYS System Clock (Crystal OSC) 5V ¾ 6 ¾ 12 MHz fTIMER Timer I/P Frequency (TMR) 5V ¾ 0 ¾ 12 MHz 5V ¾ 15 31 70 ms tWDTOSC Watchdog Oscillator tWDT1 Watchdog Time-out Period (WDT OSC) 5V Without WDT prescaler 4 8 16 ms tWDT2 Watchdog Time-out Period (System Clock) ¾ Without WDT prescaler ¾ 1024 ¾ tSYS tRES External Reset Low Pulse Width ¾ ¾ 1 ¾ ¾ ms Wake-up from HALT ¾ 1024 ¾ tSYS tSST System Start-up Timer Period ¾ Power-up, Watchdog Time-out from normal ¾ 1024 ¾ tWDTOSC 1 ¾ ¾ ms tINT Rev. 1.20 Interrupt Pulse Width ¾ 4 ¾ August 28, 2006 HT82K95EE/HT82K95AE EEPROM A.C. Characteristics Symbol Ta=25°C Parameter Remark Standard Mode* VCC=5V±10% Min. Max. Min. Max. Unit fSK Clock Frequency ¾ ¾ 100 ¾ 400 kHz tHIGH Clock High Time ¾ 4000 ¾ 600 ¾ ns tLOW Clock Low Time ¾ 4700 ¾ 1200 ¾ ns tr SDA and SCL Rise Time Note ¾ 1000 ¾ 300 ns tf SDA and SCL Fall Time Note ¾ 300 ¾ 300 ns tHD:STA START Condition Hold Time After this period the first clock pulse is generated 4000 ¾ 600 ¾ ns tSU:STA START Condition Setup Time Only relevant for repeated START condition 4000 ¾ 600 ¾ ns tHD:DAT Data Input Hold Time ¾ 0 ¾ 0 ¾ ns tSU:DAT Data Input Setup Time ¾ 200 ¾ 100 ¾ ns tSU:STO STOP Condition Setup Time ¾ 4000 ¾ 600 ¾ ns tAA Output Valid from Clock ¾ ¾ 3500 ¾ 900 ns 4700 ¾ 1200 ¾ ns ¾ 100 ¾ 50 ns ¾ 5 ¾ 5 ms tBUF Bus Free Time Time in which the bus must be free before a new transmission can start tSP Input Filter Time Constant (SDA and SCL Pins) Noise suppression time tWR Write Cycle Time Note: ¾ These parameters are periodically sampled but not 100% tested * The standard mode means VCC=2.2V to 5.5V For relative timing, refer to timing diagrams Rev. 1.20 5 August 28, 2006 HT82K95EE/HT82K95AE Functional Description Execution Flow incremented by one. The program counter then points to the memory word containing the next instruction code. The system clock for the microcontroller is derived from a crystal. The system clock is internally divided into four non-overlapping clocks. One instruction cycle consists of four system clock cycles. When executing a jump instruction, conditional skip execution, loading PCL register, subroutine call or return from subroutine, initial reset, internal interrupt, external interrupt or return from interrupts, the PC manipulates the program transfer by loading the address corresponding to each instruction. Instruction fetching and execution are pipelined in such a way that a fetch takes an instruction cycle while decoding and execution takes the next instruction cycle. However, the pipelining scheme allows each instruction to be effectively executed in a cycle. If an instruction changes the program counter, two cycles are required to complete the instruction. The conditional skip is activated by instructions. Once the condition is met, the next instruction, fetched during the current instruction execution, is discarded and a dummy cycle replaces it to get the proper instruction. Otherwise proceed to the next instruction. Program Counter - PC The lower byte of the program counter (PCL) is a readable and writeable register (06H). Moving data into the PCL performs a short jump. The destination will be within the current program ROM page. The program counter (PC) controls the sequence in which the instructions stored in the program ROM are executed and its contents specify a full range of program memory. When a control transfer takes place, an additional dummy cycle is required. After accessing a program memory word to fetch an instruction code, the contents of the program counter are S y s te m C lo c k T 1 T 2 T 3 T 4 T 1 T 2 T 3 T 4 T 1 T 2 T 3 T 4 O S C 2 ( R C o n ly ) P C P C P C + 1 F e tc h IN S T (P C ) E x e c u te IN S T (P C -1 ) P C + 2 F e tc h IN S T (P C + 1 ) E x e c u te IN S T (P C ) F e tc h IN S T (P C + 2 ) E x e c u te IN S T (P C + 1 ) Execution Flow Mode Program Counter *11 *10 *9 *8 *7 *6 *5 *4 *3 *2 *1 *0 Initial reset 0 0 0 0 0 0 0 0 0 0 0 0 USB interrupt 0 0 0 0 0 0 0 0 0 1 0 0 Timer/Event Counter 0 overflow 0 0 0 0 0 0 0 0 1 0 0 0 Timer/Event Counter 1 overflow 0 0 0 0 0 0 0 0 1 1 0 0 Skip Program Counter+2 Loading PCL *11 *10 *9 *8 @7 @6 @5 @4 @3 @2 @1 @0 Jump, call branch #11 #10 #9 #8 #7 #6 #5 #4 #3 #2 #1 #0 Return from subroutine S11 S10 S9 S8 S7 S6 S5 S4 S3 S2 S1 S0 Program Counter Note: *11~*0: Program counter bits S11~S0: Stack register bits #11~#0: Instruction code bits Rev. 1.20 @7~@0: PCL bits 6 August 28, 2006 HT82K95EE/HT82K95AE · Location 00CH Program Memory - ROM This location is reserved for the Timer/Event Counter 1 interrupt service program. If a timer interrupt results from a Timer/Event Counter 1 overflow, and the interrupt is enabled and the stack is not full, the program begins execution at location 00CH. The program memory is used to store the program instructions which are to be executed. It also contains data, table, and interrupt entries, and is organized into 4096´15 bits, addressed by the program counter and table pointer. · Table location Certain locations in the program memory are reserved for special usage: Any location in the program memory can be used as look-up tables. There are three method to read the ROM data by two table read instructions: ²TABRDC² and ²TABRDL², transfer the contents of the lower-order byte to the specified data memory, and the higher-order byte to TBLH (08H). The three methods are shown as follows: · Location 000H This area is reserved for program initialization. After chip reset, the program always begins execution at location 000H. · Location 004H This area is reserved for the USB interrupt service program. If the USB interrupt is activated, the interrupt is enabled and the stack is not full, the program begins execution at location 004H. · Location 008H This area is reserved for the Timer/Event Counter 0 interrupt service program. If a timer interrupt results from a Timer/Event Counter 0 overflow, and if the interrupt is enabled and the stack is not full, the program begins execution at location 008H. 0 0 0 H U S B In te r r u p t S u b r o u tin e 0 0 8 H T im e r /E v e n t C o u n te r 0 In te r r u p t S u b r o u tin e 0 0 C H T im e r /E v e n t C o u n te r 1 In te r r u p t S u b r o u tin e P ro g ra m M e m o ry n 0 0 H L o o k - u p T a b le ( 2 5 6 w o r d s ) n F F H L o o k - u p T a b le ( 2 5 6 w o r d s ) F F F H 1 5 b its N o te : n ra n g e s fro m 0 to F Program Memory Instruction The instructions ²TABRDC [m]² (the current page, one page=256words), where the table locations is defined by TBLP (07H) in the current page. And the ROM code option TBHP is disabled (default). ¨ The instructions ²TABRDC [m]², where the table locations is defined by registers TBLP (07H) and TBHP (01FH). And the ROM code option TBHP is enabled. ¨ The instructions ²TABRDL [m]², where the table locations is defined by Registers TBLP (07H) in the last page (0F00H~0FFFH). Only the destination of the lower-order byte in the table is well-defined, the other bits of the table word are transferred to the lower portion of TBLH, and the remaining 1-bit words are read as ²0². The Table Higher-order byte register (TBLH) is read only. The table pointer (TBLP, TBHP) is a read/write register (07H, 1FH), which indicates the table location. Before accessing the table, the location must be placed in the TBLP and TBHP (If the OTP option TBHP is disabled, the value in TBHP has no effect). The TBLH is read only and cannot be restored. If the main routine and the ISR (Interrupt Service Routine) both employ the table read instruction, the contents of the TBLH in the main routine are likely to be changed by the table read instruction used in the ISR. Errors can occur. In other words, using the table read instruction in the main routine and the ISR simultaneously should be avoided. However, if the table read instruction has to be applied in both the main routine and the ISR, the interrupt should be disabled prior to the table read instruction. D e v ic e In itia liz a tio n P r o g r a m 0 0 4 H ¨ Table Location *11 *10 *9 *8 *7 *6 *5 *4 *3 *2 *1 *0 TABRDC [m] P11 P10 P9 P8 @7 @6 @5 @4 @3 @2 @1 @0 TABRDL [m] 1 1 1 1 @7 @6 @5 @4 @3 @2 @1 @0 Table Location Note: *11~*0: Table location bits @7~@0: Table pointer bits Rev. 1.20 P11~P8: Current program counter bits when TBHP is disabled TBHP register bit3~bit0 when TBHP is enabled 7 August 28, 2006 HT82K95EE/HT82K95AE B a n k 0 It will not be enabled until the TBLH has been backed up. All table related instructions require two cycles to complete the operation. These areas may function as normal program memory depending on the requirements. Once TBHP is enabled, the instruction ²TABRDC [m]² reads the ROM data as defined by TBLP and TBHP value. Otherwise, the ROM code option TBHP is disabled, the instruction ²TABRDC [m]² reads the ROM data as defined by TBLP and the current program counter bits. 0 0 H Stack Register - STACK 0 1 H M P 0 0 2 H In d ir e c t A d d r e s s in g R e g is te r 1 0 3 H M P 1 0 4 H B P 0 5 H A C C 0 6 H P C L 0 7 H T B L P 0 8 H T B L H 0 9 H W D T S 0 A H S T A T U S 0 B H IN T C 0 C H This is a special part of the memory which is used to save the contents of the program counter only. The stack is organized into 8 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 (SP) 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 chip reset, the SP will point to the top of the stack. If the stack is full and a non-masked 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. In a similar case, if the stack is full and a ²CALL² is subsequently executed, stack overflow occurs and the first entry will be lost (only the most recent 8 return addresses are stored). 0 D H T M R 0 0 E H T M R 0 C 0 F H T M R 1 H 1 0 H T M R 1 L 1 1 H T M R 1 C 1 2 H P A 1 3 H P A C 1 4 H P B 1 5 H P B C 1 6 H P C 1 7 H P C C 1 8 H P D 1 9 H P D C 1 A H U S C 1 B H U S R 1 C H S C C S p e c ia l P u r p o s e D a ta M e m o ry 1 D H 1 E H 1 F H 2 0 H T B H P G e n e ra l P u rp o s e D a ta M e m o ry (1 6 0 B y te s ) : U n u s e d , re a d a s "0 0 " B F H Bank 0 RAM Mapping Data Memory - RAM for Bank 0 (STATUS;0AH), interrupt control register (INTC;0BH), Watchdog Timer option setting register (WDTS;09H), I/O registers (PA;12H, PB;14H, PC;16H, PD;18H), I/O control registers (PAC;13H, PBC;15H, PCC;17H, PDC;19H). USB/PS2 status and control register (USC;1AH), USB endpoint interrupt status register (USR;1BH), system clock control register (SCC;1CH). The remaining space before the 20H is reserved for future expansion usage and reading these locations will get ²00H². The general purpose data memory, addressed from 20H to BFH, is used for data and control information under instruction commands. The data memory is designed with 190´8 bits. The data memory is divided into two functional groups: special function registers and general purpose data memory (160´8). Most are read/write, but some are read only. The special function registers include the indirect addressing registers (R0;00H, R1;02H), Bank register (BP, 04H), Timer/Event Counter 0 (TMR0;0DH), Timer/Event Counter 0 control register (TMR0C;0EH), Timer/Event Counter 1 higher order byte register (TMR1H;0FH), Timer/Event Counter 1 lower order byte register (TMR1L;10H), Timer/Event Counter 1 control register (TMR1C;11H), program counter lower-order byte register (PCL;06H), memory pointer registers (MP0;01H, MP1;03H), accumulator (ACC;05H), table pointer (TBLP;07H, TBHP;1FH), table higher-order byte register (TBLH;08H), status register Rev. 1.20 In d ir e c t A d d r e s s in g R e g is te r 0 All of the data memory areas can handle arithmetic, logic, increment, decrement and rotate operations directly. Except for some dedicated bits, each bit in the data memory can be set and reset by ²SET [m].i² and ²CLR [m].i². They are also indirectly accessible through memory pointer registers (MP0 or MP1). 