Precision Analog Microcontroller 12-bit Analog I/O, ARM7TDMI® MCU ADuC7019/20/21/22/24/25/26/27 On-chip peripherals UART, 2 × I2C® and SPI® serial I/O Up to 40-pin GPIO port1 4 × general-purpose timers Wake-up and watchdog timers (WDT) Power supply monitor Three-phase, 16-bit PWM generator1 Programmable logic array (PLA) External memory interface, up to 512 kB1 Power Specified for 3 V operation Active mode: 11 mA @ 5 MHz; 40 mA @ 41.78 MHz Packages and temperature range From 40-lead 6 mm × 6 mm LFCSP to 80-lead LQFP1 Fully specified for –40°C to +125°C operation Tools Low-cost QuickStart™ development system Full third-party support FEATURES Analog I/O Multichannel, 12-bit, 1 MSPS ADC Up to 16 ADC channels1 Fully differential and single-ended modes 0 to VREF analog input range 12-bit voltage output DACs Up to 4 DAC outputs available1 On-chip voltage reference On-chip temperature sensor (±3°C) Voltage comparator Microcontroller ARM7TDMI core, 16-bit/32-bit RISC architecture JTAG port supports code download and debug Clocking options Trimmed on-chip oscillator (±3%) External watch crystal External clock source up to 44 MHz 41.78 MHz PLL with programmable divider Memory 62 kB flash/EE memory, 8 kB SRAM In-circuit download, JTAG-based debug Software triggered in-circuit reprogrammability APPLICATIONS Industrial control and automation systems Smart sensors, precision instrumentation Base station systems, optical networking FUNCTIONAL BLOCK DIAGRAM MUX 1MSPS 12-BIT ADC ADC11 TEMP SENSOR ADuC7026 CMP0 CMP1 BANDGAP REF CMPOUT 12-BIT DAC DAC0 12-BIT DAC DAC1 12-BIT DAC DAC2 12-BIT DAC DAC3 VREF XCLKI OSC AND PLL ARM7TDMI-BASED MCU WITH ADDITIONAL PERIPHERALS XCLKO PSM RST POR THREEPHASE PWM PLA 2k × 32 SRAM 31k × 16 FLASH/EEPROM 4 GENERAL PURPOSE TIMERS SERIAL I/O UART, SPI, I2C GPIO JTAG EXT. MEMORY INTERFACE PWM0H PWM0L PWM1H PWM1L PWM2H PWM2L 04955-001 ADC0 Figure 1. 1 Depending on part model. See Ordering Guide for more information. Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. ADuC7019/20/21/22/24/25/26/27 TABLE OF CONTENTS Features .............................................................................................. 1 Transfer Function....................................................................... 37 Applications....................................................................................... 1 Typical Operation....................................................................... 38 Functional Block Diagram .............................................................. 1 MMRs Interface.......................................................................... 38 Revision History ............................................................................... 3 Converter Operation.................................................................. 40 General Description ......................................................................... 4 Driving the Analog Inputs ........................................................ 42 Detailed Block Diagram .............................................................. 5 Calibration................................................................................... 42 Specifications..................................................................................... 6 Temperature Sensor ................................................................... 42 Timing Specifications .................................................................. 9 Band Gap Reference................................................................... 42 Absolute Maximum Ratings.......................................................... 16 Nonvolatile Flash/EE Memory ..................................................... 43 ESD Caution................................................................................ 16 Programming.............................................................................. 43 Pin Configurations and Function Descriptions ......................... 17 Security ........................................................................................ 44 ADuC7019/ADuC7020/ADuC7021/ADuC7022 .................. 17 Flash/EE Control Interface ....................................................... 44 ADuC7024/ADuC7025 ............................................................. 20 Execution Time from SRAM and Flash/EE............................ 46 ADuC7026/ADuC7027 ............................................................. 23 Reset and Remap ........................................................................ 46 Typical Performance Characteristics ........................................... 27 Other Analog Peripherals.............................................................. 48 Terminology .................................................................................... 30 DAC.............................................................................................. 48 ADC Specifications .................................................................... 30 Power Supply Monitor ............................................................... 49 DAC Specifications..................................................................... 30 Comparator ................................................................................. 50 Overview of the ARM7TDMI Core............................................. 31 Oscillator and PLL—Power Control........................................ 51 Thumb Mode (T)........................................................................ 31 Digital Peripherals.......................................................................... 53 Long Multiply (M)...................................................................... 31 Three-Phase PWM..................................................................... 53 EmbeddedICE (I) ....................................................................... 31 General-Purpose Input/Output................................................ 60 Exceptions ................................................................................... 31 Serial Port Mux........................................................................... 62 ARM Registers ............................................................................ 31 UART Serial Interface................................................................ 62 Interrupt Latency........................................................................ 32 Serial Peripheral Interface......................................................... 65 Memory Organization ................................................................... 33 I2C Compatible Interfaces ......................................................... 67 Memory Access........................................................................... 33 Programmable Logic Array (PLA)........................................... 71 Flash/EE Memory....................................................................... 33 Processor Reference Peripherals................................................... 74 SRAM ........................................................................................... 33 Interrupt System ......................................................................... 74 Memory Mapped Registers ....................................................... 33 Timers .......................................................................................... 75 ADC Circuit Overview .................................................................. 37 External Memory Interfacing ................................................... 79 Rev. A | Page 2 of 92 ADuC7019/20/21/22/24/25/26/27 Hardware Design Considerations .................................................83 PC-Based Tools ...........................................................................86 Power Supplies.............................................................................83 In-Circuit Serial Downloader ...................................................86 Grounding and Board Layout Recommendations .................84 Outline Dimensions........................................................................87 Clock Oscillator...........................................................................84 Ordering Guide ...........................................................................89 Power-on Reset Operation.........................................................85 Typical System Configuration ...................................................85 Development Tools .........................................................................86 REVISION HISTORY 1/06—Rev. 0 to Rev. A Changes to Table 1 ............................................................................6 Added the Flash/EE Memory Reliability Section .......................43 Changes to Table 30 ........................................................................52 Changes to Serial Peripheral Interface .........................................66 Changes to Ordering Guide...........................................................90 10/05—Revision 0: Initial Version Rev. A | Page 3 of 92 ADuC7019/20/21/22/24/25/26/27 GENERAL DESCRIPTION The ADuC7019/7020/7021/7022/7024/7025/7026/7027 are fully integrated, 1 MSPS, 12-bit data acquisition systems incorporating high performance multichannel ADCs, 16-bit/32-bit MCUs and Flash/EE memory on a single chip. The ADC consists of up to 12 single-ended inputs. An additional four inputs are available but are multiplexed with the four DAC output pins. The four DAC outputs are only available on certain models (ADuC7020, and ADuC7026). However, in many cases where the DAC outputs are not present, these pins can still be used as additional ADC inputs, giving a maximum of 16 ADC input channels. The ADC can operate in single-ended or differential input modes. The ADC input voltage is 0 to VREF. Low-drift bandgap reference, temperature sensor, and voltage comparator complete the ADC peripheral set. Depending on the part model, up to four buffered voltage output DACs are available on-chip. The DAC output range is programmable to one of three voltage ranges. The devices operate from an on-chip oscillator and a PLL generating an internal high frequency clock of 41.78 MHz. This clock is routed through a programmable clock divider from which the MCU core clock operating frequency is generated. The microcontroller core is an ARM7TDMI, 16-bit/32-bit RISC machine, which offers up to 41 MIPS peak performance. Eight kilobytes of SRAM and 62 kilobytes of nonvolatile Flash/EE memory are provided on-chip. The ARM7TDMI core views all memory and registers as a single linear array. On-chip factory firmware supports in-circuit serial download via the UART or I2C serial interface ports, while nonintrusive emulation is also supported via the JTAG interface. These features are incorporated into a low-cost QuickStart™ Development System supporting this MicroConverter® family. The parts operate from 2.7 V to 3.6 V and are specified over an industrial temperature range of −40°C to +125°C. When operating at 41.78 MHz, the power dissipation is typically 120 mW. The ADuC7019/7020/7021/7022/7024/7025/7026/7027 are available in a variety of memory models and packages. Rev. A | Page 4 of 92 ADuC7019/20/21/22/24/25/26/27 GNDREF AGND AGND REFGND AVDD AVDD IOGND IOVDD IOGND IOVDD DGND LVDD RST DACV DD DACGND DACREF DETAILED BLOCK DIAGRAM 8 72 71 67 73 74 53 26 25 54 28 27 37 75 70 69 ADuC7026* ADC0 77 ADC1 78 12-BIT SAR ADC 1MSPS ADC2/CMP0 79 ADC3/CMP1 80 ADC CONTROL ADC4 1 12-BIT VOLTAGE OUTPUTDAC BUF 10 DAC0*/ADC12 12-BIT VOLTAGE OUTPUTDAC BUF 11 DAC1*/ADC13 12-BIT VOLTAGE OUTPUTDAC BUF 12 DAC2*/ADC14 12-BIT VOLTAGE OUTPUTDAC BUF 13 DAC3*/ADC15 DAC CONTROL ADC5 2 ADC6 3 MUX ADC7 4 ADC8 5 ADC9 6 ADC10 7 ADC11 76 TEMP SENSOR ADCNEG 9 29 P3.0/AD0/PWM0H/PLAI[8] 62KBYTES FLASH/EE (31k × 16 BITS) 30 P3.1/AD1/PWM0L/PLAI[9] 31 P3.2/AD2/PWM1H/PLAI[10] THREEPHASE PWM ARM7TDMI 8192 BYTES USER RAM CMPOUT/IRQ (2k × 32 BITS) MUX DAC WAKEUP/ RTC TIMER MCU CORE 32 P3.3/AD3/PWM1L/PLAI[11] 38 P3.4/AD4/PWM2H/PLAI[12] 39 P3.5/AD5/PWM2L/PLAI[13] BM/P0.0/CMPOUT/PLAI[7]/MS2 20 46 P3.6/AD6/PWMTRIP/PLAI[14] POWER SUPPLY MONITOR DOWNLOADER VREF 68 VREF 47 P3.7/AD7/PWMSYNC /PLAI[15] OSC 43 P0.7/ECLK/XCLK/SPM8/PLAO[4] Figure 2. Rev. A | Page 5 of 92 33 35 36 48 24 16 *SEE SELECTION TABLE FOR FEATURE AVAILABILITY ON DIFFERENT MODELS. 