8 August 28, 2006 HT82K95EE/HT82K95AE Data Memory - RAM for Bank 1 Accumulator The special function registers used in USB interface are located in RAM bank 1. In order to access the Bank1 register, only the Indirect addressing pointer MP1 can be used and the Bank register BP should be set to ²1². The mapping of RAM bank 1 is as shown. The accumulator is closely related to ALU operations. It is also mapped to location 05H of the data memory and can carry out immediate data operations. The data movement between two data memory locations must pass through the accumulator. Indirect Addressing Register Arithmetic and Logic Unit - ALU Location 00H and 02H are indirect addressing registers that are not physically implemented. Any read/write operation of [00H] ([02H]) will access data memory pointed to by MP0 (MP1). Reading location 00H (02H) itself indirectly will return the result 00H. Writing indirectly results in no operation. This circuit performs 8-bit arithmetic and logic operations. The ALU provides the following functions: The indirect addressing pointer (MP0) always point to Bank0 RAM addresses regardless of the value of the Bank Register (BP). · Branch decision (SZ, SNZ, SIZ, SDZ) · Arithmetic operations (ADD, ADC, SUB, SBC, DAA) · Logic operations (AND, OR, XOR, CPL) · Rotation (RL, RR, RLC, RRC) · Increment and Decrement (INC, DEC) The ALU not only saves the results of a data operation but also changes the status register. The indirect addressing pointer (MP1) can access Bank0 or Bank1 RAM data according to the value of BP which is set to ²0² or ²1² respectively. Status Register - STATUS This 8-bit register (0AH) contains the zero flag (Z), carry flag (C), auxiliary carry flag (AC), overflow flag (OV), power down flag (PDF), and watchdog time-out flag (TO). It also records the status information and controls the operation sequence. The memory pointer registers (MP0 and MP1) are 8-bit registers. 4 0 H 4 1 H P IP E _ C T R L 4 2 H A W R 4 3 H S T A L L 4 4 H P IP E 4 5 H S IE S 4 6 H M IS C 4 7 H E n d p t_ E N 4 8 H F IF O 0 4 9 H F IF O 1 4 A H F IF O 2 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 from those intended. The TO flag can be affected only by system power-up, a WDT time-out or executing the ²CLR WDT² or ²HALT² instruction. The PDF flag can be affected only by executing the ²HALT² or ²CLR WDT² instruction or during a system power-up. 4 B H 4 C H U n d e fin e d , r e s e r v e d fo r fu tu r e e x p a n s io n F F H The Z, OV, AC and C flags generally reflect the status of the latest operations. Bank 1 RAM Mapping Bit No. Label Function 0 C 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. 1 AC 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. 2 Z 3 OV OV is set if the 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. 4 PDF PDF is cleared by system power-up or executing the ²CLR WDT² instruction. PDF is set by executing the ²HALT² instruction. 5 TO TO is cleared by system power-up or executing the ²CLR WDT² or ²HALT² instruction. TO is set by a WDT time-out. 6~7 ¾ Unused bit, read as ²0² Z is set if the result of an arithmetic or logic operation is zero; otherwise Z is cleared. Status (0AH) Register Rev. 1.20 9 August 28, 2006 HT82K95EE/HT82K95AE In addition, on entering the interrupt sequence or executing the subroutine call, the status register will not be pushed onto the stack automatically. If the contents of the status are important and if the subroutine can corrupt the status register, precautions must be taken to save it properly. When the interrupt is enabled, the stack is not full and the external interrupt is active, a subroutine call to location 04H will occur. The interrupt request flag (USBF) and EMI bits will be cleared to disable other interrupts. When the PC Host access the FIFO of the HT82K95EE/ HT82K95AE, the corresponding request bit of the USR is set, and a USB interrupt is triggered. So user can easily decide which FIFO is accessed. When the interrupt has been served, the corresponding bit should be cleared by firmware. When the HT82K95EE/ HT82K95AE receives a USB Suspend signal from the Host PC, the suspend line (bit0 of the USC) of the HT82K95EE/HT82K95AE is set and a USB interrupt is also triggered. Interrupt The device provides an external interrupt and internal timer/event counter interrupts. The Interrupt Control Register (INTC;0BH) contains the interrupt control bits to set the enable/disable and the interrupt request flags. Once an interrupt subroutine is serviced, all the other interrupts will be blocked (by clearing the EMI bit). This scheme may prevent any further interrupt nesting. Other interrupt requests may occur during this interval but only the interrupt request flag is recorded. If a certain interrupt requires servicing within the service routine, the EMI bit and the corresponding bit of the INTC may be set 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 SP is decremented. If immediate service is desired, the stack must be prevented from becoming full. Also when the HT82K95EE/HT82K95AE receives a Resume signal from the Host PC, the resume line (bit3 of the USC) of HT82K95EE/HT82K95AE is set and a USB interrupt is triggered. Whenever a USB reset signal is detected, the USB interrupt is triggered. The internal Timer/Event Counter 0 interrupt is initialized by setting the Timer/Event Counter 0 interrupt request flag (; bit 5 of INTC), caused by a timer 0 overflow. When the interrupt is enabled, the stack is not full and the T0F bit is set, a subroutine call to location 08H will occur. The related interrupt request flag (T0F) will be reset and the EMI bit cleared to disable further interrupts. All these kinds of interrupts have a wake-up capability. As an interrupt is serviced, a control transfer occurs by pushing the program counter onto the stack, followed by a branch to a subroutine at specified location in the program memory. Only the program counter is pushed onto the stack. If the contents of the register or status register (STATUS) are altered by the interrupt service program which corrupts the desired control sequence, the contents should be saved in advance. The internal Timer/Even Counter 1 interrupt is initialized by setting the Timer/Event Counter 1 interrupt request flag (;bit 6 of INTC), caused by a timer 1 overflow. When the interrupt is enabled, the stack is not full and the T1F is set, a subroutine call to location 0CH will occur. The related interrupt request flag (T1F) will be reset and the EMI bit cleared to disable further interrupts. USB interrupts are triggered by the following USB events and the related interrupt request flag (USBF; bit 4 of the INTC) will be set. During the execution of an interrupt subroutine, other interrupt acknowledge signals are held until the ²RETI² instruction is executed or the EMI bit and the related interrupt control bit are set to ²1² (if the stack is not full). To return from the interrupt subroutine, ²RET² or ²RETI² may be invoked. RETI will set the EMI bit to enable an interrupt service, but RET will not. · The corresponding USB FIFO is accessed from the PC · The USB suspends signal from the PC · The USB resumes signal from the PC · The USB sends Reset signal Bit No. Label 0 EMI Controls the master (global) interrupt (1= enabled; 0= disabled) Function 1 EUI Controls the USB interrupt (1= enabled; 0= disabled) 2 ET0I Controls the Timer/Event Counter 0 interrupt (1= enabled; 0= disabled) 3 ET1I Controls the Timer/Event Counter 1 interrupt (1= enabled; 0= disabled) 4 USBF USB interrupt request flag (1= active; 0= inactive) 5 T0F 6 T1F 7 ¾ Internal Timer/Event Counter 0 request flag (1= active; 0= inactive) Internal Timer/Event Counter 1 request flag (1= active; 0= inactive) Unused bit, read as ²0² INTC (0BH) Register Rev. 1.20 10 August 28, 2006 HT82K95EE/HT82K95AE A crystal across OSC1 and OSC2 is needed to provide the feedback and phase shift required for the oscillator. No other external components are required. In stead of a crystal, a resonator can also be connected between OSC1 and OSC2 to get a frequency reference, but two external capacitors in OSC1 and OSC2 are required. Interrupts, occurring in the interval between the rising edges of two consecutive T2 pulses, will be serviced on the latter of the two T2 pulses, if the corresponding interrupts are enabled. In the case of simultaneous requests the following table shows the priority that is applied. These can be masked by resetting the EMI bit. No. Interrupt Source The WDT oscillator is a free running on-chip RC oscillator, and no external components are required. Even if the system enters the power down mode, the system clock is stopped, but the WDT oscillator still works within a period of approximately 31ms. The WDT oscillator can be disabled by ROM code option to conserve power. Priority Vector a USB interrupt 1 04H b Timer/Event Counter 0 overflow 2 08H c Timer/Event Counter 1 overflow 3 0CH The Timer/Event Counter 0/1 interrupt request flag (T0F/T1F), USB interrupt request flag (USBF), enable Timer/Event Counter 0/1 interrupt bit (ET0I/ET1I), enable USB interrupt bit (EUI) and enable master interrupt bit (EMI) constitute an interrupt control register (INTC) which is located at 0BH in the data memory. EMI, EUI, ETI are used to control the enabling/disabling of interrupts. These bits prevent the requested interrupt from being serviced. Once the interrupt request flags (TF, USBF) are set, they will remain in the INTC register until the interrupts are serviced or cleared by a software instruction. Watchdog Timer - WDT The WDT clock source is implemented by a dedicated RC oscillator (WDT oscillator), or instruction clock (system clock divided by 4), determines the ROM code option. This timer is designed to prevent a software malfunction or sequence from jumping to an unknown location with unpredictable results. The Watchdog Timer can be disabled by ROM code option. If the Watchdog Timer is disabled, all the executions related to the WDT result in no operation. Once the internal WDT oscillator (RC oscillator, normally with a period of 31ms at 5V) is selected, it is first divided by 256 (8-stage) to get the nominal time-out period of 8ms at 5V. This time-out period may vary with temperatures, VDD and process variations. By invoking the WDT prescaler, longer time-out periods can be realized. Writing data to WS2, WS1, WS0 (bits 2, 1, 0 of the WDTS) can give different time-out periods. If WS2, WS1, and WS0 are all equal to 1, the division ratio is up to 1:128, and the maximum time-out period is 1s at 5V. If the WDT oscillator is disabled, the WDT clock may still come from the instruction clock and operates in the same manner except that in the HALT state the WDT may stop counting and lose its protecting purpose. In this situation the logic can only be restarted by external logic. The high nibble and bit 3 of the WDTS are reserved for user¢s defined flags, which can only be set to ²10000² (WDTS.7~WDTS.3). It is recommended that a program does not use the ²CALL subroutine² within the interrupt subroutine. Interrupts often occur in an unpredictable manner or need to be serviced immediately in some applications. If only one stack is left and enabling the interrupt is not well controlled, the original control sequence will be damaged once the ²CALL² operates in the interrupt subroutine. Oscillator Configuration There is an oscillator circuits in the microcontroller. O S C 1 O S C 2 C r y s ta l O s c illa to r System Oscillator If the device operates in a noisy environment, using the on-chip 32kHz RC oscillator (WDT OSC) is strongly recommended, since the HALT will stop the system clock. This oscillator is designed for system clocks. The HALT mode stops the system oscillator and ignores an external signal to conserve power. S y s te m C lo c k /4 W D T O S C R O M C o d e O p tio n S e le c t W D T P r e s c a le r 8 - b it C o u n te r 7 - b it C o u n te r 8 -to -1 M U X W S 0 ~ W S 2 W D T T im e - o u t Watchdog Timer Rev. 1.20 11 August 28, 2006 HT82K95EE/HT82K95AE WS2 WS1 WS0 Division Ratio 0 0 0 1:1 0 0 1 1:2 0 1 0 1:4 0 1 1 1:8 1 0 0 1:16 1 0 1 1:32 1 1 0 1:64 1 1 1 1:128 cuting the ²HALT² instruction. The TO flag is set if the WDT time-out occurs, and causes a wake-up that only resets the Program Counter and SP, the others remain in their original status. The I/O ports wake-up and interrupt methods can be considered as a continuation of normal execution. Each bit in the Port A can be independently selected to wake up the device by option. PB, PC and PD can also be selected to wake up the device by option. Upon awakening from an I/O port stimulus, the program will resume execution of the next instruction. If it awakens from an interrupt, two sequence may occur. If the related interrupt is disabled or the interrupt is enabled but the stack is full, the program will resume execution at the next instruction. If the interrupt is enabled and the stack is not full, the regular interrupt response takes place. If an interrupt request flag is set to ²1² before entering the HALT mode, the wake-up function of the related interrupt will be disabled. Once a wake-up event occurs, it takes 1024 tSYS (system clock period) to resume normal operation. In other words, a dummy period will be inserted after a wake-up. If the wake-up results from an interrupt acknowledge signal, the actual interrupt subroutine execution will be delayed by one or more cycles. If the wake up results in the next instruction execution, this will be executed immediately after the dummy period is completed. WDTS (09H) Register The WDT overflow under normal operation will initialize a ²chip reset² and set the status bit ²TO². But in the HALT mode, the overflow will initialize a ²warm reset² and only the Program Counter and SP are reset to zero. To clear the contents of the WDT (including the WDT prescaler), three methods are employed; external reset (a low level to RES), software instruction and a ²HALT² instruction. The software instruction include ²CLR WDT² and the other set - ²CLR WDT1² and ²CLR WDT2². Of these two types of instruction, only one can be active depending on the ROM code option - ²CLR WDT times selection option². If the ²CLR WDT² is selected (i.e. CLRWDT times equal one), any execution of the ²CLR WDT² instruction will clear the WDT. In the case wherein ²CLR WDT1² and ²CLR WDT2² are chosen (i.e. CLRWDT times is equal to two), these two instructions must be executed to clear the WDT, otherwise, the WDT may reset the chip as a result of time-out. To minimize power consumption, all the I/O pins should be carefully managed before entering the HALT status. Reset There are three ways in which a reset can occur: · RES reset during normal operation · RES reset during HALT · WDT time-out reset during normal operation Power Down Operation - HALT The WDT time-out during HALT is different from other chip reset conditions, since it can perform a ²warm re set² that resets only the Program Counter and SP, leaving the other circuits in their original state. Some registers remain unchanged during other reset conditions. Most registers are reset to the ²initial condition² when the reset conditions are met. By examining the PDF and TO flags, the program can distinguish between different ²chip resets². The HALT mode is initialized by the ²HALT² instruction and results in the following: · The system oscillator will be turned off but the WDT oscillator remains running (if the WDT oscillator is selected). · The contents of the on-chip RAM and registers remain unchanged. · WDT and WDT prescaler will be cleared and re- counted again (if the WDT clock is from the WDT oscillator). TO PDF · All of the I/O ports maintain their original status. · The PDF flag is set and the TO flag is cleared. The system can leave the HALT mode by means of an external reset, an interrupt, an external falling edge signal on I/O ports or a WDT overflow. An external reset causes a device initialization and the WDT overflow performs a ²warm reset². After the TO and PDF flags are examined, the cause for chip reset can be determined. The PDF flag is cleared by a system power-up or executing the ²CLR WDT² instruction and is set when exe- Rev. 1.20 RESET Conditions 0 0 RES reset during power-up u u RES reset during normal operation 0 1 RES wake-up HALT 1 u WDT time-out during normal operation 1 1 WDT wake-up HALT Note: ²u² stands for ²unchanged² To guarantee that the system oscillator is started and stabilized, the SST (System Start-up Timer) provides an 12 August 28, 2006 HT82K95EE/HT82K95AE extra delay of 1024 system clock pulses when the system resets (power-up, WDT time-out or RES reset) or when the system awakes from the HALT state. H A L T When a system reset occurs, an SST delay is added during the reset period. Any wake up from HALT will enable the SST delay. R E S W a rm W D T tS S T S y s te m S S T T im e - o u t C h ip C o ld R e s e t S S T 1 0 - b it R ip p le C o u n te r O S C 1 V D D R E S R e s e t R e s e t Reset Configuration R e s e t The functional unit chip reset status are shown below. Reset Timing Chart V D D R E S Program Counter 000H Interrupt Disable Prescaler Clear WDT Clear. After master reset, WDT begins counting Timer/Event Counter Off Reset Circuit Input/Output Ports Input mode Stack Pointer Points to the top of the stack The status of the registers are summarized in the following table. Reset (Power On) WDT Time-out (Normal Operation) RES Reset (Normal Operation) RES Reset (HALT) WDT Time-Out (HALT)* USB-Reset (Normal) USB-Reset (HALT) TMR0 xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu TMR0C 00-0 1000 00-0 1000 00-0 1000 00-0 1000 uu-u uuuu 00-0 1000 00-0 1000 TMR1H xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu TMR1L xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu TMR1C 00-0 1--- 00-0 1--- 00-0 1--- 00-0 1--- uu-u u--- 00-0 1--- 00-0 1--- Program Counter 000H 000H 000H 000H 000H 000H 000H MP0 xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu MP1 xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu ACC xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu TBLP xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu TBLH -xxx xxxx -uuu uuuu -uuu uuuu -uuu uuuu -uuu uuuu -uuu uuuu -uuu uuuu STATUS --00 xxxx --1u uuuu --uu uuuu --01 uuuu --11 uuuu --uu uuuu --01 uuuu INTC -000 0000 -000 0000 -000 0000 -000 0000 -uuu uuuu -000 0000 -000 0000 WDTS 1000 0111 1000 0111 1000 0111 1000 0111 uuuu uuuu 1000 0111 1000 0111 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 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 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 PD 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu 1111 1111 1111 1111 Register Rev. 1.20 13 August 28, 2006 HT82K95EE/HT82K95AE Reset (Power On) WDT Time-out (Normal Operation) RES Reset (Normal Operation) RES Reset (HALT) WDT Time-Out (HALT)* USB-Reset (Normal) USB-Reset (HALT) PDC 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu 1111 1111 1111 1111 PIPE_CTRL 0000 0111 uuuu uuuu 0000 0111 0000 0111 uuuu uuuu 0000 0111 0000 0111 AWR 0000 0000 uuuu uuuu 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 PIPE 0000 0000 uuuu uuuu 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 STALL 0000 0111 uuuu uuuu 0000 0111 0000 0111 uuuu uuuu 0000 0111 0000 0111 SIES 0000 0000 uuuu uuuu 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 MISC 0000 0000 uuuu uuuu 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000 Endpt_EN 0000 0111 uuuu uuuu 0000 0111 0000 0111 uuuu uuuu 0000 0111 0000 0111 FIFO0 xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu 0000 0000 0000 0000 FIFO1 xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu 0000 0000 0000 0000 FIFO2 xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu 0000 0000 0000 0000 USC 11xx 0000 uuxx uuuu 11xx 0000 11xx 0000 uuxx uuuu uu00 0u00 uu00 0u00 USR 0100 0000 uuuu uuuu 0100 0000 0100 0000 uuuu uuuu u1uu 0000 u1uu 0000 SCC 0000 0000 uuuu uuuu 0000 0000 0000 0000 uuuu uuuu 0uu0 u000 0uu0 u000 Register Note: ²*² stands for ²warm reset² ²u² stands for ²unchanged² ²x² stands for ²unknown² Timer/Event Counter Two timer/event counters (TMR0, TMR1) are implemented in the microcontroller. The Timer/Event Counter 0 contains an 8-bit programmable count-up counter and the clock may comes from an external source or from fSYS/4. The Timer/Event Counter 1 contains an 16-bit programmable count-up counter and the clock may come from an external source or from the system clock divided by 4. Bit No. Label 0~2, 5 ¾ Unused bit, read as ²0² Function 3 TE To define the TMR0 active edge of Timer/Event Counter 0 (0=active on low to high; 1=active on high to low) 4 TON To enable/disable timer 0 counting (0=disabled; 1=enabled) 6 7 TM0 TM1 To define the operating mode 01=Event count mode (external clock) 10=Timer mode (internal clock) 11=Pulse width measurement mode 00=Unused TMR0C (0EH) Register Bit No. Label 0~2, 5 ¾ Unused bit, read as ²0² Function 3 TE To define the TMR1 active edge of Timer/Event Counter 1 (0=active on low to high; 1=active on high to low) 4 TON To enable/disable timer 1 counting (0=disabled; 1=enabled) 6 7 TM0 TM1 To define the operating mode 01=Event count mode (external clock) 10=Timer mode (internal clock) 11=Pulse width measurement mode 00=Unused TMR1C (11H) Register Rev. 1.20 14 August 28, 2006 HT82K95EE/HT82K95AE fS Y S D a ta B u s /4 T M 1 T M 0 T M R 0 T im e r /E v e n t C o u n te r 0 P r e lo a d R e g is te r R e lo a d T E T im e r /E v e n t C o u n te r 0 P u ls e W id th M e a s u re m e n t M o d e C o n tro l T M 1 T M 0 T O N O v e r flo w to In te rru p t Timer/Event Counter 0 D a ta B u s fS Y S /4 T M 1 T M 0 T M R 1 1 6 B its T im e r /E v e n t C o u n te r P r e lo a d R e g is te r R e lo a d T E T M 1 T M 0 T O N L o w B y te B u ffe r 1 6 B its T im e r /E v e n t C o u n te r (T M R 1 H /T M R 1 L ) P u ls e W id th M e a s u re m e n t M o d e C o n tro l O v e r flo w to In te rru p t Timer/Event Counter 1 The TM0, TM1 bits define the operating mode. The event count mode is used to count external events, which means the clock source comes from an external (TMR0/TMR1) pin. The timer mode functions as a normal timer with the clock source coming from the fSYS/4 (Timer0/Timer1). The pulse width measurement mode can be used to count the high or low level duration of the external signal (TMR0/TMR1). The counting is based on