04955-002 17 P0.1/PWM2H/BLE 50 P0.2/PWM2L/BHE 49 P2.7/PWM1L/MS3 P1.2/SPM2/PLAI[2] 21 41 IRQ1/P0.5/ADCBUSY /PLAO[2]/MS0 P2.5/PWM0L/MS1 P1.1/SPM1/PLAI[1] 14 15 23 22 34 P2.3/AE P1.0/T1/SPM0/PLAI[0] 42 P2.2/RS/PWM0L/PLAO[7] P4.5/AD13/PLAO[13] 51 P2.1/WS/PWM0H/PLAO[6] P4.4/AD12/PLAO[12] 52 P0.6/T1/MRST/PLAO[3]/AE P4.3/AD11/PLAO[11] 57 TCK P4.2/AD10/PLAO[10] 58 P0.3/TRST/A16/ADC BUSY P4.1/AD9/PLAO[9] 59 TDI 60 TDO 61 TMS 62 P2.0/SPM9/PLAO[5]/CONVSTART 66 P1.7/SPM7/PLAO[0] 65 P1.6/SPM6/PLAI[6] 64 P1.5/SPM5/PLAI[5]/IRQ3 63 P1.3/SPM3/PLAI[3] 56 40 IRQ0/P0.4/PWMTRIP/PLAO[1]/MS1 INTERRUPT CONTROLLER POR P1.4/SPM4/PLAI[4]/IRQ2 55 45 XCLKI P2.6/PWM1H/MS2 UART SERIAL PORT SERIAL PORT MULTIPLEXER P4.0/AD8/PLAO[8] P4.7/AD15/PLAO[15] 19 PROG. LOGIC ARRAY PLL P2.4/PWM0H/MS0 SPI/I2C SERIAL INTERFACE P4.6/AD14/PLAO[14] 18 44 XCLKO PROG. CLOCK DIVIDER JTAG EMULATOR BAND GAP REFERENCE ADuC7019/20/21/22/24/25/26/27 SPECIFICATIONS AVDD = IOVDD = 2.7 V to 3.6 V, VREF = 2.5 V internal reference, fCORE = 41.78 MHz, TA = 40°C to 125°C, unless otherwise noted. Table 1. Parameter ADC CHANNEL SPECIFICATIONS ADC Power-Up Time DC Accuracy 1, 2 Resolution Integral Nonlinearity Min Max 5 ±0.6 ±1.0 ±0.5 +0.7/−0.6 1 DC Code Distribution ENDPOINT ERRORS 5 Offset Error Offset Error Match Gain Error Gain Error Match DYNAMIC PERFORMANCE Signal-to-Noise Ratio (SNR) Total Harmonic Distortion (THD) Peak Harmonic or Spurious Noise Channel-to-Channel Crosstalk ANALOG INPUT Input Voltage Ranges Differential Mode ±1 ±1 ±2 ±1 ±1.5 +1/−0.9 ±2 ±5 69 −78 −75 −80 ±1 20 Bits LSB LSB LSB LSB LSB Test Conditions/Comments Eight acquisition clocks and fADC/2 VCM 6 ±VREF/2 0 to VREF ±6 ±5 ±40 75 70 1 AVDD 65 2.5 V internal reference 1.0 V external reference 2.5 V internal reference 1.0 V external reference ADC input is a dc voltage LSB LSB LSB LSB dB dB dB dB 2.5 0.625 Unit μs 12 Differential Nonlinearity 3, 4 Single-Ended Mode Leakage Current Input Capacitance ON-CHIP VOLTAGE REFERENCE Output Voltage Accuracy Reference Temperature Coefficient Power Supply Rejection Ratio Output Impedance Internal VREF Power-On Time EXTERNAL REFERENCE INPUT 7 Input Voltage Range Input Impedance DAC CHANNEL SPECIFICATIONS DC ACCURACY 8 Resolution Relative Accuracy Differential Nonlinearity Offset Error Gain Error 9 Gain Error Mismatch Typ fIN = 10 kHz sine wave, fSAMPLE = 1 MSPS Includes distortion and noise components Measured on adjacent channels V V μA pF V mV ppm/°C dB Ω ms During ADC acquisition 0.47 μF from VREF to AGND TA = 25°C TA = 25°C V kΩ RL = 5 kΩ, CL = 100 pF 12 ±2 ±1 ±15 ±1 0.1 Rev. A | Page 6 of 92 Bits LSB LSB mV % % Guaranteed monotonic 2.5 V internal reference % of full scale on DAC0 ADuC7019/20/21/22/24/25/26/27 Parameter ANALOG OUTPUTS Output Voltage Range_0 Min Output Voltage Range_1 Output Voltage Range_2 Output Impedance DAC AC CHARACTERISTICS Voltage Output Settling Time Digital to Analog Glitch Energy COMPARATOR Input Offset Voltage Input Bias Current Input Voltage Range Input Capacitance Hysteresis4, 6 Max Test Conditions/Comments 0 to DACREF 0 to 2.5 0 to DACVDD 2 V DACREF range: DACGND to DACVDD 10 ±20 μs nV-sec ±15 1 mV μA V pF mV V V Ω AVDD − 1.2 7 2 TEMPERATURE SENSOR Voltage Output at 25°C Voltage TC Accuracy POWER SUPPLY MONITOR (PSM) IOVDD Trip Point Selection Input Capacitance LOGIC INPUTS3 VINL, Input Low Voltage VINH, Input High Voltage LOGIC OUTPUTS VOH, Output High Voltage VOL, Output Low Voltage 12 CRYSTAL INPUTS XCLKI and XCLKO Logic Inputs, XCLKI Only VINL, Input Low Voltage VINH, Input High Voltage XCLKI Input Capacitance XCLKO Output Capacitance Unit AGND Response Time Power Supply Trip Point Accuracy POWER-ON RESET GLITCH IMMUNITY ON RESET PIN3 WATCHDOG TIMER (WDT) Timeout Period FLASH/EE MEMORY Endurance 10 Data Retention 11 DIGITAL INPUTS Logic 1 Input Current Logic 0 Input Current Typ 15 3 μs 780 −1.3 ±3 mV mV/°C °C 2.79 3.07 ±2.5 2.36 50 V V % V μs 0 512 10,000 20 1 LSB change at major carry Hysteresis can be turned on or off via the CMPHYST bit in the CMPCON register 100 mV overdrive and configured with CMPRES = 11 Two selectable trip points Of the selected nominal trip point voltage sec cycles years ±0.2 −40 ±1 −60 μA μA −80 10 −120 μA pF 0.8 V V TJ = 85°C All digital inputs excluding XCLKI and XCLKO VIH = VDD or VIH = 5 V VIL = 0 V; except TDI on ADuC7019/20/21/22/24/25 VIL = 0 V; TDI, on ADuC7019/20/21/22/24/25 All logic inputs excluding XCLKI and XCLKO 2.0 2.4 0.4 1.1 1.7 20 20 V V V V pF pF Rev. A | Page 7 of 92 All digital outputs excluding XCLKI and XCLKO ISOURCE = 1.6 mA ISINK = 1.6 mA ADuC7019/20/21/22/24/25/26/27 Parameter INTERNAL OSCILLATOR MCU CLOCK RATE From 32 kHz Internal Oscillator From 32 kHz External Crystal Using an External Clock Min DACVDD Current 15 Digital Power Supply Current IOVDD Current in Normal Mode IOVDD Current in Pause Mode IOVDD Current in Sleep Mode Additional Power Supply Currents ADC DAC Max Test Conditions/Comments ±3 Unit kHz % 44 41.78 kHz MHz MHz MHz CD = 7 CD = 0 TA = 85°C TA = 125°C Core clock = 41.78 MHz 326 41.78 0.05 0.05 START-UP TIME At Power-On From Pause/Nap Mode From Sleep Mode From Stop Mode PROGRAMMABLE LOGIC ARRAY (PLA) Pin Propagation Delay Element Propagation Delay POWER REQUIREMENTS 13, 14 Power Supply Voltage Range AVDD − AGND and IOVDD − IOGND Analog Power Supply Currents AVDD Current Typ 32.768 130 24 3.06 1.58 1.7 ms ns μs ms ms 12 2.5 ns ns 2.7 CD = 0 CD = 7 From input pin to output pin 3.6 V 200 400 3 25 μA μA μA 7 11 40 25 250 600 10 15 45 30 400 1000 mA mA mA mA μA μA Code executing from Flash/EE CD = 7 CD = 3 CD = 0 (41.78 MHz clock) CD = 0 (41.78 MHz clock) TA = 85°C TA = 125°C mA mA μA @ 1 MSPS @ 62.5 kSPS per DAC 2 0.7 700 1 ADC in idle mode; all parts except ADuC7019 ADC in idle mode; ADuC7019 only All ADC channel specifications are guaranteed during normal MicroConverter core operation. Apply to all ADC input channels. Measured using the factory set default values in ADCOF and ADCGN. 4 Not production tested but supported by design and/or characterization data on production release. 5 Measured using the factory set default values in ADCOF and ADCGN using an external AD845 op amp as an input buffer stage as shown in Figure 47. Based on external ADC system components, the user may need to execute a system calibration to remove external endpoint errors and achieve these specifications (see the Calibration section). 6 The input signal can be centered on any dc common-mode voltage (VCM) as long as this value is within the ADC voltage input range specified. 7 When using an external reference input pin, the internal reference must be disabled by setting the LSB in the REFCON memory mapped register to 0. 8 DAC linearity is calculated using a reduced code range of 100 to 3995. 9 DAC gain error is calculated using a reduced code range of 100 to internal 2.5 V VREF. 10 Endurance is qualified as per JEDEC Standard 22 method A117 and measured at −40°C, +25°C, +85°C, and +125°C. 11 Retention lifetime equivalent at junction temperature (TJ) = 85°C as per JEDEC Standard 22 method A117. Retention lifetime derates with junction temperature. 12 Test carried out with a maximum of eight I/O set to a low output level. 13 Power supply current consumption is measured in normal, pause, and sleep modes under the following conditions: Normal Mode: 3.6 V supply, Pause Mode: 3.6 V supply, Sleep Mode: 3.6 V supply. 14 IOVDD power supply current decreases typically by 2 mA during a flash/EE erase cycle. 15 On the ADuC7019/20/21/22, this current must be added to AVDD current. 2 3 Rev. A | Page 8 of 92 ADuC7019/20/21/22/24/25/26/27 TIMING SPECIFICATIONS Table 2. External Memory Write Cycle Parameter CLK TMS_AFTER_CLKH TADDR_AFTER_CLKH TAE_H_AFTER_MS TAE THOLD_ADDR_AFTER_AE_L THOLD_ADDR_BEFORE_WR_L TWR_L_AFTER_AE_L TDATA_AFTER_WR_L TWR TWR_H_AFTER_CLKH THOLD_DATA_AFTER_WR_H TBEN_AFTER_AE_L TRELEASE_MS_AFTER_WR_H Min Typ UCLK 0 4 Max Unit 4 8 ns ns 12 ns 4 ns ½ CLK (XMxPAR[14:12] + 1) x CLK ½ CLK + (!XMxPAR[10]) x CLK (!XMxPAR[8]) x CLK ½ CLK + (!XMxPAR[10] + !XMxPAR[8]) x CLK 8 (XMxPAR[7:4] + 1) x CLK 0 (!XMxPAR[8]) x CLK ½ CLK (!XMxPAR[8] + 1) x CLK CLK CLK TMS_AFTER_CLKH MS TWR_L_AFTER_AE_L TAE_H_AFTER_MS AE TWR TRELEASE_MS_AFTER_WR_H TAE TWR_H_AFTER_CLKH WR THOLD_DATA_AFTER_WR_H RD THOLD_ADDR_AFTER_AE_L THOLD_ADDR_BEFORE_WR_L TADDR_AFTER_CLKH A/D[15:0] FFFF 9ABC TDATA_AFTER_WR_L 5678 9ABE 1234 TBEN_AFTER_AE_L BEN0 04955-052 BEN1 A16 Figure 3. External Memory Write Cycle Rev. A | Page 9 of 92 ADuC7019/20/21/22/24/25/26/27 Table 3. External Memory Read Cycle Parameter CLK TMS_AFTER_CLKH TADDR_AFTER_ CLKH TAE_H_AFTER_MS TAE THOLD_ADDR_AFTER_AE_L TRD_L_AFTER_AE_L TDATA_AFTER_RD_L TRD TRD_H_AFTER_CLKH THOLD_DATA_AFTER_RD_H TRELEASE_MS_AFTER_RD_H Min Typ UCLK 4 4 Max Unit 8 16 ns ns 12 ns 4 ns ½ CLK (XMxPAR[14:12] + 1) x CLK ½ CLK + (!XMxPAR[10]) x CLK ½ CLK + (!XMxPAR[10] + !XMxPAR[9]) x CLK 8 (XMxPAR[3:0] + 1) x CLK 0 (!XMxPAR[9]) x CLK CLK CLK ECLK TMS_AFTER_CLKH GP0 TAE_H_AFTER_MS TRELEASE_MS_AFTER_RD_H TRD_H_AFTER_CLKH TAE TRD_L_AFTER_AE_L AE WR TRD RD THOLD_DATA_AFTER_RD_H TDATA_AFTER_RD_L TADDR_AFTER_CLKH A/D[15:0] FFFF 234B THOLD_ADDR_AFTER_AE_L CDEF D14A 234A 89AB BEN1 04955-053 BEN0 A16 Figure 4. External Memory Read Cycle Rev. A | Page 10 of 92 ADuC7019/20/21/22/24/25/26/27 Table 4. I2C Timing in Fast Mode (400 kHz) Parameter tL tH tSHD tDSU tDHD tRSU tPSU tBUF tR tF tSUP Min 200 100 300 100 50 100 100 1.3 100 60 Slave Max 300 100 50 Master Typ 1360 1140 251350 740 400 12.51350 400 Unit ns ns ns ns ns ns ns μs ns ns ns 200 20 tHCLK depends on the clock divider or CD bits in PLLCON MMR. tHCLK = tUCLK/2CD. tBUF tSUP tR SDATA (I/O) MSB LSB tDSU tSHD PS tF tDHD 2–7 tR tRSU tH 1 SCLK (I) MSB tDSU tDHD tPSU ACK 8 tL 9 tSUP STOP START CONDITION CONDITION 1 S(R) REPEATED START Figure 5. I2C Compatible Interface Timing Rev. A | Page 11 of 92 tF 04955-054 1 Description SCLOCK low pulse width 1 SCLOCK high pulse width1 Start condition hold time Data setup time Data hold time Setup time for repeated start Stop condition setup time Bus-free time between a stop condition and a start condition Rise time for both CLOCK and SDATA Fall time for both CLOCK and SDATA Pulse width of spike suppressed ADuC7019/20/21/22/24/25/26/27 Table 5. SPI Master Mode Timing (PHASE Mode = 1) Parameter tSL tSH tDAV tDSU tDHD tDF tDR tSR tSF 2 Min Typ (SPIDIV + 1) × tHCLK (SPIDIV + 1) × tHCLK Max 25 1 × tUCLK 2 × tUCLK 5 5 5 5 12.5 12.5 12.5 12.5 tHCLK depends on the clock divider or CD