the fSYS/4 (Timer0/Timer1). Using the internal clock source, there is only 1 reference time-base for Timer/Event Counter 0. The internal clock source is coming from fSYS/4. The external clock input allows the user to count external events, measure time intervals or pulse widths. Using the internal clock source, there is only 1 reference time-base for Timer/Event Counter 1. The internal clock source is coming from fSYS/4. The external clock input allows the user to count external events, measure time intervals or pulse widths. In the event count or timer mode, once the Timer/Event Counter 0/1 starts counting, it will count from the current contents in the Timer/Event Counter 0/1 to FFH or FFFFH. Once overflow occurs, the counter is reloaded from the Timer/Event Counter 0/1 preload register and generates the interrupt request flag (T0F/T1F; bit 5/6 of INTC) at the same time. There are 2 registers related to the Timer/Event Counter 0; TMR0 ([0DH]), TMR0C ([0EH]). Two physical registers are mapped to TMR0 location; writing TMR0 makes the starting value be placed in the Timer/Event Counter 0 preload register and reading TMR0 gets the contents of the Timer/Event Counter 0. The TMR0C is a timer/ event counter control register, which defines some options. In the pulse width measurement mode with the TON and TE bits equal to one, once the TMR0/TMR1 has received a transient from low to high (or high to low if the TE bits is ²0²) it will start counting until the TMR0/TMR1 returns to the original level and resets the TON. The measured result will remain in the Timer/Event Counter 0/1 even if the activated transient occurs again. In other words, only one cycle measurement can be done. Until setting the TON, the cycle measurement will function again as long as it receives further transient pulse. Note that, in this operating mode, the Timer/Event Counter 0/1 starts counting not according to the logic level but according to the transient edges. In the case of counter overflows, the Counter 0/1 is reloaded from the Timer/Event Counter 0/1 preload register and issues the interrupt request just like the other two modes. To enable the counting operation, the timer ON bit (TON; bit 4 There are 3 registers related to Timer/Event Counter 1; TMR1H (0FH), TMR1L (10H), TMR1C (11H). Writing TMR1L will only put the written data to an internal lower-order byte buffer (8 bits) and writing TMR1H will transfer the specified data and the contents of the lower-order byte buffer to TMR1H and TMR1L preload registers, respectively. The Timer/Event Counter 1 preload register is changed by each writing TMR1H operations. Reading TMR1H will latch the contents of TMR1H and TMR1L counters to the destination and the lower-order byte buffer, respectively. Reading the TMR1L will read the contents of the lower-order byte buffer. The TMR1C is the Timer/Event Counter 1 control register, which defines the operating mode, counting enable or disable and active edge. Rev. 1.20 15 August 28, 2006 HT82K95EE/HT82K95AE structures can be reconfigured dynamically under software control. To function as an input, the corresponding latch of the control register must write a ²1². The input source also depends on the control register. If the control register bit is ²1², the input will read the pad state. If the control register bit is ²0², the contents of the latches will move to the internal bus. The latter is possible in the ²read-modify-write² instruction. For output function, CMOS/NMOS/PMOS configurations can be selected (NMOS and PMOS are available for PA only). These control registers are mapped to locations 13H, 15H, 17H and 19H. of TMR0C/TMR1C) should be set to 1. In the pulse width measurement mode, the TON will be cleared automatically after the measurement cycle is completed. But in the other two modes the TON can only be reset by instructions. The overflow of the Timer/Event Counter 0/1 is one of the wake-up sources. No matter what the operation mode is, writing a 0 to ET0I/ET1I can disable the corresponding interrupt services. In the case of Timer/Event Counter 0/1 OFF condition, writing data to the Timer/Event Counter 0/1 preload register will also reload that data to the Timer/Event Counter 0/1. But if the Timer/Event Counter 0/1 is turned on, data written to it will only be kept in the Timer/Event Counter 0/1 preload register. The Timer/Event Counter 0/1 will still operate until overflow occurs (a Timer/Event Counter 0/1 reloading will occur at the same time). When the Timer/Event Counter 0/1 (reading TMR0/TMR1) is read, the clock will be blocked to avoid errors. As clock blocking may results in a counting error, this must be taken into consideration by the programmer. After a chip reset, these input/output lines remain at high levels or floating state (depending on the pull-high options). Each bit of these input/output latches can be set or cleared by ²SET [m].i² and ²CLR [m].i² (m=12H, 14H, 16H or 18H) instructions. Some instructions first input data and then follow the output operations. For example, ²SET [m].i², ²CLR [m].i², ²CPL [m]², ²CPLA [m]² read the entire port states into the CPU, execute the defined operations (bit-operation), and then write the results back to the latches or the accumulator. Input/Output Ports There are 32 bidirectional input/output lines in the microcontroller, labeled from PA to PD, which are mapped to the data memory of [12H], [14H], [16H] and [18H] respectively. All of these I/O ports can be used for input and output operations. For input operation, these ports are non-latching, that is, the inputs must be ready at the T2 rising edge of instruction ²MOV A,[m]² (m=12H, 14H, 16H or 18H). For output operation, all the data is latched and remains unchanged until the output latch is rewritten. Each line of all the I/O ports have the capability of waking up the device. There are pull-high (PA only) options available for I/O lines. Once the pull-high option of an I/O line is selected, the I/O line have pull-high resistor. Otherwise, the pull-high resistor is absent. It should be noted that a non-pull-high I/O line operating in input mode will cause a floating state. Each I/O line has its own control register (PAC, PBC, PCC, PDC) to control the input/output configuration. With this control register, CMOS/NMOS/PMOS output or Schmitt trigger input with or without pull-high resistor It is recommended that unused or not bonded out I/O lines should be set as output pins by software instruction to avoid consuming power under input floating state. V D a ta B u s W r ite C o n tr o l R e g is te r C o n tr o l B it Q D D D P u ll- h ig h Q C K S P A P A P A P B P B P B P C P D C h ip R e s e t R e a d C o n tr o l R e g is te r W r ite D a ta R e g is te r P A O u tp u t C o n fig u r a tio n R e a d D a ta R e g is te r W a k e -u p fo r a n y I/O D a ta B it Q D C K S 0 ~ 6 /T 7 /T 0 ~ 6 /S 7 /S 0 ~ 0 ~ P A M M P B C D P C P D L 5 R 0 R 1 5 A 7 7 Q M P u ll- lo w U X P o rt W a k e - u p O p tio n fo r a n y I/O P A 7 /T M R P o rt Input/Output Ports Rev. 1.20 16 August 28, 2006 HT82K95EE/HT82K95AE Low Voltage Reset - LVR The relationship between VDD and VLVR is shown below. The microcontroller contains a low voltage reset circuit in order to monitor the supply voltage of the device. 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. V D D 5 .5 V O P R 5 .5 V V The LVR includes the following specifications: L V R 3 .3 V · For a valid LVR signal, a low voltage i.e. a voltage in 3 .0 V the range between 0.9V~VLVR must exist for greater than 1ms. If the low voltage state does not exceed 1ms, the LVR will ignore it and do not perform a reset function. · The LVR uses the ²OR² function with the external Note: RES signal to perform chip reset. V V 0 .9 V VOPR is the voltage range for proper chip operation at 4MHz system clock. D D 5 .5 V V L V R L V R D e te c t V o lta g e 0 .9 V 0 V R e s e t S ig n a l N o r m a l O p e r a tio n R e s e t R e s e t *1 *2 Low Voltage Reset Note: *1. To make sure that the system oscillator has stabilized, the SST provides an extra delay of 1024 system clock pulses before entering the normal operation. *2. Since low voltage has to be maintained for over 1ms in its original state, therefore there¢s a 1ms delay before entering the reset mode Rev. 1.20 17 August 28, 2006 HT82K95EE/HT82K95AE Data EEPROM Functional Description · Serial clock (SCL) Device Addressing The SCL input is used for positive edge clock data into each EEPROM device and negative edge clock data out of each device. The 1K EEPROM devices all require an 8-bit device address word following a start condition to enable the chip for a read or write operation. The device address word consist of a mandatory one, zero sequence for the first four most significant bits (refer to the diagram showing the Device Address). This is common to all the EEPROM device. · Serial data (SDA) The SDA pin is bidirectional for serial data transfer. The pin is open-drain driven and may be wired-OR with any number of other open-drain or open collector devices. The next three bits are the fixed to be ²0². The 8th bit of device address is the read/write operation select bit. A read operation is initiated if this bit is high and a write operation is initiated if this bit is low. Memory Organization · 1K Serial EEPROM Internally organized with 128 8-bit words, the 1K requires an 8-bit data word address for random word addressing. If the comparison of the device address succeed the EEPROM will output a zero at ACK bit. If not, the chip will return to a standby state. Device Operations 1 · Clock and data transition Data transfer may be initiated only when the bus is not busy. During data transfer, the data line must remain stable whenever the clock line is high. Changes in data line while the clock line is high will be interpreted as a START or STOP condition. 0 1 0 0 0 0 R /W D e v ic e A d d r e s s Write Operations · Byte write A write operation requires an 8-bit data word address following the device address word and acknowledgment. Upon receipt of this address, the EEPROM will again respond with a zero and then clock in the first 8-bit data word. After receiving the 8-bit data word, the EEPROM will output a zero and the addressing device, such as a microcontroller, must terminate the write sequence with a stop condition. At this time the EEPROM enters an internally-timed write cycle to the non-volatile memory. All inputs are disabled during this write cycle and EEPROM will not respond until the write is completed (refer to Byte write timing). · Start condition A high-to-low transition of SDA with SCL high is a start condition which must precede any other command (refer to Start and Stop Definition Timing diagram). · Stop condition A low-to-high transition of SDA with SCL high is a stop condition. After a read sequence, the stop command will place the EEPROM in a standby power mode (refer to Start and Stop Definition Timing Diagram). · Acknowledge All addresses and data words are serially transmitted to and from the EEPROM in 8-bit words. The EEPROM sends a zero to acknowledge that it has received each word. This happens during the ninth clock cycle. · Acknowledge polling To maximise bus throughput, one technique is to allow the master to poll for an acknowledge signal after the start condition and the control byte for a write command have been sent. If the device is still busy implementing its write cycle, then no ACK will be returned. The master can send the next read/write command when the ACK signal has finally been received. D a ta a llo w e d to c h a n g e S D A S C L S ta rt c o n d itio n A d d re s s o r a c k n o w le d g e v a lid N o A C K s ta te S to p c o n d itio n D e v ic e a d d r e s s S D A W o rd a d d re s s D A T A S S ta rt P R /W A C K A C K A C K S to p Byte Write Timing Rev. 1.20 18 August 28, 2006 HT82K95EE/HT82K95AE first page. The address roll over during write from the last byte of the current page to the first byte of the same page. Once the device address with the read/write select bit set to one is clocked in and acknowledged by the EEPROM, the current address data word is serially clocked out. The microcontroller should respond a No ACK (High) signal and following stop condition (refer to Current read timing). S e n d W r ite C o m m a n d S e n d S to p C o n d itio n to In itia te W r ite C y c le S e n d S ta rt S e n d C o tr o ll B y te w ith R /W = 0 (A C K = 0 )? · Random read A random read requires a dummy byte write sequence to load in the data word address which is then clocked in and acknowledged by the EEPROM. The microcontroller must then generate another start condition. The microcontroller now initiates a current address read by sending a device address with the read/write select bit high. The EEPROM acknowledges the device address and serially clocks out the data word. The microcontroller should respond with a ²no ACK² signal (high) followed by a stop condition. (refer to Random read timing). N o Y e s N e x t O p e r a tio n Acknowledge Polling Flow · Read operations · Sequential read The data EEPROM supports three read operations, namely, current address read, random address read and sequential read. During read operation execution, the read/write select bit should be set to ²1². Sequential reads are initiated by either a current address read or a random address read. After the microcontroller receives a data word, it responds with an acknowledgment. As long as the EEPROM receives an acknowledgment, it will continue to increment the data word address and serially clock out sequential data words. When the memory address limit is reached, the data word address will roll over and the sequential read continues. The sequential read operation is terminated when the microcontroller responds with a ²no ACK² signal (high) followed by a stop condition. · Current address read The internal data word address counter maintains the last address accessed during the last read or write operation, incremented by one. This address stays valid between operations as long as the chip power is maintained. The address roll over during read from the last byte of the last memory page to the first byte of the D e v ic e a d d r e s s S D A D A T A S to p S P S ta rt A C K N o A C K Current Read Timing D e v ic e a d d r e s s W o rd a d d re s s S S S D A D A T A D e v ic e a d d r e s s S ta rt P A C K S ta rt A C K S to p A C K N o A C K Random Read Timing D e v ic e a d d r e s s S D A D A T A n D A T A n + 1 S S ta rt D A T A n + x S to p P A C K A C K N o A C K Sequential Read Timing Rev. 1.20 19 August 28, 2006 HT82K95EE/HT82K95AE Data EEPROM Timing Diagrams tf tr tL S C L tS S D A U :S tH T A tS tH IG H D O W :S T A tH D :D tS A T :D U A T tS U tB U F :S T O P tA S D A A V a lid O U T V a lid S C L S D A 8 th b it A C K W o rd n tW S to p C o n d itio n Note: R S ta rt C o n d itio n The write cycle time tWR is the time from a valid stop condition of a write sequence to the end of the valid start condition of sequential command. Suspend Wake-Up and Remote Wake-Up S U S P E N D If there is no signal on the USB bus for over 3ms, the HT82K95EE/HT82K95AE will go into suspend mode. The Suspend line (bit 0 of the USC) will be set to ²1² and a USB interrupt is triggered to indicate that the HT82K95EE/HT82K95AE should jump to the suspend state to meet the 500mA USB suspend current spec. U S B R e s u m e S ig n a l U S B _ IN T In order to meet the 500mA suspend current, the firmware should disable the USB clock by clearing the USBCKEN (bit3 of the SCC) to ²0². The suspend current is 400mA. The device with remote wake up function can wake up the USB Host by sending a wake-up pulse through RMWK (bit 1 of the USC). Once the USB Host receives a wake-up signal from the HT82K95EE/HT82K95AE, it will send a Resume signal to the device. The timing is as follows: User can further decrease the suspend current to 250mA by setting the SUSP2 (bit4 of the SCC). But if the SUSP2 is set, user should make sure not to enable the LVR OPT o p t i on, ot her w i s e t h e H T82K 9 5 E E / HT82K95AE will be reset. S U S P E N D M in . 1 U S B C L K When the resume signal is sent out by the host, the HT82K95EE/HT82K95AE will wake-up the MCU by USB interrupt and the Resume line (bit 3 of the USC) is set. In order to make the HT82K95EE/HT82K95AE function properly, the firmware must set the USBCKEN (bit 3 of the SCC) to ²1² and clear the SUSP2 (bit4 of the SCC). Since the Resume signal will be cleared before the Idle signal is sent out by the host, the Suspend line (bit 0 of the USC) will be set to ²0². So when the MCU is detecting the Suspend line (bit0 of USC), the Resume line should be remembered and taken into consideration. R M W K U S B R e s u m e S ig n a l M in .2 .5 m s U S B _ IN T After finishing the resume signal, the suspend line will go inactive and a USB interrupt is triggered. The following is the timing diagram. Rev. 1.20 20 August 28, 2006 HT82K95EE/HT82K95AE To Configure the HT82K95EE/HT82K95AE as PS2 Device The HT82K95EE/HT82K95AE can be configured as a USB interface or PS2 interface device, by configuring the SPS2 (bit 4 of USR) and SUSB (bit 5 of the USR). If SPS2=1, and SUSB=0, the HT82K95EE/HT82K95AE is configured as a PS2 interface, pin USBD- is configured as a PS2 Data pin and USBD+ is configured as a PS2 Clk pin. User can easily read or write to the PS2 Data or PS2 Clk pin by accessing the corresponding bit PS2DAI (bit 4 of the USC), PS2CKI (bit 5 of the USC), PS2DAO (bit 6 of the USC) and S2CKO (bit 7 of the USC) respectively. User should make sure that in order to read the data properly, the corresponding output bit must be set to ²1². For example, if it is desired to read the PS2 Data by reading PS2DAI, the PS2DAO should set to ²1². Otherwise it is always read as ²0². If SPS2=0, and SUSB=1, the HT82K95EE/HT82K95AE is configured as a USB interface. Both the USBD- and USBD+ is driven by the SIE of the HT82K95EE/ HT82K95AE. User can only write or read the USB data through the corresponding FIFO. Both SPS2 and SUSB default is ²0². USB Interface There are ten registers, including PIPE_CTRL (41H in bank 1), AWR (address + remote wake-up 42H in bank 1), STALL (43H in bank 1), PIPE (44H in bank 1), SIES (45H in bank 1), MISC (46H in bank 1), Endpt_EN (47H in bank 1), FIFO0 (48H in bank 1), FIFO1 (49H in bank 1), and FIFO2 (4AH in bank 1) used for the USB function. AWR register contains current address and a remote wake up function control bit. The initial value of AWR is ²00H². The address value extracted from the USB command is not to be loaded into this register until the SETUP stage is completed. Bit No. Label R/W Function 0 WKEN W Remote wake-up enable/disable 7~1 AD6~AD0 W USB device address AWR (42H) Register STALL and PIPE, PIPE_CTRL, Endpt_EN Registers PIPE register represents whether the endpoint corresponding is accessed by host or not. After ACT_EN signal being sent out, MCU can check which endpoint had been accessed. This register is set only after the time when host access the corresponding endpoint. STALL register shows whether the endpoint corresponding works or not. As soon as the endpoint work improperly, the bit corresponding must be set. PIPE_CTRL Register is used for configuring IN (Bit=1) or OUT (Bit=0)Pipe. The default is define IN pipe. Where Bit0 (DATA0) of the PIPE_CTRL Register is used to setting the data toggle of any endpoint (except endpoint0) using data toggles to the value DATA0. Once the user want the any endpoint (except endpoint0) using data toggles to the value DATA0. the user can output a LOW pulse to this bit. The LOW pulse period must at least 10 instruction cycle. Endpt_EN Register is used to enable or disable the corresponding endpoint (except endpoint 0) Enable Endpoint (Bit=1) or disable Endpoint (Bit=0) The bitmaps are list as follows : Register Name R/W Register Address Bit7~Bit3 Reserved Bit 2 Bit 1 Bit 0 Default Value PIPE_CTRL R/W 01000001B ¾ Pipe 2 Pipe 1 Pipe 0 00000111 STALL R/W 01000011B ¾ Pipe 2 Pipe 1 Pipe 0 00000111 R 01000100B ¾ Pipe 2 Pipe 1 Pipe 0 00000000 R/W 01000001B ¾ Pipe 2 Pipe 1 Pipe 0 00000111 PIPE Endpt_EN PIPE_CTRL (41H), STALL (43H), PIPE (44H) and Endpt_EN (47H) Registers Rev. 1.20 21 August 28, 2006 HT82K95EE/HT82K95AE The SIES Register is used to indicate the present signal state which the SIE receives and also defines whether the SIE has to change the device address automatically. Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Func. NMI EOT CRC_ERR NAK IN OUT F0_ERR Adr_set R/W R/W R R/W R R R/W R/W R/W 01000101B Reg_ Adr SIES (45H) Register Table Func. Name R/W Description Adr_ set R/W This bit is used to configure the SIE to automatically change the device address with the value of the Address+Remote_WakeUp Register (42H). When this bit is set to ²1² by F/W, the SIE will update the device address with the value of the Address+Remote_WakeUp Register (42H) after the PC Host has successfully read the data from the device by the IN operation. The SIE will clear the bit after updating the device address. Otherwise, when this bit is cleared to ²0², the SIE will update the device address immediately after an address is written to the Address+Remote_WakeUp Register (42H) Default 0 F0_Err R/W This bit is used to indicate that some errors have occurred when accessing the FIFO0. This bit is set by SIE and cleared by F/W. Default 0 Out R/W This bit is used to indicate that an OUT token (except for the OUT zero length) has been received. The F/W clear the bit after the OUT data has been read. This bit will also be cleared by the SIE after the next valid SETUP token is received. Default 0 IN R This bit is used to indicate that the current signal the USB is receiving from the PC Host is IN token. NAK R This bit is used to indicate that the SIE is transmitting NAK signal to the Host in response to the PC Host IN or OUT token. CRC_ERR R/W This bit is used to indicate there are CRCerror (bit=1). Firmware must do something to save the device and keep it in good condition. This bit is set by SIE and cleared by F/W. EOT R End of transaction flag, normal status is 1. If suspend=¢1¢ line & EOT=¢0¢ indicates that something is wrong in the USB Interface. Firmware in-charge must do something to save the device and keep it in good condition. R/W This bit is used to control whether the USB interrupt is output to the MCU in NAK response to the PC Host IN or OUT token. 