bits in PLLCON MMR. tHCLK = tUCLK/2CD. tUCLK = 23.9 ns. It corresponds to the 41.78 MHz internal clock from the PLL before the clock divider. SCLOCK (POLARITY = 0) tSH tSL tSR SCLOCK (POLARITY = 1) tDAV tDF MOSI MISO tSF tDR MSB MSB IN BITS 6–1 BITS 6–1 tDSU tDHD Figure 6. SPI Master Mode Timing (PHASE Mode = 1) Rev. A | Page 12 of 92 LSB LSB IN 04955-055 1 Description SCLOCK low pulse width 1 SCLOCK high pulse width1 Data output valid after SCLOCK edge Data input setup time before SCLOCK edge 2 Data input hold time after SCLOCK edge2 Data output fall time Data output rise time SCLOCK rise time SCLOCK fall time Unit ns ns ns ns ns ns ns ns ns ADuC7019/20/21/22/24/25/26/27 Table 6. SPI Master Mode Timing (PHASE Mode = 0) Parameter tSL tSH tDAV tDOSU tDSU tDHD tDF tDR tSR tSF 2 Min Typ (SPIDIV + 1) × tHCLK (SPIDIV + 1) × tHCLK Max 25 75 1 × tUCLK 2 × tUCLK 5 5 5 5 12.5 12.5 12.5 12.5 tHCLK depends on the clock divider or CD bits in PLLCON MMR. tHCLK = tUCLK/2CD. tUCLK = 23.9 ns. It corresponds to the 41.78 MHz internal clock from the PLL before the clock divider. SCLOCK (POLARITY = 0) tSH tSL tSR tSF SCLOCK (POLARITY = 1) tDAV tDOSU MOSI MISO tDF MSB MSB IN tDR BITS 6–1 BITS 6–1 LSB LSB IN tDSU 04955-056 1 Description SCLOCK low pulse width 1 SCLOCK high pulse width1 Data output valid after SCLOCK edge Data output setup before SCLOCK edge Data input setup time before SCLOCK edge 2 Data input hold time after SCLOCK edge2 Data output fall time Data output rise time SCLOCK rise time SCLOCK fall time tDHD Figure 7. SPI Master Mode Timing (PHASE Mode = 0) Rev. A | Page 13 of 92 Unit ns ns ns ns ns ns ns ns ns ns ADuC7019/20/21/22/24/25/26/27 Table 7. SPI Slave Mode Timing (PHASE Mode = 1) Parameter tCS Description CS to SCLOCK edge 1 tSL tSH tDAV tDSU tDHD tDF tDR tSR tSF tSFS SCLOCK low pulse width 2 SCLOCK high pulse width2 Data output valid after SCLOCK edge Data input setup time before SCLOCK edge1 Data input hold time after SCLOCK edge1 Data output fall time Data output rise time SCLOCK rise time SCLOCK fall time CS high after SCLOCK edge 2 Typ Max (SPIDIV + 1) × tHCLK (SPIDIV + 1) × tHCLK 25 1 × tUCLK 2 × tUCLK 5 5 5 5 12.5 12.5 12.5 12.5 0 tUCLK = 23.9 ns. It corresponds to the 41.78 MHz internal clock from the PLL before the clock divider. tHCLK depends on the clock divider or CD bits in PLLCON MMR. tHCLK = tUCLK/2CD. CS tSFS tCS SCLOCK (POLARITY = 0) tSH tSL tSR tSF SCLOCK (POLARITY = 1) tDAV MISO tDF tDR MSB MOSI MSB IN BITS 6–1 BITS 6–1 tDSU LSB LSB IN 04955-057 1 Min 2 × tHCLK + 2 × tUCLK tDHD Figure 8. SPI Slave Mode Timing (PHASE Mode = 1) Rev. A | Page 14 of 92 Unit ns ns ns ns ns ns ns ns ns ns ns ADuC7019/20/21/22/24/25/26/27 Table 8. SPI Slave Mode Timing (PHASE Mode = 0) Parameter tCS Description CS to SCLOCK edge 1 tSL tSH tDAV tDSU tDHD tDF tDR tSR tSF tDOCS tSFS SCLOCK low pulse width 2 SCLOCK high pulse width2 Data output valid after SCLOCK edge Data input setup time before SCLOCK edge1 Data input hold time after SCLOCK edge1 Data output fall time Data output rise time SCLOCK rise time SCLOCK fall time Data output valid after CS edge CS high after SCLOCK edge 2 Typ Max (SPIDIV + 1) × tHCLK (SPIDIV + 1) × tHCLK 25 1 × tUCLK 2 × tUCLK 5 5 5 5 12.5 12.5 12.5 12.5 25 0 tUCLK = 23.9 ns. It corresponds to the 41.78 MHz internal clock from the PLL before the clock divider. tHCLK depends on the clock divider or CD bits in PLLCON MMR. tHCLK = tUCLK/2CD. CS tCS tSFS SCLOCK (POLARITY = 0) tSH tSL tSF tSR SCLOCK (POLARITY = 1) tDAV tDOCS tDF MISO MOSI MSB MSB IN tDR BITS 6–1 BITS 6–1 LSB LSB IN 04955-058 1 Min 2 × tHCLK + 2 × tUCLK tDSU tDHD Figure 9. SPI Slave Mode Timing (PHASE Mode = 0) Rev. A | Page 15 of 92 Unit ns ns ns ns ns ns ns ns ns ns ns ns ADuC7019/20/21/22/24/25/26/27 ABSOLUTE MAXIMUM RATINGS AGND = REFGND = DACGND = GNDREF; TA = 25°C, unless otherwise noted. Table 9. Parameter AVDD to IOVDD AGND to DGND IOVDD to IOGND, AVDD to AGND Digital Input Voltage to IOGND Digital Output Voltage to IOGND VREF to AGND Analog Inputs to AGND Analog Outputs to AGND Operating Temperature Range Industrial Storage Temperature Range Junction Temperature θJA Thermal Impedance (40-pin CSP) θJA Thermal Impedance (64-pin CSP) θJA Thermal Impedance (64-pin LQFP) θJA Thermal Impedance (80-pin LQFP) Peak Solder Reflow Temperature SnPb Assemblies (10 sec to 30 sec) Pb-Free Assemblies (20 sec to 40 sec) Rating −0.3 V to +0.3 V −0.3 V to +0.3 V −0.3 V to +6 V −0.3 V to +5.3 V −0.3 V to IOVDD + 0.3 V −0.3 V to AVDD + 0.3 V −0.3 V to AVDD + 0.3 V −0.3 V to AVDD + 0.3 V Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Only one absolute maximum rating can be applied at any one time. –40°C to +125°C –65°C to +150°C 150°C 26°C/W 24°C/W 47°C/W 38°C/W 240°C 260°C ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. A | Page 16 of 92 ADuC7019/20/21/22/24/25/26/27 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TOP VIEW (Not to Scale) ADC3/CMP1 ADC2/CMP0 ADC1 ADC0 AVDD AGND VREF P1.0/T1/SPM0/PLAI[0] P1.1/SPM1/PLAI[1] P1.2/SPM2/PLAI[2] P1.3/SPM3/PLAI[3] P1.4/SPM4/PLAI[4]/IRQ2 P1.5/SPM5/PLAI[5]/IRQ3 P1.6/SPM6/PLAI[6] P1.7/SPM7/PLAO[0] XCLKI XCLKO P0.7/ECLK/XCLK/SPM8/PLAO[4] P2.0/SPM9/PLAO[5]/CONVSTART IRQ1/P0.5/ADCBUSY/PLAO[2] ADC4 1 ADC5 2 ADC6 3 ADC7 4 GNDREF 5 6 DAC0/ADC12 7 DAC1/ADC13 TMS 8 9 TDI BM/P0.0/CMPOUT/PLAI[7] 10 PIN 1 INDICATOR ADuC7021 TOP VIEW (Not to Scale) 30 29 28 27 26 25 24 23 22 21 P1.3/SPM3/PLAI[3] P1.4/SPM4/PLAI[4]/IRQ2 P1.5/SPM5/PLAI[5]/IRQ3 P1.6/SPM6/PLAI[6] P1.7/SPM7/PLAO[0] XCLKI XCLKO P0.7/ECLK/XCLK/SPM8/PLAO[4] P2.0/SPM9/PLAO[5]/CONVSTART IRQ1/P0.5/ADCBUSY/PLAO[2] P0.6/T1/MRST/PLAO[3] TCK TDO IOGND IOVDD LVDD DGND P0.3/TRST/ADC BUSY RST IRQ0/P0.4/PWMTRIP/PLAO[1] 04955-064 P0.6/T1/MRST/PLAO[3] TCK TDO IOGND IOVDD LVDD DGND P0.3/TRST/ADC BUSY RST IRQ0/P0.4/PWMTRIP/PLAO[1] Figure 11. ADuC702140-Lead LFCSP_VQ Pin Configuration 40 39 38 37 36 35 34 33 32 31 ADC4 ADC3/CMP1 ADC2/CMP0 ADC1 ADC0 AVDD AGND VREF P1.0/T1/SPM0/PLAI[0] P1.1/SPM1/PLAI[1] Figure 10. ADuC7019/ADuC7020 40-Lead LFCSP_VQ Pin Configuration PIN 1 INDICATOR ADuC7022 TOP VIEW (Not to Scale) 30 29 28 27 26 25 24 23 22 21 P1.2/SPM2/PLAI[2] P1.3/SPM3/PLAI[3] P1.4/SPM4/PLAI[4]/IRQ2 P1.5/SPM5/PLAI[5]/IRQ3 P1.6/SPM6/PLAI[6] P1.7/SPM7/PLAO[0] XCLKI XCLKO P0.7/ECLK/XCLK/SPM8/PLAO[4] P2.0/SPM9/PLAO[5]/CONVSTART Figure 12. ADuC7022 40-Lead LFCSP_VQ Pin Configuration Rev. A | Page 17 of 92 04955-066 TCK TDO IOGND IOVDD LVDD DGND P0.3/TRST/ADC BUSY RST IRQ0/P0.4/PWMTRIP/PLAO[1] IRQ1/P0.5/ADCBUSY/PLAO[2] 11 12 13 14 15 16 17 18 19 20 ADC5 1 ADC6 2 ADC7 3 ADC8 4 ADC9 5 GNDREF 6 TMS 7 8 TDI BM/P0.0/CMPOUT/PLAI[7] 9 P0.6/T1/MRST/PLAO[3] 10 04955-065 ADuC7019/ ADuC7020 30 29 28 27 26 25 24 23 22 21 11 12 13 14 15 16 17 18 19 20 PIN 1 INDICATOR 11 12 13 14 15 16 17 18 19 20 ADC3/CMP1 1 ADC4 2 GNDREF 3 4 DAC0/ADC12 5 DAC1/ADC13 6 DAC2/ADC14 7 DAC3/ADC15 TMS 8 9 TDI BM/P0.0/CMPOUT/PLAI[7] 10 40 39 38 37 36 35 34 33 32 31 40 39 38 37 36 35 34 33 32 31 ADC2/CMP0 ADC1 ADC0 AVDD AGND VREF P4.2/PLAO[10] P1.0/T1/SPM0/PLAI[0] P1.1/SPM1/PLAI[1] P1.2/SPM2/PLAI[2] ADuC7019/ADuC7020/ADuC7021/ADuC7022 ADuC7019/20/21/22/24/25/26/27 Table 10. Pin Function Descriptions (ADuC7019/ADuC7020/ADuC7021/ADuC7022) Pin No. 7019/7020 7021 38 37 39 38 40 39 1 40 7022 36 37 38 39 Mnemonic ADC0 ADC1 ADC2/CMP0 ADC3/CMP1 2 ‒ 1 2 40 1 ADC4 ADC5 Description Single-Ended or Differential Analog Input 0. Single-Ended or Differential Analog Input 1. Single-Ended or Differential Analog Input 2/Comparator Positive Input. Single-Ended or Differential Analog Input 3 (Buffered Input on ADuC7019)/Comparator Negative Input. Single-Ended or Differential Analog Input 4. Single-Ended or Differential Analog Input 5. ‒ 3 2 ADC6 Single-Ended or Differential Analog Input 6. ‒ 4 3 ADC7 Single-Ended or Differential Analog Input 7. ‒ ‒ 4 ADC8 Single-Ended or Differential Analog Input 8. ‒ 3 ‒ 5 5 ADC9 Single-Ended or Differential Analog Input 9. 6 GNDREF 4 6 ‒ DAC0/ADC12 Ground Voltage Reference for the ADC. For optimal performance, the analog power supply should be separated from IOGND and DGND. DAC0 Voltage Output/Single-Ended or Differential Analog Input 12. 5 7 ‒ DAC1/ADC13 DAC1 Voltage Output/Single-Ended or Differential Analog Input 13. 6 ‒ ‒ DAC2/ADC14 DAC2 Voltage Output/Single-Ended or Differential Analog Input 14. 7 ‒ ‒ DAC3/ADC15 8 9 10 8 9 10 7 8 9 TMS TDI BM/P0.0/CMPOUT/PLAI[7] 11 11 10 P0.6/T1/MRST/PLAO[3] 12 13 14 15 16 12 13 14 15 16 11 12 13 14 15 TCK TDO IOGND IOVDD LVDD 17 18 17 18 16 17 DGND P0.3/TRST/ADCBUSY 19 20 19 20 18 19 RST IRQ0/P0.4/PWMTRIP/PLAO[1] 21 21 20 IRQ1/P0.5/ADCBUSY/PLAO[2] 22 22 21 P2.0/SPM9/PLAO[5]/CONVSTART 23 23 22 P0.7/ECLK/XCLK/SPM8/PLAO[4] 24 24 23 XCLKO DAC3 Voltage Output on ADuC7020. On the ADuC7019, a 10 nF capacitor needs to be connected between this pin and AGND/Single-Ended or Differential Analog Input 15. Test Mode Select, JTAG Test Port Input. Debug and download access. Test Data In, JTAG Test Port Input. Debug and download access. Multifunction I/O Pin. Boot Mode (BM). The ADuC7019/20/21/22 enter serial download mode if BM is low at reset and execute code if BM is pulled high at reset through a 1 kΩ resistor. General-Purpose Input and Output Port 0.0/Voltage Comparator Output/Programmable Logic Array Input Element 7. Multifunction Pin, Driven Low After Reset. General-Purpose Output Port 0.6/Timer1 Input/Power-On Reset Output/Programmable Logic Array Output Element 3. Test Clock, JTAG Test Port Input. Debug and download access. Test Data Out, JTAG Test Port Output. Debug and download access. Ground for GPIO. Typically connected to DGND. 3.3 V Supply for GPIO and Input of the On-Chip Voltage Regulator. 2.6 V Output of the On-Chip Voltage Regulator. This output must be connected to a 0.47 μf capacitor to DGND only. Ground for Core Logic. General-Purpose Input and Output Port 0.3/Test Reset, JTAG Test Port Input/ ADCBUSY Signal Output. Reset Input, Active Low. Multifunction I/O Pin. External Interrupt Request 0, Active High/GeneralPurpose Input and Output Port 0.4/PWM Trip External Input/Programmable Logic Array Output Element 1. Multifunction I/O Pin. External Interrupt Request 1, Active High/GeneralPurpose Input andOutput Port 0.5/ADCBUSY Signa l Output/Programmable Logic Array Output Element 2. Serial Port Multiplexed. General-Purpose Input and Output Port 2.0/UART/ Programmable Logic Array Output Element 5/Start Conversion Input Signal for ADC. Serial Port Multiplexed. General-Purpose Input and Output Port 0.7/Output for External Clock Signal/Input to the Internal Clock Generator Circuits/UART/ Programmable Logic Array Output Element 4. Output from the Crystal Oscillator Inverter. Rev. A | Page 18 of 92 ADuC7019/20/21/22/24/25/26/27 Pin No. 7019/7020 7021 25 25 7022 24 Mnemonic XCLKI 26 26 25 P1.7/SPM7/PLAO[0] 27 27 26 P1.6/SPM6/PLAI[6] 28 28 27 P1.5/SPM5/PLAI[5]/IRQ3 29 29 28 P1.4/SPM4/PLAI[4]/IRQ2 30 30 29 P1.3/SPM3/PLAI[3] 31 31 30 P1.2/SPM2/PLAI[2] 32 32 31 P1.1/SPM1/PLAI[1] 33 33 32 P1.0/T1/SPM0/PLAI[0] 34 ‒ ‒ P4.2/PLAO[10] 35 34 33 VREF 36 37 35 36 34 35 AGND AVDD Description Input to the Crystal Oscillator Inverter and Input to the Internal Clock Generator Circuits. Serial Port Multiplexed. General-Purpose Input and Output Port 1.7/UART, SPI/Programmable Logic Array Output Element 0. Serial Port Multiplexed. General-Purpose Input and Output Port 1.6/UART, SPI/Programmable Logic Array Input Element 6. Serial Port Multiplexed. General-Purpose Input and Output Port 1.5/UART, SPI/Programmable Logic Array Input Element 5/External Interrupt Request 3, Active High. Serial Port Multiplexed. General-Purpose Input and Output Port 1.4/UART, SPI/Programmable Logic Array Input Element 4/External Interrupt Request 2, Active High. Serial Port Multiplexed. General-Purpose Input and Output Port 1.3/UART, I2C1/Programmable Logic Array Input Element 3. Serial Port Multiplexed. General-Purpose Input and Output Port 1.2/UART, I2C1/Programmable Logic Array Input Element 2. Serial Port Multiplexed. General-Purpose Input and Output Port 1.1/UART, I2C0/Programmable Logic Array Input Element 1. Serial Port Multiplexed. General-Purpose Input and Output Port 1.0/ Timer1 Input/UART, I2C0/Programmable Logic Array Input Element 0. General-Purpose Input and Output Port 4.2/Programmable Logic Array Output Element 10. 