1: has only USB interrupt, data is transmitted to the PC host or data is received from the PC Host 0: always has USB interrupt if the USB accesses FIFO0 Default 0 NMI SIES Function Table Rev. 1.20 22 August 28, 2006 HT82K95EE/HT82K95AE MISC register combines a command and status to control desired endpoint FIFO action and to show the status of the desired endpoint FIFO. The MISC will be cleared by USB reset signal. Bit No. Label 0 REQ R/W Function R/W After setting the other status of the desired one in the MISC, endpoint FIFO can be requested by setting this bit to ²1². After the job has been done, this bit has to be cleared to ²0². 1 TX R/W This bit defines the direction of data transferring between MCU and endpoint FIFO. When the TX is set to ²1², this means that the MCU wants to write data to the endpoint FIFO. After the job has been done, this bit has to be cleared to ²0² before terminating request to represent the end of transferring. For reading action, this bit has to be cleared to ²0² to represent that MCU wants to read data from the endpoint FIFO and has to be set to ²1² after the job is done. 2 CLEAR R/W Clear the requested endpoint FIFO, even if the endpoint FIFO is not ready. 4 3 SELP1 SELP0 R/W Defines which endpoint FIFO is selected, SELP1,SELP0: 00: endpoint FIFO0 01: endpoint FIFO1 10: endpoint FIFO2 11: reserved 5 SCMD R/W Used to show that the data in endpoint FIFO is a SETUP command. This bit has to be cleared by firmware. That is to say, even the MCU is busy, the device will not miss any SETUP commands from the host. 6 READY R Read only status bit, this bit is used to indicate that the desired endpoint FIFO is ready to work. 7 LEN0 R/W Used to indicate that a 0-sized packet is sent from a host to the MCU. This bit should be cleared by firmware. MISC (46H) Register The MCU can communicate with the endpoint FIFO by setting the corresponding registers, of which address is listed in the following table. After reading the current data, next data will show after 2ms, used to check the endpoint FIFO status and response to MISC register, if read/write action is still going on. Registers R/W Bank Address Bit7~Bit0 FIFO0 R/W 1 48H Data7~Data0 FIFO1 R/W 1 49H Data7~Data0 FIFO2 R/W 1 4AH Data7~Data0 There are some timing constrains and usages illustrated here. By setting the MISC register, MCU can perform reading, writing and clearing actions. There are some examples shown in the following table for endpoint FIFO reading, writing and clearing. Actions MISC Setting Flow and Status Read FIFO0 sequence 00H®01H®delay 2ms, check 41H®read* from FIFO0 register and check not ready (01H)®03H®02H Write FIFO1 sequence 0AH®0BH®delay 2ms, check 4BH®write* to FIFO1 register and check not ready (0BH)®09H®08H Check whether FIFO0 can be read or not 00H®01H®delay 2ms, check 41H (ready) or 01H (not ready)®00H Check whether FIFO1 can be written or not 0AH®0BH®delay 2ms, check 4BH (ready) or 0BH (not ready)®0AH Read 0-sized packet sequence form FIFO0 00H®01H®delay 2ms, check 81H®read once (01H)®03H®02H Write 0-sized packet sequence to FIFO1 0AH®0BH®delay 2ms, check 0BH®0FH®0DH®08H Note: *: There are 2ms existing between 2 reading action or between 2 writing action Rev. 1.20 23 August 28, 2006 HT82K95EE/HT82K95AE The definitions of the USB/PS2 status and control register (USC; 1AH) are as shown. Bit No. Label R/W Function 0 SUSP R Read only, USB suspend indication. When this bit is set to ²1² (set by SIE), it indicates the USB bus enters suspend mode. The USB interrupt is also triggered on any changes of this bit. 1 RMWK W USB remote wake up command. It is set by MCU to force the USB host leaving the suspend mode. When this bit is set to ²1², 2ms delay for clearing this bit to ²0² is needed to insure the RMWK command is accepted by SIE. R/W USB reset indication. This bit is set/cleared by USB SIE. This bit is used to detect which bus (PS2 or USB) is attached. When the URST is set to ²1², this indicates that a USB reset has occurred (the attached bus is USB) and a USB interrupt will be initialized. 2 URST 3 RESUME R USB resume indication. When the USB leaves the suspend mode, this bit is set to ²1² (set by SIE). This bit will appear 20ms waiting for the MCU to detect. When the RESUME is set by the SIE, an interrupt will be generated to wake-up the MCU. In order to detect the suspend state, the MCU should set the USBCKEN and clear SUSP2 (in SCC register) to enable the SIE detecting function. The RESUME will be cleared while the SUSP is going ²0². When the MCU is detecting the SUSP, the RESUME (wakes-up the MCU ) should be remembered and taken into consideration. 4 PS2DAI R Read only, USBD-/DATA input 5 PS2CKI R Read only, USBD+/CLK input 6 PS2DAO W Data for driving the USBD-/DATA pin when working under 3D PS2 mouse function. (Default=²1²) 7 PS2CKO W Data for driving the USBD+/CLK pin when working under 3D PS2 mouse function. (Default=²1²) USC (1AH) Register The USR (USB endpoint interrupt status register) register is used to indicate which endpoint is accessed and to select the serial bus (PS2 or USB). The endpoint request flags (EP0IF, EP1IF and EP2IF) are used to indicate which endpoints are accessed. If an endpoint is accessed, the related endpoint request flag will be set to ²1² 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 served, the endpoint request flag has to be cleared to ²0². Bit No. Label R/W Function 0 EP0IF R/W When this bit is set to ²1² (set by the SIE), it indicates the endpoint 0 is accessed and a USB interrupt will occur. When the interrupt has been served, this bit should be cleared by firmware. 1 EP1IF R/W When this bit is set to ²1² (set by the SIE), it indicates the endpoint 1 is accessed and a USB interrupt will occur. When the interrupt has been served, this bit should be cleared by firmware. 2 EP2IF R/W When this bit is set to ²1² (set by the SIE), it indicates the endpoint 2 is accessed and a USB interrupt will occur. When the interrupt has been served, this bit should be cleared by firmware. 3, 6 ¾ ¾ 4 SPS2 R/W The PS2 function is selected when this bit is set to ²1². (Default=²0²) 5 SUSB R/W The USB function is selected when this bit is set to ²1². (Default=²0²) 7 USB_flag R/W This flag is used to show the MCU is in USB mode. (Bit=1) This bit is R/W by FW and will be cleared to ²0² after power-on reset. (Default=²0²) Reserved USR (1BH) Register Rev. 1.20 24 August 28, 2006 HT82K95EE/HT82K95AE There is a system clock control register implemented to select the clock used in the MCU. This register consists of the USB clock control bit (USBCKEN), second suspend mode control bit (SUSP2) and system clock selection (SYSCLK). Bit No. Label R/W 2~0, 7 ¾ ¾ 3 Function Undefined, should be cleared to ²0² USB clock control bit. When this bit is set to ²1², it indicates that the USB clock is enabled. Otherwise, the USB clock is turned-off. (Default=²0²) USBCKEN R/W 4 SUSP2 R/W This bit is used for decreasing power consumption in suspend mode. In normal mode clean this bit=0 (Default=²0²) In HALT mode set this bit=1 for decreasing power consumption. 5 PS2_flag R/W This flag is used to show the MCU is under PS2 mode. (Bit=1) This bit is R/W by FW and will be cleared to ²0² after power-on reset. (Default=²0²) 6 SYSCLK R/W This bit is used to specify the system oscillator frequency used by the MCU. If a 6MHz crystal oscillator or resonator is used, this bit should be set to ²1². If a 12MHz crystal oscillator or resonator is used, this bit should be cleared to ²0² (default). SCC (1CH) Register Table High Byte Pointer for Current Table Read TBHP (Address 0X1F) Register TBHP (0X1F) Bits Labels Read/Write Option 3~0 PGC3~PGC0 R/W ¾ Functions Store current table read bit11~bit8 data Options The following table shows all kinds of option in the microcontroller. All of the options must be defined to ensure proper system functioning. No. Option 1 Chip lock bit (by bit) 2 PA0~PA7 pull-high resistor enabled or disabled (by bit) 3 PB0~PB7 pull-high resistor enabled or disabled (by nibble) 4 PC0~PC7 pull-high resistor enabled or disabled (by nibble) 5 PD0~PD7 pull-high resistor enabled or disabled (by nibble) 6 LVR enable or disable 7 WDT enable or disable 8 WDT clock source: fSYS/4 or WDTOSC 9 ²CLRWDT² instruction(s): 1 or 2 10 PA0~PA7 output structures: CMOS/NMOS open-drain/PMOS open-drain (by bit) 11 PA0~PA7 wake-up enabled or disabled (by bit) 12 PB0~PB7 wake-up enabled or disabled (by nibble) 13 PC0~PC7 wake-up enabled or disabled (by nibble) 14 PD0~PD7 wake-up enabled or disabled (by nibble) 15 TBHP enable or disable (default disable) Rev. 1.20 25 August 28, 2006 HT82K95EE/HT82K95AE Application Circuits Crystal or Ceramic Resonator for Multiple I/O Applications 5 W V D D U S B - 0 .1 m F U S B + * * 3 3 W 1 0 m F 1 0 0 k W P A 0 ~ P A 7 * V D D 0 .1 m F 1 M W *** P D 0 ~ P D 7 2 2 p F V S S 5 W ** * O S C 1 X 1 2 2 p F 1 0 k W 0 .1 m F * O S C 2 ** 0 .1 m F P B 0 ~ P B 7 P C 0 ~ P C 7 R E S 0 .1 m F 4 7 p F * 3 3 W U S B D -/D A T A 4 7 p F * * V S S * * * 4 7 p F 3 3 W U S B D + /C L K H T 8 2 K 9 5 E E /H T 8 2 K 9 5 A E Note: 1 .5 k W V 3 3 O * 4 7 p F The resistance and capacitance for reset circuit should be designed in such a way as to ensure that the VDD is stable and remains within a valid operating voltage range before bringing RES high. X1 can use 6MHz or 12MHz, X1 as close OSC1 & OSC2 as possible. Components with * are used for EMC issue. Components with ** are used for resonator only. Components with *** are used for 12MHz application. Rev. 1.20 26 August 28, 2006 HT82K95EE/HT82K95AE Instruction Set Summary Description Instruction Cycle 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 ACC 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 and result in data memory Decimal adjust ACC for addition with result in data memory 1 1(1) 1 1 1(1) 1 1 1(1) 1 1(1) 1(1) Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV Z,C,AC,OV C 1 1 1 1(1) 1(1) 1(1) 1 1 1 1(1) 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 1(1) 1 1(1) 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 1(1) 1 1(1) 1 1(1) 1 1(1) None None C C None None C C Move data memory to ACC Move ACC to data memory Move immediate data to ACC 1 1(1) 1 None None None Clear bit of data memory Set bit of data memory 1(1) 1(1) None None Mnemonic 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,[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] AND data memory to ACC OR data memory to ACC Exclusive-OR data memory to ACC AND ACC to data memory OR ACC to data memory Exclusive-OR ACC to data memory AND immediate data to ACC OR immediate data to ACC Exclusive-OR 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] Data Move MOV A,[m] MOV [m],A MOV A,x Bit Operation CLR [m].i SET [m].i Rev. 1.20 27 August 28, 2006 HT82K95EE/HT82K95AE Mnemonic Description Instruction Cycle Flag Affected 2 1(2) 1(2) 1(2) 1(2) 1(3) 1(3) 1(2) 1(2) 2 2 2 2 None None None None None None None None None None None None None 2(1) 2(1) 2(1) None None None 1 1(1) 1(1) 1 1 1 1(1) 1 1 None None None TO,PDF TO(4),PDF(4) TO(4),PDF(4) None None TO,PDF Branch 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 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 JMP addr SZ [m] SZA [m] SZ [m].i SNZ [m].i SIZ [m] SDZ [m] SIZA [m] SDZA [m] CALL addr RET RET A,x RETI Table Read TABRDC [m](5) Read ROM code (locate by TBLP and TBHP) to data memory and TBLH TABRDC [m](6) Read ROM code (current page) to data memory and TBLH Read ROM code (last page) to data memory and TBLH TABRDL [m] Miscellaneous NOP CLR [m] SET [m] CLR WDT CLR WDT1 CLR WDT2 SWAP [m] SWAPA [m] HALT Note: No operation Clear data memory Set data memory Clear Watchdog Timer Pre-clear Watchdog Timer Pre-clear Watchdog Timer Swap nibbles of data memory Swap nibbles of data memory with result in ACC Enter power down mode