2.5 V Internal Voltage Reference. Must be connected to a 0.47 μF capacitor when using the internal reference. Analog Ground. Ground reference point for the analog circuitry. 3.3 V Analog Power. Rev. A | Page 19 of 92 ADuC7019/20/21/22/24/25/26/27 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 ADC3/CMP1 ADC2/CMP0 ADC1 ADC0 DACV DD AVDD AGND DACGND DAC REF VREF P4.5/PLAO[13] P4.4/PLAO[12] P4.3/PLAO[11] P4.2/PLAO[10] P1.0/T1/SPM0/PLAI[0] P1.1/SPM1/PLAI[1] ADuC7024/ADuC7025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN 1 INDICATOR ADuC7024/ ADuC7025 TOP VIEW (Not to Scale) 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 P1.2/SPM2/PLAI[2] P1.3/SPM3/PLAI[3] P1.4/SPM4/PLAI[4]/IRQ2 P1.5/SPM5/PLAI[5]/IRQ3 P4.1/PLAO[9] P4.0/PLAO[8] IOVDD IOGND P1.6/SPM6/PLAI[6] P1.7/SPM7/PLAO[0] P3.7/PWMSYNC/PLAI[15] P3.6/PWMTRIP/PLAI[14] XCLKI XCLKO P0.7/ECLK/XCLK/SPM8/PLAO[4] P2.0/SPM9/PLAO[5]/CONVSTART 04955-067 TCK TDO IOGND IOVDD LVDD DGND P3.0/PWM0H/PLAI[8] P3.1/PWM0L/PLAI[9] P3.2/PWM1H/PLAI[10] P3.3/PWM1L/PLAI[11] P0.3/TRST/ADC BUSY RST P3.4/PWM2H/PLAI[12] P3.5/PWM2L/PLAI[13] IRQ0/P0.4/PWMTRIP/PLAO[1] IRQ1/P0.5/ADCBUSY/PLAO[2] 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 ADC4 ADC5 ADC6 ADC7 ADC8 ADC9 GNDREF ADCNEG DAC0/ADC12 DAC1/ADC13 TMS TDI P4.6/PLAO[14] P4.7/PLAO[15] BM/P0.0/CMPOUT/PLAI[7] P0.6/T1/MRST/PLAO[3] 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 ADC3/CMP1 ADC2/CMP0 ADC1 ADC0 DACV DD AVDD AGND DACGND DAC REF VREF P4.5/PLAO[13] P4.4/PLAO[12] P4.3/PLAO[11] P4.2/PLAO[10] P1.0/T1/SPM0/PLAI[0] P1.1/SPM1/PLAI[1] Figure 13. ADuC7024/ADuC7025 64-Lead LFCSP_VQ Pin Configuration 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN 1 INDICATOR ADuC7024/ ADuC7025 TOP VIEW (Not to Scale) 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 P1.2/SPM2/PLAI[2] P1.3/SPM3/PLAI[3] P1.4/SPM4/PLAI[4]/IRQ2 P1.5/SPM5/PLAI[5]/IRQ3 P4.1/PLAO[9] P4.0/PLAO[8] IOVDD IOGND P1.6/SPM6/PLAI[6] P1.7/SPM7/PLAO[0] P3.7/PWMSYNC/PLAI[15] P3.6/PWMTRIP/PLAI[14] XCLKI XCLKO P0.7/ECLK/XCLK/SPM8/PLAO[4] P2.0/SPM9/PLAO[5]/CONVSTART Figure 14. ADuC7024/ADuC7025 64-Lead LQFP Pin Configuration Rev. A | Page 20 of 92 04955-068 TCK TDO IOGND IOVDD LVDD DGND P3.0/PWM0H/PLAI[8] P3.1/PWM0L/PLAI[9] P3.2/PWM1H/PLAI[10] P3.3/PWM1L/PLAI[11] P0.3/TRST/ADC BUSY RST P3.4/PWM2H/PLAI[12] P3.5/PWM2L/PLAI[13] IRQ0/P0.4/PWMTRIP/PLAO[1] IRQ1/P0.5/ADCBUSY/PLAO[2] 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 ADC4 ADC5 ADC6 ADC7 ADC8 ADC9 GNDREF ADCNEG DAC0/ADC12 DAC1/ADC13 TMS TDI P4.6/PLAO[14] P4.7/PLAO[15] BM/P0.0/CMPOUT/PLAI[7] P0.6/T1/MRST/PLAO[3] ADuC7019/20/21/22/24/25/26/27 Table 11. Pin Function Descriptions (ADuC7024/ADuC7025 64-Lead CSP and ADuC7024/ADuC7025 64-Lead LQFP) Pin No. 1 2 3 4 5 6 7 Mnemonic ADC4 ADC5 ADC6 ADC7 ADC8 ADC9 GNDREF 8 ADCNEG 9 DAC0/ADC12 10 DAC1/ADC13 11 12 13 14 15 TMS TDI P4.6/PLAO[14] P4.7/PLAO[15] BM/P0.0/CMPOUT/PLAI[7] 16 P0.6/T1/MRST/PLAO[3] 17 18 19 20 21 TCK TDO IOGND IOVDD LVDD 22 23 DGND P3.0/PWM0H/PLAI[8] 24 P3.1/PWM0L/PLAI[9] 25 P3.2/PWM1H/PLAI[10] 26 P3.3/PWM1L/PLAI[11] 27 P0.3/TRST/ADCBUSY 28 29 RST P3.4/PWM2H/PLAI[12] 30 P3.5/PWM2L/PLAI[13] 31 IRQ0/P0.4/PWMTRIP/PLAO[1] 32 IRQ1/P0.5/ADCBUSY/PLAO[2] 33 P2.0/SPM9/PLAO[5]/CONVSTART 34 P0.7/ECLK/XCLK/SPM8/PLAO[4] 35 XCLKO Description Single-Ended or Differential Analog Input 4. Single-Ended or Differential Analog Input 5. Single-Ended or Differential Analog Input 6. Single-Ended or Differential Analog Input 7. Single-Ended or Differential Analog Input 8. Single-Ended or Differential Analog Input 9. Ground Voltage Reference for the ADC. For optimal performance, the analog power supply should be separated from IOGND and DGND. Bias Point or Negative Analog Input of the ADC in Pseudo Differential Mode. Must be connected to the ground of the signal to convert. This bias point must be between 0 V and 1 V. DAC0 Voltage Output/Single-Ended or Differential Analog Input 12. DAC outputs are not present on the ADuC7025. DAC1 Voltage Output/Single-Ended or Differential Analog Input 13. DAC outputs are not present on the ADuC7025. JTAG Test Port Input, Test Mode Select. Debug and download access. JTAG Test Port Input, Test Data In. Debug and download access General-Purpose Input and Output Port 4.6/Programmable Logic Array Output Element 14. General-Purpose Input and Output Port 4.7/Programmable Logic Array Output Element 15. Multifunction I/O Pin. Boot mode. The ADuC7024/ADuC7025 enter download mode if BM is low at reset and executes code if BM is pulled high at reset through a 1 kΩ resistor/General-Purpose Input and Output Port 0.0/Voltage Comparator Output/Programmable Logic Array Input Element 7. Multifunction Pin, Driven Low After Reset. General-Purpose Output Port 0.6/Timer1 Input/Power-On Reset Output/Programmable Logic Array Output Element 3. JTAG Test Port Input, Test Clock. Debug and download access. JTAG Test Port Output, Test Data Out. Debug and download access. Ground for GPIO. Typically connected to DGND. 3.3 V Supply for GPIO and Input of the On-Chip Voltage Regulator. 2.6 V Output of the On-Chip Voltage Regulator. This output must be connected to a 0.47 μF capacitor to DGND only. Ground for Core Logic. General-Purpose Input and Output Port 3.0/PWM Phase 0 High-Side Output/Programmable Logic Array Input Element 8. General-Purpose Input and Output Port 3.1/PWM Phase 0 Low-Side Output/Programmable Logic Array Input Element 9. General-Purpose Input and Output Port 3.2/PWM Phase 1 High-Side Output/Programmable Logic Array Input Element 10. General-Purpose Input and Output Port 3.3/PWM Phase 1 Low-Side Output/Programmable Logic Array Input Element 11. General-Purpose Input and Output Port 0.3/JTAG Test Port Input, Test Reset/ADCBUSY Signal Output. Reset Input, Active Low. General-Purpose Input and Output Port 3.4/PWM Phase 2 High-Side Output/Programmable Logic Array Input 12. General-Purpose Input and Output Port 3.5/PWM Phase 2 Low-Side Output/Programmable Logic Array Input Element 13. Multifunction I/O Pin. External Interrupt Request 0, Active High/General-Purpose Input and Output Port 0.4/PWM Trip External Input/Programmable Logic Array Output Element 1. Multifunction I/O Pin. External Interrupt Request 1, Active High/General-Purpose Input and Output Port 0.5/ADCBUSY Signal Output/Programmable Logic Array Output Element 2. Serial Port Multiplexed. General-Purpose Input and Output Port 2.0/UART/Programmable Logic Array Output Element 5/Start Conversion Input Signal for ADC. Serial Port Multiplexed. General-Purpose Input and Output Port 0.7/Output for External Clock Signal/Input to the Internal Clock Generator Circuits/UART/Programmable Logic Array Output Element 4. Output from the Crystal Oscillator Inverter. Rev. A | Page 21 of 92 ADuC7019/20/21/22/24/25/26/27 Pin No. 36 37 Mnemonic XCLKI P3.6/PWMTRIP/PLAI[14] 38 P3.7/PWMSYNC/PLAI[15] 39 P1.7/SPM7/PLAO[0] 40 P1.6/SPM6/PLAI[6] 41 42 43 44 45 IOGND IOVDD P4.0/PLAO[8] P4.1/PLAO[9] P1.5/SPM5/PLAI[5]/IRQ3 46 P1.4/SPM4/PLAI[4]/IRQ2 47 P1.3/SPM3/PLAI[3] 48 P1.2/SPM2/PLAI[2] 49 P1.1/SPM1/PLAI[1] 50 P1.0/T1/SPM0/PLAI[0] 51 52 53 54 55 P4.2/PLAO[10] P4.3/PLAO[11] P4.4/PLAO[12] P4.5/PLAO[13] VREF 56 57 58 59 60 61 62 63 64 DACREF DACGND AGND AVDD DACVDD ADC0 ADC1 ADC2/CMP0 ADC3/CMP1 Description Input to the Crystal Oscillator Inverter and Input to the Internal Clock Generator Circuits. General-Purpose Input and Output Port 3.6/PWM Safety Cut Off/Programmable Logic Array Input Element 14. General-Purpose Input and Output Port 3.7/PWM Synchronization Input Output/Programmable Logic Array Input Element 15. Serial Port Multiplexed. General-Purpose Input and Output Port 1.7/UART, SPI/Programmable Logic Array Output Element 0. Serial Port Multiplexed. General-Purpose Input and Output Port 1.6/UART, SPI/Programmable Logic Array Input Element 6. Ground for GPIO. Typically connected to DGND. 3.3 V Supply for GPIO and Input of the On-Chip Voltage Regulator. General-Purpose Input and Output Port 4.0/Programmable Logic Array Output Element 8. General-Purpose Input and Output Port 4.1/Programmable Logic Array Output Element 9. Serial Port Multiplexed. General-Purpose Input and Output Port 1.5/UART, SPI/Programmable Logic Array Input Element 5/External Interrupt Request 3, Active High. Serial Port Multiplexed. General-Purpose Input and Output Port 1.4/UART, SPI/Programmable Logic Array Input Element 4/External Interrupt Request 2, Active High. Serial Port Multiplexed. General-Purpose Input and Output Port 1.3/UART, I2C1/Programmable Logic Array Input Element 3. Serial Port Multiplexed. General-Purpose Input and Output Port 1.2/UART, I2C1/Programmable Logic Array Input Element 2. Serial Port Multiplexed. General-Purpose Input and Output Port 1.1/UART, I2C0/Programmable Logic Array Input Element 1. Serial Port Multiplexed. General-Purpose Input and Output Port 1.0/Timer1 Input/UART, I2C0/Programmable Logic Array Input Element 0. General-Purpose Input and Output Port 4.2/Programmable Logic Array Output Element 10. General-Purpose Input and Output Port 4.3/Programmable Logic Array Output Element 11. General-Purpose Input and Output Port 4.4/Programmable Logic Array Output Element 12. General-Purpose Input and Output Port 4.5/Programmable Logic Array Output Element 13. 2.5 V Internal Voltage Reference. Must be connected to a 0.47 μF capacitor when using the internal reference. External Voltage Reference for the DACs. Range: DACGND to DACVDD. Ground for the DAC. Typically connected to AGND. Analog Ground. Ground reference point for the analog circuitry. 3.3 V Analog Power. 3.3 V Power Supply for the DACs. Typically connected to AVDD. Single-Ended or Differential Analog Input 0. Single-Ended or Differential Analog Input 1. Single-Ended or Differential Analog Input 2/Comparator Positive Input. Single-Ended or Differential Analog Input 3/Comparator Negative Input. Rev. A | Page 22 of 92 ADuC7019/20/21/22/24/25/26/27 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 ADC3/CMP1 ADC2/CMP0 ADC1 ADC0 ADC11 DACV DD AVDD AVDD AGND AGND DACGND DACREF VREF REFGND P4.5/AD13/PLAO[13] P4.4/AD12/PLAO[12] P4.3/AD11/PLAO[11] P4.2/AD10/PLAO[10] P1.0/T1/SPM0/PLAI[0] P1.1/SPM1/PLAI[1] ADuC7026/ADuC7027 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 PIN 1 INDICATOR ADuC7026/ ADuC7027 TOP VIEW (Not to Scale) 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 P1.2/SPM2/PLAI[2] P1.3/SPM3/PLAI[3] P1.4/SPM4/PLAI[4]/IRQ2 P1.5/SPM5/PLAI[5]/IRQ3 P4.1/AD9/PLAO[9] P4.0/AD8/PLAO[8] IOVDD IOGND P1.6/SPM6/PLAI[6] P1.7/SPM7/PLAO[0] P2.2/RS/PWM0L/PLAO[7] P2.1/WS/PWM0H/PLAO[6] P2.7/PWM1L/MS3 P3.7/AD7/PWMSYNC /PLAI[15] P3.6/AD6/PWMTRIP/PLAI[14] XCLKI XCLKO P0.7/ECLK/XCLK/SPM8/PLAO[4] P2.0/SPM9/PLAO[5]/CONVSTART IRQ1/P0.5/ADCBUSY /PLAO[2]/MS0 04955-069 P0.6/T1/MRST/PLAO[3]/AE TCK TDO P0.2/PWM2L/BHE IOGND IOVDD LVDD DGND P3.0/AD0/PWM0H/PLAI[8] P3.1/AD1/PWM0L/PLAI[9] P3.2/AD2/PWM1H/PLAI[10] P3.3/AD3/PWM1L/PLAI[11] P2.4/PWM0H/MS0 P0.3/TRST/A16/ADC BUSY P2.5/PWM0L/MS1 P2.6/PWM1H/MS2 RST P3.4/AD4/PWM2H/PLAI[12] P3.5/AD5/PWM2L/PLAI[13] IRQ0/P0.4/PWMTRIP/PLAO[1]/MS1 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 ADC4 ADC5 ADC6 ADC7 ADC8 ADC9 ADC10 GNDREF ADCNEG DAC0/ADC12 DAC1/ADC13 DAC2/ADC14 DAC3/ADC15 TMS TDI P0.1/PWM2H/BLE P2.3/AE P4.6/AD14/PLAO[14] P4.7/AD15/PLAO[15] BM/P0.0/CMPOUT/PLAI[7]/MS2 Figure 15. ADuC7026/ADuC7027 80-Lead LQFP Pin Configuration Table 12. Pin Function Descriptions (ADuC7026/ADuC7027) Pin No. 1 2 3 4 5 6 7 8 Mnemonic ADC4 ADC5 ADC6 ADC7 ADC8 ADC9 ADC10 GNDREF 9 ADCNEG 10 DAC0/ADC12 11 DAC1/ADC13 12 DAC2/ADC14 13 DAC3/ADC15 Description Single-Ended or Differential Analog Input 4. Single-Ended or Differential Analog Input 5. Single-Ended or Differential Analog Input 6. Single-Ended or Differential Analog Input 7. Single-Ended or Differential Analog Input 8. Single-Ended or Differential Analog Input 9. Single-Ended or Differential Analog Input 10. Ground Voltage Reference for the ADC. For optimal performance, the analog power supply should be separated from IOGND and DGND. Bias Point or Negative Analog Input of the ADC in Pseudo Differential Mode. Must be connected to the ground of the signal to convert. This bias point must be between 0 V and 1 V. DAC0 Voltage Output/Single-Ended or Differential Analog Input 12. DAC outputs are not present on the ADuC7027. DAC1 Voltage Output/Single-Ended or Differential Analog Input 13. DAC outputs are not present on the ADuC7027. DAC2 Voltage Output/Single-Ended or Differential Analog Input 14. DAC outputs are not present on the ADuC7027. DAC3 Voltage Output/Single-Ended or Differential Analog Input 15. DAC outputs are not present on the ADuC7027. Rev. A | Page 23 of 92 ADuC7019/20/21/22/24/25/26/27 Pin No. 14 15 16 Mnemonic TMS TDI P0.1/PWM2H/BLE 17 18 P2.3/AE P4.6/AD14/PLAO[14] 19 P4.7/AD15/PLAO[15] 20 BM/P0.0/CMPOUT/PLAI[7]/MS2 21 P0.6/T1/MRST/PLAO[3]/AE 22 23 24 TCK TDO P0.2/ PWM2L/BHE 25 26 27 IOGND IOVDD LVDD 28 29 DGND P3.0/AD0/PWM0H/PLAI[8] 30 P3.1/AD1/PWM0L/PLAI[9] 31 P3.2/AD2/PWM1H/PLAI[10] 32 P3.3/AD3/PWM1L/PLAI[11] 33 P2.4/PWM0H/MS0 34 P0.3/TRST/A16/ADCBUSY 35 P2.5/PWM0L/MS1 36 P2.6/PWM1H/MS2 37 38 RST P3.4/AD4/PWM2H/PLAI[12] 39 P3.5/AD5/PWM2L/PLAI[13] 40 IRQ0/P0.4/PWMTRIP/PLAO[1]/MS1 41 IRQ1/P0.5/ADCBUSY/PLAO[2]/MS0 42 P2.0/SPM9/PLAO[5]/CONVSTART Description JTAG Test Port Input, Test Mode Select. Debug and download access. JTAG Test Port Input, Test Data In. Debug and download access. General-Purpose Input and Output Port 0.1/PWM Phase 2 High-Side Output/External Memory Byte Low Enable. General-Purpose Input and Output Port 2.3/External Memory Access Enable. General-Purpose Input and Output Port 4.6/External Memory Interface/Programmable Logic Array Output Element 14. General-Purpose Input and Output Port 4.7/External Memory Interface/Programmable Logic Array Output Element 15. Multifunction I/O Pin. Boot Mode. The ADuC7026/ADuC7027 enter UART download mode if BM is low at reset and execute code if BM is pulled high at reset through a 1 kΩ resistor/ General-Purpose Input and Output Port 0.0/Voltage Comparator Output/Programmable Logic Array Input Element 7/External Memory Select 2. Multifunction Pin, Driven Low After Reset. General-Purpose Output Port 0.6/Timer1 Input/Power-On Reset Output/Programmable Logic Array Output Element 3. JTAG Test Port Input, Test Clock. Debug and download access. JTAG Test Port Output, Test Data Out. Debug and download access. General-Purpose Input and Output Port 0.2/PWM Phase 2 Low-Side Output/External Memory Byte High Enable. Ground for GPIO. Typically connected to DGND. 3.3 V Supply for GPIO and Input of the On-Chip Voltage Regulator. 2.6 V Output of the On-Chip Voltage Regulator. This output must be connected to a 0.47 μF capacitor to DGND only. Ground for Core Logic. General-Purpose Input and Output Port 3.0/External Memory Interface/PWM Phase 0 HighSide Output/Programmable Logic Array Input Element 8. General-Purpose Input and Output Port 3.1/External Memory Interface/PWM Phase 0 LowSide Output/Programmable Logic Array Input Element 9. General-Purpose Input and Output Port 3.2/External Memory Interface/PWM Phase 1 HighSide Output/Programmable Logic Array Input Element 10. General-Purpose Input and Output Port 3.3/External Memory Interface/PWM Phase 1 LowSide Output/Programmable Logic Array Input Element 11. General-Purpose Input and Output Port 2.4/PWM Phase 0 High-Side Output/External Memory Select 0. General-Purpose Input and Output Port 0.3/JTAG Test Port Input, Test Reset/ADCBUSY Signal Output. General-Purpose Input and Output Port 2.5/PWM Phase 0 Low-Side Output/External Memory Select 1. General-Purpose Input and Output Port 2.6/PWM Phase 1 High-Side Output/External Memory Select 2. Reset Input, Active Low. General-Purpose Input and Output Port 3.4/External Memory Interface/PWM Phase 2 HighSide Output/Programmable Logic Array Input 12. General-Purpose Input and Output Port 3.5/External Memory Interface/PWM Phase 2 LowSide Output/Programmable Logic Array Input Element 13. Multifunction I/O Pin. External Interrupt Request 0, Active High/General-Purpose Input and Output Port 0.4/PWM Trip External Input/Programmable Logic Array Output Element 1/External Memory Select 1. Multifunction I/O Pin. External Interrupt Request 1, Active High/General-Purpose Input and Output Port 0.5/ADCBUSY Signal Output/Programmable Logic Array Output Element 2/External Memory Select 0. Serial Port Multiplexed. General-Purpose Input and Output Port 2.0/UART/Programmable Logic Array Output Element 5/Start Conversion Input Signal for ADC. Rev. A | Page 24 of 92 ADuC7019/20/21/22/24/25/26/27 Pin No. 43 Mnemonic P0.7/ECLK/XCLK/SPM8/ PLAO[4] 44 45 46 XCLKO XCLKI P3.6/AD6/PWMTRIP/PLAI[14] 47 P3.7/AD7/PWMSYNC/PLAI[15] 48 P2.7/PWM1L/MS3 49 P2.1/WS/PWM0H/PLAO[6] 50 P2.2/RS/PWM0L/PLAO[7] 51 P1.7/SPM7/PLAO[0] 52 P1.6/SPM6/PLAI[6] 53 54 55 IOGND IOVDD P4.0/AD8/PLAO[8] 56 P4.1/AD9/PLAO[9] 57 P1.5/SPM5/PLAI[5]/IRQ3 58 P1.4/SPM4/PLAI[4]/IRQ2 59 P1.3/SPM3/PLAI[3] 60 P1.2/SPM2/PLAI[2] 61 P1.1/SPM1/PLAI[1] 62 P1.0/T1/SPM0/PLAI[0] 63 P4.2/AD10/PLAO[10] 64 P4.3/AD11/PLAO[11] 65 P4.4/AD12/PLAO[12] 66 P4.5/AD13/PLAO[13] 67 68 REFGND VREF 69 70 71, 72 73, 74 DACREF DACGND AGND AVDD Description Serial Port Multiplexed. General-Purpose Input and Output Port 0.7/Output for External Clock Signal/Input to the Internal Clock Generator Circuits/UART/Programmable Logic Array Output Element 4. Output from the Crystal Oscillator Inverter. Input to the Crystal Oscillator Inverter and Input to the Internal Clock Generator Circuits. General-Purpose Input and Output Port 3.6/External Memory Interface/PWM Safety Cut Off/Programmable Logic Array Input Element 14. General-Purpose Input and Output Port 3.7/External Memory Interface/PWM Synchronization/Programmable Logic Array Input Element 15. General-Purpose Input and Output Port 2.7/PWM Phase 1 Low-Side Output/External Memory Select 3. General-Purpose Input and Output Port 2.1/External Memory Write Strobe/PWM Phase 0 High-Side Output/Programmable Logic Array Output Element 6. General-Purpose Input and Output Port 2.2/External Memory Read Strobe/PWM Phase 0 LowSide Output/Programmable Logic Array Output Element 7. Serial Port Multiplexed. General-Purpose Input and Output Port 1.7/UART, SPI/Programmable Logic Array Output Element 0. Serial Port Multiplexed. General-Purpose Input and Output Port 1.6/UART, SPI/Programmable Logic Array Input Element 6. Ground for GPIO. Typically connected to DGND. 3.3 V Supply for GPIO and Input of the On-Chip Voltage Regulator. General-Purpose Input and Output Port 4.0/External Memory Interface/Programmable Logic Array Output Element 8. General-Purpose Input and Output Port 4.1/External Memory Interface/Programmable Logic Array Output Element 9. Serial Port Multiplexed. General-Purpose Input and Output Port 1.5/UART, SPI/Programmable Logic Array Input Element 5/External Interrupt Request 3, Active High. Serial Port Multiplexed. General-Purpose Input and Output Port 1.4/UART, SPI/Programmable Logic Array Input Element 4/External Interrupt Request 2, Active High. Serial Port Multiplexed. General-Purpose Input and Output Port 1.3/UART, I2C1/Programmable Logic Array Input Element 3. Serial Port Multiplexed. General-Purpose Input and Output Port 1.2/UART, I2C1/Programmable Logic Array Input Element 2. Serial Port Multiplexed. General-Purpose Input and Output Port 1.1/UART, I2C0/Programmable Logic Array Input Element 1. Serial Port Multiplexed. General-Purpose Input and Output Port 1.0/Timer1 Input/UART, I2C0/Programmable Logic Array Input Element 0. General-Purpose Input and Output Port 4.2/External Memory Interface/Programmable Logic Array Output Element 10. General-Purpose Input and Output Port 4.3/External Memory Interface/Programmable Logic Array Output Element 11. General-Purpose Input and Output Port 4.4/External Memory Interface/Programmable Logic Array Output Element 12. General-Purpose Input and Output Port 4.5/External Memory Interface/Programmable Logic Array Output Element 13. Ground for the Reference. Typically connected to AGND. 2.5 V Internal Voltage Reference. Must be connected to a 0.47 μF capacitor when using the internal reference. External Voltage Reference for the DACs. Range: DACGND to DACVDD. Ground for the DAC. Typically connected to AGND. Analog Ground. Ground reference point for the analog circuitry. 3.3 V Analog Power. Rev. A | Page 25 of 92 ADuC7019/20/21/22/24/25/26/27 Pin No. 75 76 77 78 79 80 Mnemonic DACVDD ADC11 ADC0 ADC1 ADC2/CMP0 ADC3/CMP1 Description 3.3 V Power Supply for the DACs. Typically connected to AVDD. Single-Ended or Differential Analog Input 11. Single-Ended or Differential Analog Input 0. Single-Ended or Differential Analog Input 1. Single-Ended or Differential Analog Input 2/Comparator Positive Input. Single-Ended or Differential Analog Input 3/Comparator Negative Input. Rev. A | Page 26 of 92 ADuC7019/20/21/22/24/25/26/27 TYPICAL PERFORMANCE CHARACTERISTICS 1.0 1.0 fS = 774kSPS fS = 774kSPS 0.8 0.4 0.2 0.2 (LSB) 0.6 0.4 0 0 –0.2 –0.4 –0.4 –0.6 –0.6 04955-075 –0.2 –0.8 0 1000 2000 ADC CODES 3000 –0.8 –1.0 4000 0 Figure 16. Typical INL Error, fS = 774 kSPS 0.6 0.6 0.4 0.4 0.2 0.2 (LSB) 0.8 0 0 –0.2 –0.4 –0.4 –0.6 –0.6 04955-077 –0.2 0 1000 2000 ADC CODES 3000 04955-076 (LSB) 4000 fS = 1MSPS 0.8 –0.8 –0.8 –1.0 4000 0 Figure 17. Typical INL Error, fS = 1 MSPS 1000 2000 ADC CODES 0 0.9 –0.1 0.8 0.7 –0.3 WCP –0.6 (LSB) 0.5 (LSB) –0.5 0 1.0 –0.1 0.9 0.8 WCN 0.6 0.4 –0.3 0.7 –0.4 0.6 –0.5 0.5 WCP –0.6 WCN 0.3 –0.7 0.2 –0.9 0.1 2.0 2.5 EXTERNAL REFERENCE (V) 3.0 –1.0 04955-072 –0.8 1.5 4000 –0.2 –0.2 1.0 3000 Figure 20. Typical DNL Error, fS = 1 MSPS 1.0 (LSB) 3000 1.0 fS = 1MSPS 0 2000 ADC CODES Figure 19. Typical DNL Error, fS = 774 kSPS 1.0 –1.0 1000 Figure 18. Typical Worst Case INL Error vs. VREF, fS = 774 kSPS 0.4 –0.7 0.3 –0.8 0.2 –0.9 0.1 –1.0 1.0 1.5 2.0 2.5 EXTERNAL REFERENCE (V) 3.0 0 Figure 21. Typical Worst Case DNL Error vs. VREF, fS = 774 kSPS Rev. A | Page 27 of 92 (LSB) –1.0 04955-071 (LSB) 0.6 04955-074 0.8 ADuC7019/20/21/22/24/25/26/27 75 9000 8000 –76 70 –78 SNR 7000 65 5000 4000 60 –82 THD 55 3000 THD (dB) –80 SNR (dB) FREQUENCY 6000 –84 50 2000 1161 1162 BIN 40 1163 1.0 Figure 22. Code Histogram Plot, fs = 774 kSPS, VIN = 0.7 V 1.5 2.0 2.5 EXTERNAL REFERENCE (V) –88 3.0 04955-070 0 –86 45 04955-073 1000 Figure 25. Typical Dynamic Performance vs. VREF 0 1500 fS = 774kSPS, SNR = 69.3dB, THD = –80.8dB, PHSN = –83.4dB –20 1450 1400 –40 1350 1300 CODE (dB) –60 –80 1250 1200 –100 1150 –120 04955-078 0 100 FREQUENCY (kHz) 1050 1000 –50 200 SNR = 70.4dB, THD = –77.2dB, PHSN = –78.9dB 39.6 –60 39.4 (mA) 39.5 –80 39.3 –100 39.2 –120 39.1 04955-079 (dB) 39.7 –40 –140 0 50 100 FREQUENCY (kHz) 150 39.8 fS = 1MSPS, –160 100 Figure 26. On-Chip Temperature Sensor Voltage Output vs. Temperature 20 –20 50 TEMPERATURE (°C) Figure 23. Dynamic Performance, fS = 774 kSPS 0 0 150 04955-080 –160 04955-060 1100 –140 39.0 38.9 200 Figure 24. Dynamic Performance, fS = 1 MSPS –40 0 25 85 TEMPERATURE (°C) 125 Figure 27. Current Consumption vs. Temperature @ CD = 0 Rev. A | Page 28 of 92 ADuC7019/20/21/22/24/25/26/27 12.05 1.4 12.00 1.2 11.95 1.0 11.90 0.8 (mA) (mA) 11.85 11.80 0.6 11.75 11.70 0.4 11.65 –40 0 25 85 TEMPERATURE (°C) 0 125 Figure 28. Current Consumption vs. Temperature @ CD = 3 04955-083 11.55 0.2 04955-081 11.60 –40 0 25 85 TEMPERATURE (°C) 125 Figure 30. Current Consumption vs. Temperature in Sleep Mode 7.85 37.4 7.80 37.2 7.75 37.0 (mA) 7.65 7.60 7.55 36.8 36.6 7.50 7.45 7.40 –40 0 25 85 TEMPERATURE (°C) 36.2 125 Figure 29. Current Consumption vs. Temperature @ CD = 7 04955-084 36.4 04955-082 (mA) 7.70 62.25 125.00 250.00 500.00 SAMPLING FREQUENCY (kSPS) 1000.00 Figure 31. Current Consumption vs. ADC Speed Rev. A | Page 29 of 92 ADuC7019/20/21/22/24/25/26/27 TERMINOLOGY ADC SPECIFICATIONS Integral Nonlinearity The maximum deviation of any code from a straight line passing through the endpoints of the ADC transfer function. The endpoints of the transfer function are zero scale, a point ½ LSB below the first code transition and full scale, a point ½ LSB above the last code transition. Differential Nonlinearity The difference between the measured and the ideal 1 LSB change between any two adjacent codes in the ADC. The theoretical signal to (noise + distortion) ratio for an ideal N-bit converter with a sine wave input is given by Signal to (Noise + Distortion) = (6.02 N + 1.76) dB Thus, for a 12-bit converter, this is 74 dB. Total Harmonic Distortion The ratio of the rms sum of the harmonics to the fundamental. DAC SPECIFICATIONS Relative Accuracy Otherwise known as endpoint linearity, relative accuracy is a measure of the maximum deviation from a straight line passing through the endpoints of the DAC transfer function. It is measured after adjusting for zero error and full-scale error. Offset Error The deviation of the first code transition (0000 . . . 000) to (0000 . . . 001) from the ideal, that is, +½ LSB. Voltage Output Settling Time The amount of time it takes for the output to settle to within a 1 LSB level for a full-scale input change. Gain Error The deviation of the last code transition from the ideal AIN voltage (full scale − 1.5 LSB) after the offset error has been adjusted out. Signal to (Noise + Distortion) Ratio The measured ratio of signal to (noise + distortion) at the output of the ADC. The signal is the rms amplitude of the fundamental. Noise is the rms sum of all nonfundamental signals up to half the sampling frequency (fS/2), excluding dc. The ratio is dependent upon the number of quantization levels in the digitization process; the more levels, the smaller the quantization noise. Rev. A | Page 30 of 92 ADuC7019/20/21/22/24/25/26/27 OVERVIEW OF THE ARM7TDMI CORE The ARM7® core is a 32-bit reduced instruction set computer (RISC). It uses a single 32-bit bus for instruction and data. The length of the data can be 8 bits, 16 bits, or 32 bits. The length of the instruction word is 32 bits. When a breakpoint or watchpoint is encountered, the processor halts and enters debug state. Once in a debug state, the processor registers can be inspected as well as the Flash/EE, the SRAM, and the memory mapped registers. The ARM7TDMI is an ARM7 core with four additional features: EXCEPTIONS • • • • T support for the thumb (16 bit) instruction set D support for debug M support for long multiplications I includes the embeddedICE module to support embedded system debugging THUMB MODE (T) An ARM instruction is 32 bits long. The ARM7TDMI processor supports a second instruction set that has been compressed into 16 bits, called the thumb instruction set. Faster execution from 16-bit memory and greater code density can usually be achieved by using the thumb instruction set instead of the ARM instruction set, which makes the ARM7TDMI core particularly suitable for embedded applications. However, the thumb mode has two limitations: • • Thumb code usually uses more instructions for the same job. As a result, ARM code is usually best for maximizing the performance of the time-critical code. The thumb instruction set does not include some of the instructions needed for exception handling, which automatically switches the core to ARM code for exception handling. See the ARM7TDMI user guide for details on the core architecture, the programming model, and both the ARM and ARM thumb instruction sets. LONG MULTIPLY (M) The ARM7TDMI instruction set includes four extra instructions that perform 32-bit by 32-bit multiplication with 64-bit result, and 32-bit by 32-bit multiplication-accumulation (MAC) with 64-bit result. These results are achieved in fewer cycles than required on a standard ARM7 core. EMBEDDEDICE (I) EmbeddedICE provides integrated on-chip support for the core. The EmbeddedICE module contains the breakpoint and watchpoint registers that allow code to be halted for debugging purposes. These registers are controlled through the JTAG test port. ARM supports five types of exceptions and a privileged processing mode for each type. The five types of exceptions are: • Normal interrupt or IRQ. This is provided to service general-purpose interrupt handling of internal and external events. • Fast interrupt or FIQ. This is provided to service data transfer or communication channel with low latency. FIQ has priority over IRQ. • Memory abort. • Attempted execution of an undefined instruction. • Software interrupt instruction (SWI). This can be used to make a call to an operating system. Typically, the programmer defines interrupt as IRQ, but for higher priority interrupt, that is, faster response time, the programmer can define interrupt as FIQ. ARM REGISTERS ARM7TDMI has a total of 37 registers: 31 general-purpose registers and six status registers. Each operating mode has dedicated banked registers. When writing user-level programs, 15 general-purpose 32-bit registers (R0 to R14), the program counter (R15) and the current program status register (CPSR) are usable. The remaining registers are only used for system-level programming and for exception handling. When an exception occurs, some of the standard registers are replaced with registers specific to the exception mode. All exception modes have replacement banked registers for the stack pointer (R13) and the link register (R14) as represented in Figure 32. The fast interrupt mode has more registers (R8 to R12) for fast interrupt processing. This means the interrupt processing can begin without the need to save or restore these registers, and thus save critical time in the interrupt handling process. Rev. A | Page 31 of 92 ADuC7019/20/21/22/24/25/26/27 R0 USABLE IN USER MODE R1 INTERRUPT LATENCY SYSTEM MODES ONLY R2 The worst case latency for a fast interrupt request (FIQ) consists of the following: R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R9_FIQ R10_FIQ R11_FIQ R12_FIQ R13_FIQ R14_FIQ R13_SVC R14_SVC R13_ABT R14_ABT R13_IRQ R14_IRQ SPSR_FIQ FIQ MODE SPSR_SVC SVC MODE SPSR_ABT ABORT MODE SPSR_IRQ IRQ MODE SPSR_UND UNDEFINED MODE Figure 32. Register Organization More information relative to the programmer’s model and the ARM7TDMI core architecture can be found in the following documents from ARM: • • • The time for the longest instruction to complete (the longest instruction is an LDM) that loads all the registers including the PC • The time for the data abort entry • The time for FIQ entry R14_UND DDI0029G, ARM7TDMI Technical Reference Manual DDI0100E, ARM Architecture Reference Manual 04955-007 USER MODE The longest time the request can take to pass through the synchronizer R13_UND R15 (PC) CPSR • R8_FIQ At the end of this time, the ARM7TDMI executes the instruction at 0x1C (FIQ interrupt vector address). The maximum total time is 50 processor cycles, which is just under 1.2 μs in a system using a continuous 41.78 MHz processor clock. The maximum interrupt request (IRQ) latency calculation is similar, but must allow for the fact that FIQ has higher priority and could delay entry into the IRQ handling routine for an arbitrary length of time. This time can be reduced to 42 cycles if the LDM command is not used. Some compilers have an option to compile without using this command. Another option is to run the part in thumb mode, where the time is reduced to 22 cycles. The minimum latency for FIQ or IRQ interrupts is a total of five cycles, which consist of the shortest time the request can take through the synchronizer, plus the time to enter the exception mode. Note that the ARM7TDMI always runs in ARM (32-bit) mode when in privileged modes, for example, when executing interrupt service routines. Rev. A | Page 32 of 92 ADuC7019/20/21/22/24/25/26/27 MEMORY ORGANIZATION The ADuC7019/7020/7021/7022/7024/7025/7026/7027 incorporate two separate blocks of memory: 8 kB of SRAM and 64 kB of on-chip Flash/EE memory. Sixty-two kilobytes of onchip Flash/EE memory is available to the user, and the remaining 2 kB are reserved for the factory configured boot page. These two blocks are mapped as shown in Figure 33. FLASH/EE MEMORY The total 64 kB of Flash/EE memory is organized as 32 k × 16 bits (31 k × 16 bits is user space and 1 k × 16 bits is reserved for the on-chip kernel). The page size of this Flash/EE memory is 512 bytes. Sixty-two kilobytes of Flash/EE memory are available to the user as code and nonvolatile data memory. There is no distinction between data and program as ARM code shares the same space. The real width of the Flash/EE memory is 16 bits, which means that in ARM mode (32-bit instruction), two accesses to the Flash/EE are necessary for each instruction fetch. It is therefore recommended to use thumb mode when executing from Flash/EE memory for optimum access speed. The maximum access speed for the Flash/EE memory is 41.78 MHz in thumb mode and 20.89 MHz in full ARM mode. More details about Flash/EE access time are outlined later in the Execution Time from SRAM and Flash/EE section of this data sheet. 0xFFFFFFFF MMRs 0xFFFF0000 RESERVED 0x40000FFFF EXTERNAL MEMORY REGION 3 0x40000000 RESERVED 0x30000FFFF EXTERNAL MEMORY REGION 2 0x30000000 RESERVED 0x20000FFFF EXTERNAL MEMORY REGION 1 0x20000000 RESERVED 0x10000FFFF EXTERNAL MEMORY REGION 0 0x10000000 RESERVED SRAM 0x0008FFFF FLASH/EE 0x00080000 Eight kilobytes of SRAM are available to the user, organized as 2 k × 32 bits, that is, two words. ARM code can run directly from SRAM at 41.78 MHz, given that the SRAM array is configured as a 32-bit wide memory array. More details about SRAM access time are outlined later in the Execution Time from SRAM and Flash/EE section of this datasheet. 