x: Immediate data m: Data memory address A: Accumulator i: 0~7 number of bits addr: Program memory address Ö: Flag is affected -: Flag is not affected (1) : If a loading to the PCL register occurs, the execution cycle of instructions will be delayed for one more cycle (four system clocks). (2) : If a skipping to the next instruction occurs, the execution cycle of instructions will be delayed for one more cycle (four system clocks). Otherwise the original instruction cycle is unchanged. (3) (1) : and (2) (4) : The flags may be affected by the execution status. If the Watchdog Timer is cleared by executing the ²CLR WDT1² or ²CLR WDT2² instruction, the TO and PDF are cleared. Otherwise the TO and PDF flags remain unchanged. (5) : ²ROM code TBHP option² is enabled (6) : ²ROM code TBHP option² is disabled Rev. 1.20 28 August 28, 2006 HT82K95EE/HT82K95AE Instruction Definition ADC A,[m] Add data memory and carry to the accumulator Description The contents of the specified data memory, accumulator and the carry flag are added simultaneously, leaving the result in the accumulator. Operation ACC ¬ ACC+[m]+C Affected flag(s) TO PDF OV Z AC C ¾ ¾ Ö Ö Ö Ö ADCM A,[m] Add the accumulator and carry to data memory Description The contents of the specified data memory, accumulator and the carry flag are added simultaneously, leaving the result in the specified data memory. Operation [m] ¬ ACC+[m]+C Affected flag(s) TO PDF OV Z AC C ¾ ¾ Ö Ö Ö Ö ADD A,[m] Add data memory to the accumulator Description The contents of the specified data memory and the accumulator are added. The result is stored in the accumulator. Operation ACC ¬ ACC+[m] Affected flag(s) TO PDF OV Z AC C ¾ ¾ Ö Ö Ö Ö ADD A,x Add immediate data to the accumulator Description The contents of the accumulator and the specified data are added, leaving the result in the accumulator. Operation ACC ¬ ACC+x Affected flag(s) TO PDF OV Z AC C ¾ ¾ Ö Ö Ö Ö ADDM A,[m] Add the accumulator to the data memory Description The contents of the specified data memory and the accumulator are added. The result is stored in the data memory. Operation [m] ¬ ACC+[m] Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ Ö Ö Ö Ö 29 August 28, 2006 HT82K95EE/HT82K95AE AND A,[m] Logical AND accumulator with data memory Description Data in the accumulator and the specified data memory perform a bitwise logical_AND operation. The result is stored in the accumulator. Operation ACC ¬ ACC ²AND² [m] Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ AND A,x Logical AND immediate data to the accumulator Description Data in the accumulator and the specified data perform a bitwise logical_AND operation. The result is stored in the accumulator. Operation ACC ¬ ACC ²AND² x Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ ANDM A,[m] Logical AND data memory with the accumulator Description Data in the specified data memory and the accumulator perform a bitwise logical_AND operation. The result is stored in the data memory. Operation [m] ¬ ACC ²AND² [m] Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ CALL addr Subroutine call Description The instruction unconditionally calls a subroutine located at the indicated address. The program counter increments once to obtain the address of the next instruction, and pushes this onto the stack. The indicated address is then loaded. Program execution continues with the instruction at this address. Operation Stack ¬ Program Counter+1 Program Counter ¬ addr Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ CLR [m] Clear data memory Description The contents of the specified data memory are cleared to 0. Operation [m] ¬ 00H Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ 30 August 28, 2006 HT82K95EE/HT82K95AE CLR [m].i Clear bit of data memory Description The bit i of the specified data memory is cleared to 0. Operation [m].i ¬ 0 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ CLR WDT Clear Watchdog Timer Description The WDT is cleared (clears the WDT). The power down bit (PDF) and time-out bit (TO) are cleared. Operation WDT ¬ 00H PDF and TO ¬ 0 Affected flag(s) TO PDF OV Z AC C 0 0 ¾ ¾ ¾ ¾ CLR WDT1 Preclear Watchdog Timer Description Together with CLR WDT2, clears the WDT. PDF and TO are also cleared. Only execution of this instruction without the other preclear instruction just sets the indicated flag which implies this instruction has been executed and the TO and PDF flags remain unchanged. Operation WDT ¬ 00H* PDF and TO ¬ 0* Affected flag(s) TO PDF OV Z AC C 0* 0* ¾ ¾ ¾ ¾ CLR WDT2 Preclear Watchdog Timer Description Together with CLR WDT1, clears the WDT. PDF and TO are also cleared. Only execution of this instruction without the other preclear instruction, sets the indicated flag which implies this instruction has been executed and the TO and PDF flags remain unchanged. Operation WDT ¬ 00H* PDF and TO ¬ 0* Affected flag(s) TO PDF OV Z AC C 0* 0* ¾ ¾ ¾ ¾ CPL [m] Complement data memory Description 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. Operation [m] ¬ [m] Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ 31 August 28, 2006 HT82K95EE/HT82K95AE CPLA [m] Complement data memory and place result in the accumulator Description 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. Operation ACC ¬ [m] Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ DAA [m] Decimal-Adjust accumulator for addition Description The accumulator value is adjusted to the BCD (Binary Coded Decimal) code. The accumulator is divided into two nibbles. Each nibble is adjusted to the BCD code and an internal carry (AC1) will be done if the low nibble of the accumulator is greater than 9. The BCD adjustment is done by adding 6 to the original value if the original value is greater than 9 or a carry (AC or C) is set; otherwise the original value remains unchanged. The result is stored in the data memory and only the carry flag (C) may be affected. Operation If ACC.3~ACC.0 >9 or AC=1 then [m].3~[m].0 ¬ (ACC.3~ACC.0)+6, AC1=AC else [m].3~[m].0 ¬ (ACC.3~ACC.0), AC1=0 and If ACC.7~ACC.4+AC1 >9 or C=1 then [m].7~[m].4 ¬ ACC.7~ACC.4+6+AC1,C=1 else [m].7~[m].4 ¬ ACC.7~ACC.4+AC1,C=C Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ Ö DEC [m] Decrement data memory Description Data in the specified data memory is decremented by 1. Operation [m] ¬ [m]-1 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ DECA [m] Decrement data memory and place result in the accumulator Description Data in the specified data memory is decremented by 1, leaving the result in the accumulator. The contents of the data memory remain unchanged. Operation ACC ¬ [m]-1 Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ 32 August 28, 2006 HT82K95EE/HT82K95AE HALT Enter power down mode Description This instruction stops program execution and turns off the system clock. The contents of the RAM and registers are retained. The WDT and prescaler are cleared. The power down bit (PDF) is set and the WDT time-out bit (TO) is cleared. Operation Program Counter ¬ Program Counter+1 PDF ¬ 1 TO ¬ 0 Affected flag(s) TO PDF OV Z AC C 0 1 ¾ ¾ ¾ ¾ INC [m] Increment data memory Description Data in the specified data memory is incremented by 1 Operation [m] ¬ [m]+1 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ INCA [m] Increment data memory and place result in the accumulator Description Data in the specified data memory is incremented by 1, leaving the result in the accumulator. The contents of the data memory remain unchanged. Operation ACC ¬ [m]+1 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ JMP addr Directly jump Description The program counter are replaced with the directly-specified address unconditionally, and control is passed to this destination. Operation Program Counter ¬addr Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ MOV A,[m] Move data memory to the accumulator Description The contents of the specified data memory are copied to the accumulator. Operation ACC ¬ [m] Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ 33 August 28, 2006 HT82K95EE/HT82K95AE MOV A,x Move immediate data to the accumulator Description The 8-bit data specified by the code is loaded into the accumulator. Operation ACC ¬ x Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ MOV [m],A Move the accumulator to data memory Description The contents of the accumulator are copied to the specified data memory (one of the data memories). Operation [m] ¬ACC Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ NOP No operation Description No operation is performed. Execution continues with the next instruction. Operation Program Counter ¬ Program Counter+1 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ OR A,[m] Logical OR accumulator with data memory Description Data in the accumulator and the specified data memory (one of the data memories) perform a bitwise logical_OR operation. The result is stored in the accumulator. Operation ACC ¬ ACC ²OR² [m] Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ OR A,x Logical OR immediate data to the accumulator Description Data in the accumulator and the specified data perform a bitwise logical_OR operation. The result is stored in the accumulator. Operation ACC ¬ ACC ²OR² x Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ ORM A,[m] Logical OR data memory with the accumulator Description Data in the data memory (one of the data memories) and the accumulator perform a bitwise logical_OR operation. The result is stored in the data memory. Operation [m] ¬ACC ²OR² [m] Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ 34 August 28, 2006 HT82K95EE/HT82K95AE RET Return from subroutine Description The program counter is restored from the stack. This is a 2-cycle instruction. Operation Program Counter ¬ Stack Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ RET A,x Return and place immediate data in the accumulator Description The program counter is restored from the stack and the accumulator loaded with the specified 8-bit immediate data. Operation Program Counter ¬ Stack ACC ¬ x Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ RETI Return from interrupt Description The program counter is restored from the stack, and interrupts are enabled by setting the EMI bit. EMI is the enable master (global) interrupt bit. Operation Program Counter ¬ Stack EMI ¬ 1 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ RL [m] Rotate data memory left Description The contents of the specified data memory are rotated 1 bit left with bit 7 rotated into bit 0. Operation [m].(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0~6) [m].0 ¬ [m].7 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ RLA [m] Rotate data memory left and place result in the accumulator Description Data in the specified data memory is rotated 1 bit left with bit 7 rotated into bit 0, leaving the rotated result in the accumulator. The contents of the data memory remain unchanged. Operation ACC.(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0~6) ACC.0 ¬ [m].7 Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ 35 August 28, 2006 HT82K95EE/HT82K95AE RLC [m] Rotate data memory left through carry Description The contents of the specified data memory and the carry flag are rotated 1 bit left. Bit 7 replaces the carry bit; the original carry flag is rotated into the bit 0 position. Operation [m].