0x00011FFF SRAM 0x00010000 0x0000FFFF REMAPPABLE MEMORY SPACE (FLASH/EE OR SRAM) 0x00000000 04955-008 RESERVED Figure 33. Physical Memory Map Note that by default, after a reset, the Flash/EE memory is mirrored at address 0×00000000. It is possible to remap the SRAM at address 0×00000000 by clearing Bit 0 of the REMAP MMR. This remap function is described in more detail in the Flash/EE Memory section. MEMORY ACCESS 32 The ARM7 core sees memory as a linear array of 2 byte location where the different blocks of memory are mapped as outlined in Figure 33. The ADuC7019/7020/7021/7022/7024/7025/7026/7027 memory organizations are configured in little endian format, which means that the least significant byte is located in the lowest byte address, and the most significant byte is in the highest byte address. BIT 31 BIT 0 BYTE 3 . . . BYTE 2 . . . BYTE 1 . . . BYTE 0 . . . B A 9 8 7 6 5 4 0x00000004 3 2 1 0 0x00000000 32 BITS 04955-009 0xFFFFFFFF MEMORY MAPPED REGISTERS The memory mapped register (MMR) space is mapped into the upper two pages of the memory array, and accessed by indirect addressing through the ARM7 banked registers. The MMR space provides an interface between the CPU and all on-chip peripherals. All registers, except the core registers, reside in the MMR area. All shaded locations shown in Figure 35 are unoccupied or reserved locations, and should not be accessed by user software. Table 13 shows the full MMR memory map. The access time for reading from or writing to an MMR depends on the advanced microcontroller bus architecture (AMBA) bus used to access the peripheral. The processor has two AMBA busses: advanced high performance bus (AHB) used for system modules, and advanced peripheral bus (APB) used for lower performance peripheral. Access to the AHB is one cycle, and access to the APB is two cycles. All peripherals on the ADuC7019/7020/7021/7022/7024/7025/7026/7027 are on the APB except the Flash/EE memory, the GPIOs, and the PWM. Figure 34. Little Endian Format Rev. A | Page 33 of 92 ADuC7019/20/21/22/24/25/26/27 0xFFFFFFFF Table 13. Complete MMR List 0xFFFFFC3C PWM Address Name Byte IRQ address base = 0xFFFF0000 0x0000 IRQSTA 4 0x0004 IRQSIG1 4 0x0008 IRQEN 4 0x000C IRQCLR 4 0x0010 SWICFG 4 0x0100 FIQSTA 4 0x0104 FIQSIG1 4 0x0108 FIQEN 4 0x010C FIQCLR 4 0xFFFFFC00 0xFFFFF820 0xFFFFF800 FLASH CONTROL INTERFACE 0xFFFFF46C GPIO 0xFFFFF400 0xFFFF0B54 PLA 0xFFFF0B00 0xFFFF0A14 SPI 0xFFFF0A00 1 0xFFFF0948 Access Type Default Value Page R R R/W W W R R R/W W 0x00000000 0x00XXX000 0x00000000 0x00000000 0x00000000 0x00000000 0x00XXX000 0x00000000 0x00000000 74 74 74 74 75 74 75 75 75 Depends on the level on the external interrupt pins (P0.4, P0.5, P1.4, and P1.5). I2C1 0xFFFF0900 System control address base = 0xFFFF0200 0x0220 REMAP1 1 R/W 0x00 0x0230 RSTSTA 1 R/W 0x01 0x0234 RSTCLR 1 W 0x00 0xFFFF0848 I2C0 0xFFFF0800 0xFFFF0730 UART 1 0xFFFF0700 0xFFFF0620 DAC 0xFFFF0600 0xFFFF0538 ADC 0xFFFF0500 0xFFFF0490 0xFFFF048C 0xFFFF0448 0xFFFF0440 0xFFFF0420 BAND GAP REFERENCE POWER SUPPLY MONITOR PLL AND OSCILLATOR CONTROL 0xFFFF0404 0xFFFF0370 WATCHDOG TIMER 0xFFFF0360 0xFFFF0350 WAKE UP TIMER 0xFFFF0340 0xFFFF0334 GENERAL PURPOSE TIMER 47 47 47 Depends on model. Timer address base = 0xFFFF0300 0x0300 T0LD 2 R/W 0x0304 T0VAL 2 R 0x0308 T0CON 2 R/W 0x030C T0CLRI 1 W 0x0320 T1LD 4 R/W 0x0324 T1VAL 4 R 0x0328 T1CON 2 R/W 0x032C T1CLRI 1 W 0x0330 T1CAP 4 R/W 0x0340 T2LD 4 R/W 0x0344 T2VAL 4 R 0x0348 T2CON 2 R/W 0x034C T2CLRI 1 W 0x0360 T3LD 2 R/W 0x0364 T3VAL 2 R 0x0368 T3CON 2 R/W 0x036C T3CLRI 1 W 0x0000 0xFFFF 0x0000 0xFF 0x00000000 0xFFFFFFFF 0x0000 0xFF 0x00000000 0x00000000 0xFFFFFFFF 0x0000 0xFF 0x0000 0xFFFF 0x0000 0x00 76 76 76 76 76 76 76 77 77 77 77 78 78 78 78 78 79 PLL base address = 0xFFFF0400 0x0404 POWKEY1 2 0x0408 POWCON 2 0x040C POWKEY2 2 0x0410 PLLKEY1 2 0x0414 PLLCON 1 0x0418 PLLKEY2 2 W R/W W W R/W W 0x0000 0x0003 0x0000 0x0000 0x21 0x0000 52 52 52 52 52 52 PSM address base = 0xFFFF0440 0x0440 PSMCON 2 R/W 0x0444 CMPCON 2 R/W 0x0008 0x0000 49 50 Reference address base = 0xFFFF0480 0x048C REFCON 1 R/W 0x00 42 0xFFFF0320 0xFFFF0310 TIMER 0 0xFFFF0300 0xFFFF0220 0xFFFF0110 0xFFFF0000 REMAP AND SYSTEM CONTROL INTERRUPT CONTROLLER 04955-010 0xFFFF0238 Figure 35. Memory Mapped Registers Rev. A | Page 34 of 92 ADuC7019/20/21/22/24/25/26/27 Access Address Name Byte Type ADC address base = 0xFFFF0500 0x0500 ADCCON 2 R/W 0x0504 ADCCP 1 R/W 0x0508 ADCCN 1 R/W 0x050C ADCSTA 1 R 0x0510 ADCDAT 4 R 0x0514 ADCRST 1 R/W 0x0530 ADCGN 2 R/W 0x0534 ADCOF 2 R/W Default Value Page 0x0600 0x00 0x01 0x00 0x00000000 0x00 0x0200 0x0200 39 39 40 40 40 40 40 40 DAC address base = 0xFFFF0600 0x0600 DAC0CON 1 R/W 0x0604 DAC0DAT 4 R/W 0x0608 DAC1CON 1 R/W 0x060C DAC1DAT 4 R/W 0x0610 DAC2CON 1 R/W 0x0614 DAC2DAT 4 R/W 0x0618 DAC3CON 1 R/W 0x061C DAC3DAT 4 R/W 0x00 0x00000000 0x00 0x00000000 0x00 0x00000000 0x00 0x00000000 48 48 48 48 48 48 48 48 UART base address = 0xFFFF0700 0x0700 COMTX 1 R/W COMRX 1 R COMDIV0 1 R/W 0x0704 COMIEN0 1 R/W COMDIV1 1 R/W 0x0708 COMIID0 1 R 0x070C COMCON0 1 R/W 0x0710 COMCON1 1 R/W 0x0714 COMSTA0 1 R 0x0718 COMSTA1 1 R 0x071C COMSCR 1 R/W 0x0720 COMIEN1 1 R/W 0x0724 COMIID1 1 R 0x0728 COMADR 1 R/W 0x072C COMDIV2 2 R/W 0x00 0x00 0x00 0x00 0x00 0x01 0x00 0x00 0x60 0x00 0x00 0x04 0x01 0xAA 0x0000 63 63 63 63 63 63 63 64 64 64 64 65 65 65 64 Access Address Name Byte Type I2C0 base address = 0xFFFF0800 0x0800 I2C0MSTA 1 R 0x0804 I2C0SSTA 1 R 0x0808 I2C0SRX 1 R 0x080C I2C0STX 1 W 0x0810 I2C0MRX 1 R 0x0814 I2C0MTX 1 W 0x0818 I2C0CNT 1 R/W 0x081C I2C0ADR 1 R/W 0x0824 I2C0BYTE 1 R/W 0x0828 I2C0ALT 1 R/W 0x082C I2C0CFG 1 R/W 0x0830 I2C0DIV 2 R/W 0x0838 I2C0ID0 1 R/W 0x083C I2C0ID1 1 R/W 0x0840 I2C0ID2 1 R/W 0x0844 I2C0ID3 1 R/W 0x0848 I2C0CCNT 1 R/W 0x084C I2C0FSTA 2 R Default Value Page 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x1F1F 0x00 0x00 0x00 0x00 0x01 0x0000 68 68 69 69 69 69 69 69 69 69 70 70 70 70 70 70 70 71 I2C1 base address = 0xFFFF0900 0x0900 I2C1MSTA 1 R 0x0904 I2C1SSTA 1 R 0x0908 I2C1SRX 1 R 0x090C I2C1STX 1 W 0x0910 I2C1MRX 1 R 0x0914 I2C1MTX 1 W 0x0918 I2C1CNT 1 R/W 0x091C I2C1ADR 1 R/W 0x0924 I2C1BYTE 1 R/W 0x0928 I2C1ALT 1 R/W 0x092C I2C1CFG 1 R/W 0x0930 I2C1DIV 2 R/W 0x0938 I2C1ID0 1 R/W 0x093C I2C1ID1 1 R/W 0x0940 I2C1ID2 1 R/W 0x0944 I2C1ID3 1 R/W 0x0948 I2C1CCNT 1 R/W 0x094C I2C1FSTA 2 R 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x1F1F 0x00 0x00 0x00 0x00 0x01 0x0000 68 68 69 69 69 69 69 69 69 69 69 70 70 70 70 70 70 70 SPI base address = 0xFFFF0A00 0x0A00 SPISTA 1 0x0A04 SPIRX 1 0x0A08 SPITX 1 0x0A0C SPIDIV 1 0x0A10 SPICON 2 0x00 0x00 0x00 0x1B 0x0000 66 66 66 66 66 Rev. A | Page 35 of 92 R R W R/W R/W ADuC7019/20/21/22/24/25/26/27 Address Name Byte PLA base address = 0xFFFF0B00 0x0B00 PLAELM0 2 0x0B04 PLAELM1 2 0x0B08 PLAELM2 2 0x0B0C PLAELM3 2 0x0B10 PLAELM4 2 0x0B14 PLAELM5 2 0x0B18 PLAELM6 2 0x0B1C PLAELM7 2 0x0B20 PLAELM8 2 0x0B24 PLAELM9 2 0x0B28 PLAELM10 2 0x0B2C PLAELM11 2 0x0B30 PLAELM12 2 0x0B34 PLAELM13 2 0x0B38 PLAELM14 2 0x0B3C PLAELM15 2 0x0B40 PLACLK 1 0x0B44 PLAIRQ 4 0x0B48 PLAADC 4 0x0B4C PLADIN 4 0x0B50 PLADOUT 4 0x0B54 PLALCK 1 Access Type Default Value Page R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R W 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x00 0x00000000 0x00000000 0x00000000 0x00000000 0x00 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 71 72 73 73 73 73 73 External memory base address = 0xFFFFF000 0xF000 XMCFG 1 R/W 0x00 0xF010 XM0CON 1 R/W 0x00 0xF014 XM1CON 1 R/W 0x00 0xF018 XM2CON 1 R/W 0x00 0xF01C XM3CON 1 R/W 0x00 0xF020 XM0PAR 2 R/W 0x70FF 0xF024 XM1PAR 2 R/W 0x70FF 0xF028 XM2PAR 2 R/W 0x70FF 0xF02C XM3PAR 2 R/W 0x70FF 80 80 80 80 80 80 80 80 80 Access Address Name Byte Type GPIO base address = 0xFFFFF400 0xF400 GP0CON 4 R/W 0xF404 GP1CON 4 R/W 0xF408 GP2CON 4 R/W 0xF40C GP3CON 4 R/W 0xF410 GP4CON 4 R/W 0xF420 GP0DAT 4 R/W 0xF424 GP0SET 4 W 0xF428 GP0CLR 4 W 0xF42C GP0PAR 4 W 0xF430 GP1DAT 4 R/W 0xF434 GP1SET 4 W 0xF438 GP1CLR 4 W 0xF43C GP1PAR 4 W 0xF440 GP2DAT 4 R/W 0xF444 GP2SET 4 W 0xF448 GP2CLR 4 W 0xF450 GP3DAT 4 R/W 0xF454 GP3SET 4 W 0xF458 GP3CLR 4 W 0xF45C GP3PAR 4 W 0xF460 GP4DAT 4 R/W 0xF464 GP4SET 4 W 0xF468 GP4CLR 4 W Default Value Page 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x000000XX 0x000000XX 0x000000XX 0x20000000 0x000000XX 0x000000XX 0x000000XX 0x00000000 0x000000XX 0x000000XX 0x000000XX 0x000000XX 0x000000XX 0x000000XX 0x00222222 0x000000XX 0x000000XX 0x000000XX 60 60 60 60 60 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 Flash/EE base address = 0xFFFFF800 0xF800 FEESTA 1 R 0xF804 FEEMOD 2 R/W 0xF808 FEECON 1 R/W 0xF80C FEEDAT 2 R/W 0xF810 FEEADR 2 R/W 0xF818 FEESIGN 3 R 0xF81C FEEPRO 4 R/W 0xF820 FEEHIDE 4 R/W 0x20 0x0000 0x07 0xXXXX 0x0000 0xFFFFFF 0x00000000 0xFFFFFFFF 45 45 45 45 45 45 45 45 PWM base address = 0xFFFFFC00 0xFC00 PWMCON 2 R/W 0xFC04 PWMSTA 2 R/W 0xFC08 PWMDAT0 2 R/W 0xFC0C PWMDAT1 2 R/W 0xFC10 PWMCFG 2 R/W 0xFC14 PWMCH0 2 R/W 0xFC18 PWMCH1 2 R/W 0xFC1C PWMCH2 2 R/W 0xFC20 PWMEN 2 R/W 0xFC24 PWMDAT2 2 R/W 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 59 59 60 60 59 60 60 60 59 60 Rev. A | Page 36 of 92 ADuC7019/20/21/22/24/25/26/27 ADC CIRCUIT OVERVIEW The ADC consists of a 12-bit successive approximation converter based around two capacitor DACs. Depending on the input signal configuration, the ADC can operate in one of three different modes: • Fully differential mode, for small and balanced signals • Single-ended mode, for any single-ended signals • Pseudo differential mode, for any single-ended signals, taking advantage of the common-mode rejection offered by the pseudo differential input The converter accepts an analog input range of 0 to VREF when operating in single-ended mode or pseudo differential mode. In fully differential mode, the input signal must be balanced around a common-mode voltage VCM, in the range 0 V to AVDD, and with a maximum amplitude of 2 VREF (see Figure 36). TRANSFER FUNCTION Pseudo Differential and Single-Ended Modes In pseudo differential or single-ended modes, the input range is 0 V to VREF. The output coding is straight binary in pseudo differential and single-ended modes with 1 LSB = FS/4096, or 2.5 V/4096 = 0.61 mV, or 610 μV when VREF = 2.5 V The ideal code transitions occur midway between successive integer LSB values (that is, 1/2 LSB, 3/2 LSB, 5/2 LSB, … , FS − 3/2 LSB). The ideal input/output transfer characteristic is shown in Figure 37. 