(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0~6) [m].0 ¬ C C ¬ [m].7 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ Ö RLCA [m] Rotate left through carry and place result in the accumulator Description Data in the specified data memory and the carry flag are rotated 1 bit left. Bit 7 replaces the carry bit and the original carry flag is rotated into bit 0 position. The rotated result is stored in the accumulator but the contents of the data memory remain unchanged. Operation ACC.(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0~6) ACC.0 ¬ C C ¬ [m].7 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ Ö RR [m] Rotate data memory right Description The contents of the specified data memory are rotated 1 bit right with bit 0 rotated to bit 7. Operation [m].i ¬ [m].(i+1); [m].i:bit i of the data memory (i=0~6) [m].7 ¬ [m].0 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ RRA [m] Rotate right and place result in the accumulator Description Data in the specified data memory is rotated 1 bit right with bit 0 rotated into bit 7, leaving the rotated result in the accumulator. The contents of the data memory remain unchanged. Operation ACC.(i) ¬ [m].(i+1); [m].i:bit i of the data memory (i=0~6) ACC.7 ¬ [m].0 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ RRC [m] Rotate data memory right through carry Description The contents of the specified data memory and the carry flag are together rotated 1 bit right. Bit 0 replaces the carry bit; the original carry flag is rotated into the bit 7 position. Operation [m].i ¬ [m].(i+1); [m].i:bit i of the data memory (i=0~6) [m].7 ¬ C C ¬ [m].0 Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ Ö 36 August 28, 2006 HT82K95EE/HT82K95AE RRCA [m] Rotate right through carry and place result in the accumulator Description Data of the specified data memory and the carry flag are rotated 1 bit right. Bit 0 replaces the carry bit and the original carry flag is rotated into the bit 7 position. The rotated result is stored in the accumulator. The contents of the data memory remain unchanged. Operation ACC.i ¬ [m].(i+1); [m].i:bit i of the data memory (i=0~6) ACC.7 ¬ C C ¬ [m].0 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ Ö SBC A,[m] Subtract data memory and carry from the accumulator Description The contents of the specified data memory and the complement of the carry flag are subtracted from the accumulator, leaving the result in the accumulator. Operation ACC ¬ ACC+[m]+C Affected flag(s) TO PDF OV Z AC C ¾ ¾ Ö Ö Ö Ö SBCM A,[m] Subtract data memory and carry from the accumulator Description The contents of the specified data memory and the complement of the carry flag are subtracted from the accumulator, leaving the result in the data memory. Operation [m] ¬ ACC+[m]+C Affected flag(s) TO PDF OV Z AC C ¾ ¾ Ö Ö Ö Ö SDZ [m] Skip if decrement data memory is 0 Description The contents of the specified data memory are decremented by 1. If the result is 0, the next instruction is skipped. If the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Operation Skip if ([m]-1)=0, [m] ¬ ([m]-1) Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ SDZA [m] Decrement data memory and place result in ACC, skip if 0 Description The contents of the specified data memory are decremented by 1. If the result is 0, the next instruction is skipped. The result is stored in the accumulator but the data memory remains unchanged. If the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Operation Skip if ([m]-1)=0, ACC ¬ ([m]-1) Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ 37 August 28, 2006 HT82K95EE/HT82K95AE SET [m] Set data memory Description Each bit of the specified data memory is set to 1. Operation [m] ¬ FFH Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ SET [m]. i Set bit of data memory Description Bit i of the specified data memory is set to 1. Operation [m].i ¬ 1 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ SIZ [m] Skip if increment data memory is 0 Description The contents of the specified data memory are incremented by 1. If the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Operation Skip if ([m]+1)=0, [m] ¬ ([m]+1) Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ SIZA [m] Increment data memory and place result in ACC, skip if 0 Description The contents of the specified data memory are incremented by 1. If the result is 0, the next instruction is skipped and the result is stored in the accumulator. The data memory remains unchanged. If the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Operation Skip if ([m]+1)=0, ACC ¬ ([m]+1) Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ SNZ [m].i Skip if bit i of the data memory is not 0 Description If bit i of the specified data memory is not 0, the next instruction is skipped. If bit i of the data memory is not 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Operation Skip if [m].i¹0 Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ 38 August 28, 2006 HT82K95EE/HT82K95AE SUB A,[m] Subtract data memory from the accumulator Description The specified data memory is subtracted from the contents of the accumulator, leaving the result in the accumulator. Operation ACC ¬ ACC+[m]+1 Affected flag(s) TO PDF OV Z AC C ¾ ¾ Ö Ö Ö Ö SUBM A,[m] Subtract data memory from the accumulator Description The specified data memory is subtracted from the contents of the accumulator, leaving the result in the data memory. Operation [m] ¬ ACC+[m]+1 Affected flag(s) TO PDF OV Z AC C ¾ ¾ Ö Ö Ö Ö SUB A,x Subtract immediate data from the accumulator Description The immediate data specified by the code is subtracted from the contents of the accumulator, leaving the result in the accumulator. Operation ACC ¬ ACC+x+1 Affected flag(s) TO PDF OV Z AC C ¾ ¾ Ö Ö Ö Ö SWAP [m] Swap nibbles within the data memory Description The low-order and high-order nibbles of the specified data memory (1 of the data memories) are interchanged. Operation [m].3~[m].0 « [m].7~[m].4 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ SWAPA [m] Swap data memory and place result in the accumulator Description The low-order and high-order nibbles of the specified data memory are interchanged, writing the result to the accumulator. The contents of the data memory remain unchanged. Operation ACC.3~ACC.0 ¬ [m].7~[m].4 ACC.7~ACC.4 ¬ [m].3~[m].0 Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ 39 August 28, 2006 HT82K95EE/HT82K95AE SZ [m] Skip if data memory is 0 Description If the contents of the specified data memory are 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Operation Skip if [m]=0 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ SZA [m] Move data memory to ACC, skip if 0 Description The contents of the specified data memory are copied to the accumulator. If the contents is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Operation Skip if [m]=0 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ SZ [m].i Skip if bit i of the data memory is 0 Description If bit i of the specified data memory is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed with the next instruction (1 cycle). Operation Skip if [m].i=0 Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ TABRDC [m] Move the ROM code (locate by TBLP and TBHP) to TBLH and data memory (ROM code TBHP is enabled) Description The low byte of ROM code addressed by the table pointer (TBLP and TBHP) is moved to the specified data memory and the high byte transferred to TBLH directly. Operation [m] ¬ ROM code (low byte) TBLH ¬ ROM code (high byte) Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ TABRDC [m] Move the ROM code (current page) to TBLH and data memory (ROM code TBHP is disabled) Description The low byte of ROM code (current page) addressed by the table pointer (TBLP) is moved to the specified data memory and the high byte transferred to TBLH directly. Operation [m] ¬ ROM code (low byte) TBLH ¬ ROM code (high byte) Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ 40 August 28, 2006 HT82K95EE/HT82K95AE TABRDL [m] Move the ROM code (last page) to TBLH and data memory Description The low byte of ROM code (last page) addressed by the table pointer (TBLP) is moved to the data memory and the high byte transferred to TBLH directly. Operation [m] ¬ ROM code (low byte) TBLH ¬ ROM code (high byte) Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ ¾ ¾ ¾ XOR A,[m] Logical XOR accumulator with data memory Description Data in the accumulator and the indicated data memory perform a bitwise logical Exclusive_OR operation and the result is stored in the accumulator. Operation ACC ¬ ACC ²XOR² [m] Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ XORM A,[m] Logical XOR data memory with the accumulator Description Data in the indicated data memory and the accumulator perform a bitwise logical Exclusive_OR operation. The result is stored in the data memory. The 0 flag is affected. Operation [m] ¬ ACC ²XOR² [m] Affected flag(s) TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ XOR A,x Logical XOR immediate data to the accumulator Description Data in the accumulator and the specified data perform a bitwise logical Exclusive_OR operation. The result is stored in the accumulator. The 0 flag is affected. Operation ACC ¬ ACC ²XOR² x Affected flag(s) Rev. 1.20 TO PDF OV Z AC C ¾ ¾ ¾ Ö ¾ ¾ 41 August 28, 2006 HT82K95EE/HT82K95AE Package Information 28-pin SOP (300mil) Outline Dimensions 2 8 1 5 A B 1 1 4 C C ' G H D E Symbol Rev. 1.20 a F Dimensions in mil Min. Nom. Max. A 394 ¾ 419 B 290 ¾ 300 C 14 ¾ 20 C¢ 697 ¾ 713 D 92 ¾ 104 E ¾ 50 ¾ F 4 ¾ ¾ G 32 ¾ 38 H 4 ¾ 12 a 0° ¾ 10° 42 August 28, 2006 HT82K95EE/HT82K95AE Product Tape and Reel Specifications Reel Dimensions D T 2 A C B T 1 SOP 28W (300mil) Symbol Description Dimensions in mm A Reel Outer Diameter B Reel Inner Diameter 62±1.5 C Spindle Hole Diameter 13+0.5 -0.2 D Key Slit Width 330±1 2±0.5 T1 Space Between Flange 24.8+0.3 -0.2 T2 Reel Thickness 30.2±0.2 Rev. 1.20 43 August 28, 2006 HT82K95EE/HT82K95AE Carrier Tape Dimensions P 0 D P 1 t E F W C D 1 B 0 P K 0 A 0 SOP 28W (300mil) Symbol Description Dimensions in mm W Carrier Tape Width 24±0.3 P Cavity Pitch 12±0.1 E Perforation Position 1.75±0.1 F Cavity to Perforation (Width Direction) 11.5±0.1 D Perforation Diameter 1.5+0.1 D1 Cavity Hole Diameter 1.5+0.25 P0 Perforation Pitch 4±0.1 P1 Cavity to Perforation (Length Direction) 2±0.1 A0 Cavity Length 10.85±0.1 B0 Cavity Width 18.34±0.1 K0 Cavity Depth 2.97±0.1 t Carrier Tape Thickness 0.35±0.01 C Cover Tape Width Rev. 1.20 21.3 44 August 28, 2006 HT82K95EE/HT82K95AE Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor Inc. (Shanghai Sales Office) 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233 Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) 5/F, Unit A, Productivity Building, Cross of Science M 3rd Road and Gaoxin M 2nd Road, Science Park, Nanshan District, Shenzhen, China 518057 Tel: 0755-8616-9908, 8616-9308 Fax: 0755-8616-9533 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031 Tel: 010-6641-0030, 6641-7751, 6641-7752 Fax: 010-6641-0125 Holtek Semiconductor Inc. (Chengdu Sales Office) 709, Building 3, Champagne Plaza, No.97 Dongda Street, Chengdu, Sichuan, China 610016 Tel: 028-6653-6590 Fax: 028-6653-6591 Holmate Semiconductor, Inc. (North America Sales Office) 46729 Fremont Blvd., Fremont, CA 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright Ó 2006 by HOLTEK SEMICONDUCTOR INC. The information appearing in this handbook 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. 1.20 45 August 28, 2006