1111 1111 1111 1111 1111 1110 1111 1111 1101 OUTPUT CODE The analog-to-digital converter (ADC) incorporates a fast, multichannel, 12-bit ADC. It can operate from 2.7 V to 3.6 V supplies and is capable of providing a throughput of up to 1 MSPS when the clock source is 41.78 MHz. This block provides the user with a multichannel multiplexer, differential track-and-hold, onchip reference, and ADC. 1111 1111 1100 1LSB = FS 4096 0000 0000 0011 0000 0000 0010 0000 0000 0000 AVDD 0V 1LSB VCM VCM 2VREF Fully Differential Mode 04955-011 0 Figure 37. ADC Transfer Function in Pseudo Differential Mode or Single-Ended Mode 2VREF VCM +FS – 1LSB VOLTAGE INPUT 2VREF 04955-012 0000 0000 0001 Figure 36. Examples of Balanced Signals in Fully Differential Mode A high precision, low drift, and factory calibrated 2.5 V reference is provided on-chip. An external reference can also be connected as described later in the Band Gap Reference section. Single or continuous conversion modes can be initiated in the software. An external CONVSTART pin, an output generated from the on-chip PLA, or a Timer0 or Timer1 overflow can also be used to generate a repetitive trigger for ADC conversions. A voltage output from an on-chip band gap reference proportional to absolute temperature can also be routed through the front-end ADC multiplexer, effectively an additional ADC channel input. This facilitates an internal temperature sensor channel, which measures die temperature to an accuracy of ±3°C. The amplitude of the differential signal is the difference between the signals applied to the VIN+ and VIN– pins (that is, VIN+ – VIN–). The maximum amplitude of the differential signal is therefore –VREF to +VREF p-p (that is, 2 × VREF). This is regardless of the common mode (CM). The common mode is the average of the two signals, for example, (VIN+ + VIN–)/2, and is therefore the voltage that the two inputs are centered on. This results in the span of each input being CM ± VREF/2. This voltage has to be set up externally and its range varies with VREF (see the Driving the Analog Inputs section). The output coding is twos complement in fully differential mode with 1 LSB = 2 VREF/4096 or 2 × 2.5 V/4096 = 1.22 mV when VREF = 2.5 V. The designed code transitions occur midway between successive integer LSB values (that is, 1/2 LSB, 3/2 LSB, 5/2 LSB, … , FS – 3/2 LSB). The ideal input/output transfer characteristic is shown in Figure 38. Rev. A | Page 37 of 92 ADuC7019/20/21/22/24/25/26/27 ACQ SIGN BIT 0 1111 1111 1110 OUTPUT CODE 0 1111 1111 1100 BIT TRIAL WRITE 2 × VREF 4096 1LSB = 0 1111 1111 1010 ADC CLOCK 0 0000 0000 0010 CONVSTART 0 0000 0000 0000 1 1111 1111 1110 ADCBUSY 1 0000 0000 0100 DATA 04955-013 ADCDAT 1 0000 0000 0000 0LSB +VREF – 1LSB –VREF + 1LSB VOLTAGE INPUT (VIN+ – VIN–) ADCSTA = 0 Figure 38. ADC Transfer Function in Differential Mode ADCSTA = 1 04955-015 1 0000 0000 0010 ADC INTERRUPT Figure 40. ADC Timing TYPICAL OPERATION ADuC7019 Once configured via the ADC control and channel selection registers, the ADC converts the analog input and provides a 12-bit result in the ADC data register. The top 4 bits are the sign bits. The 12-bit result is placed from Bit 16 to Bit 27 as shown in Figure 39. Again, it should be noted that in fully differential mode, the result is represented in twos complement format, and in pseudo differential and singleended modes, the result is represented in straight binary format. The ADuC7019 is identical to the ADuC7020 except for one buffered ADC channel, ADC3, and it has only three DACs. The output buffer of the fourth DAC is internally connected to the ADC3 channel as shown in Figure 41. ADuC7019 MUX 1MSPS 12-BIT ADC 12-BIT DAC ADC3 16 15 SIGN BITS DAC3 0 12-BIT ADC RESULT ADC15 Figure 41. ADC3 Buffered Input Figure 39. ADC Result Format The same format is used in DAC×DAT, simplifying the software. Current Consumption The ADC in standby mode, that is, powered up but not converting, typically consumes 640 μA. The internal reference adds 140 μA. During conversion, the extra current is 0.3 μA multiplied by the sampling frequency (in kHz). Figure 31 shows the current consumption versus the sampling frequency of the ADC. 04955-016 27 04955-014 31 Note that the DAC3 output pin must be connected to a 10 nF capacitor to AGND. This channel should be used to measure dc voltages only. ADC calibration might be necessary on this channel. MMRS INTERFACE The ADC is controlled and configured via the eight MMRs described in this section. ADCCON Register Timing Figure 40 gives details of the ADC timing. Users have control on the ADC clock speed and on the number of acquisition clocks in the ADCCON MMR. By default, the acquisition time is eight clocks and the clock divider is two. The number of extra clocks (such as bit trial or write) is set to 19, which gives a sampling rate of 774 kSPS. For conversion on temperature sensor, the ADC acquisition time is automatically set to 16 clocks and the ADC clock divider is set to 32. Name ADCCON Address 0xFFFF0500 Default Value 0x0600 Access R/W ADCCON is an ADC control register that allows the programmer to enable the ADC peripheral, select the mode of operation of the ADC (either in single-ended mode, pseudo differential mode, or fully differential mode), and select the conversion type. This MMR is described in Table 14. Rev. A | Page 38 of 92 ADuC7019/20/21/22/24/25/26/27 Table 14. ADCCON MMR Bit Designations ADCCP Register Bit 15:13 12:10 Name ADCCP Value 000 001 010 011 100 101 9:8 00 01 10 11 7 6 5 4:3 00 01 10 11 2:0 000 001 010 011 100 101 Other Description Reserved. ADC clock speed. fADC/1. This divider is provided to obtain 1 MSPS ADC with an external clock <41.78 MHz. fADC/2 (default value). fADC/4. fADC/8. fADC/16. fADC/32. ADC acquisition time. 2 clocks. 4 clocks. 8 clocks (default value). 16 clocks. Enable start conversion. Set by the user to start any type of conversion command. Cleared by the user to disable a start conversion (clearing this bit does not stop the ADC when continuously converting). Enable ADCBUSY. Set by the user to enable the ADCBUSY pin. Cleared by the user to disable the ADCBUSY pin. ADC power control. Set by the user to place the ADC in normal mode (the ADC must be powered up for at least 5 μs before it converts correctly). Cleared by the user to place the ADC in power-down mode. Conversion mode. Single-ended mode. Differential mode. Pseudo differential mode. Reserved. Conversion type. Enable CONVSTART pin as a conversion input. Enable Timer1 as a conversion input. Enable Timer0 as a conversion input. Single software conversion; sets to 000 after conversion (Bit 7 of ADCCON MMR should be cleared after starting a single software conversion to avoid further conversions triggered by the CONVSTART pin). Continuous software conversion. PLA conversion. Reserved. Address 0xFFFF0504 Default Value 0x00 Access R/W ADCCP is an ADC positive channel selection register. This MMR is described in Table 15. Table 15. ADCCP1 MMR Bit Designation Bit 7:5 4:0 Value 00000 00001 00010 00011 00100 00101 00110 00111 01000 01001 01010 01011 01100 01101 01110 01111 10000 10001 10010 10011 Others 1 Description Reserved Positive channel selection bits ADC0 ADC1 ADC2 ADC3 ADC4 ADC5 ADC6 ADC7 ADC8 ADC9 ADC10 ADC11 DAC0/ADC12 DAC1/ADC13 DAC2/ADC14 DAC3/ADC15 Temperature sensor AGND (self-diagnostic feature) Internal reference (self-diagnostic feature) AVDD/2 Reserved ADC and DAC channel availability depends on part model. See the Ordering Guide for details. Rev. A | Page 39 of 92 ADuC7019/20/21/22/24/25/26/27 ADCCN Register Address 0xFFFF0508 Default Value 0x01 Access R/W ADCCN is an ADC negative channel selection register. This MMR is described in Table 16. ADCGN Register Name ADCGN Table 16. ADCCN MMR Bit Designation Bit 7:5 4:0 Value 00000 00001 00010 00011 00100 00101 00110 00111 01000 01001 01010 01011 01100 01101 01110 01111 10000 Others Description Reserved Negative channel selection bits ADC0 ADC1 ADC2 ADC3 ADC4 ADC5 ADC6 ADC7 ADC8 ADC9 ADC10 ADC11 DAC0/ADC12 DAC1/ADC13 DAC2/ADC14 DAC3/ADC15 Internal reference (self-diagnostic feature) Reserved ADCSTA Register Name ADCSTA Address 0xFFFF050C Default Value 0x00 ADCDAT Register Address 0xFFFF0510 Default Value 0x00000000 Access R ADCDAT is an ADC data result register. Hold the 12-bit ADC result as shown in Figure 39. ADCRST Register Name ADCRST Address 0xFFFF0514 Default Value 0x00 Address 0xFFFF0530 Default Value 0x0200 Access R/W Access R/W ADCGN is a 10-bit gain calibration register. ADCOF Register Name ADCOF Address 0xFFFF0534 Default Value 0x0200 Access R/W ADCOF is a 10-bit offset calibration register. CONVERTER OPERATION The ADC incorporates a successive approximation (SAR) architecture involving a charge-sampled input stage. This architecture can operate in three different modes: differential, pseudo differential, and single-ended. Differential Mode The ADuC7019/7020/7021/7022/7024/7025/7026/7027 each contain a successive approximation ADC based on two capacitive DACs. Figure 42 and Figure 43 show simplified schematics of the ADC in acquisition and conversion phase, respectively. The ADC is comprised of control logic, a SAR, and two capacitive DACs. In Figure 42 (the acquisition phase), SW3 is closed and SW1 and SW2 are in Position A. The comparator is held in a balanced condition, and the sampling capacitor arrays acquire the differential signal on the input. Access R ADCSTA is an ADC status register that indicates when an ADC conversion result is ready. The ADCSTA register contains only one bit, ADCReady (Bit 0), representing the status of the ADC. This bit is set at the end of an ADC conversion, generating an ADC interrupt. It is cleared automatically by reading the ADCDAT MMR. When the ADC is performing a conversion, the status of the ADC can be read externally via the ADCBUSY pin. This pin is high during a conversion. When the conversion is finished, ADCBUSY goes back low. This information can be available on P0.5 (see the General-Purpose Input/Output section) if enabled in the ADCCON register. Name ADCDAT ADCRST resets the digital interface of the ADC. Writing any value to this register resets all the ADC registers to their default value. CAPACITIVE DAC CHANNEL+ AIN0 B CS COMPARATOR A SW1 MUX AIN11 CHANNEL– A SW2 CS SW3 CONTROL LOGIC B VREF CAPACITIVE DAC 04955-017 Name ADCCN Figure 42. ADC Acquisition Phase When the ADC starts a conversion, as shown in Figure 43, SW3 opens, and then SW1 and SW2 move to Position B. This causes the comparator to become unbalanced. Both inputs are disconnected once the conversion begins. The control logic and the charge redistribution DACs are used to add and subtract fixed amounts of charge from the sampling capacitor arrays to bring the comparator back into a balanced condition. When the comparator is rebalanced, the conversion is complete. The control logic generates the ADC’s output code. The output impedances of the sources driving the VIN+ and VIN– pins must be matched; otherwise, the two inputs have different settling times, resulting in errors. Rev. A | Page 40 of 92 ADuC7019/20/21/22/24/25/26/27 The capacitors, C1, in Figure 46 are typically 4 pF and can be primarily attributed to pin capacitance. The resistors are lumped components made up of the ON resistance of the switches. The value of these resistors is typically about 100 Ω. The capacitors, C2, are the ADC’s sampling capacitors and typically have a capacitance of 16 pF. CAPACITIVE DAC CS B COMPARATOR A SW1 MUX CHANNEL– A SW2 AIN11 CS SW3 CONTROL LOGIC VREF CAPACITIVE DAC AVDD 04955-018 B D Figure 43. ADC Conversion Phase C1 Pseudo Differential Mode In pseudo differential mode, Channel− is linked to the VIN− pin of the ADuC7019/7020/7021/7022/7024/7025/7026/7027. SW2 switches between A (Channel−) and B (VREF). VIN− pin must be connected to ground or a low voltage. The input signal on VIN+ can then vary from VIN− to VREF + VIN−. Note that VIN− must be chosen so that VREF + VIN− do not exceed AVDD. CHANNEL+ CS B D A AIN11 SW2 CS SW3 CONTROL LOGIC CAPACITIVE DAC 04955-019 VREF CHANNEL– Figure 44. ADC in Pseudo Differential Mode Single-Ended Mode In single-ended mode, SW2 is always connected internally to ground. The VIN− pin can be floating. The input signal range on VIN+ is 0 V to VREF. For ac applications, removing high frequency components from the analog input signal is recommended by using an RC low-pass filter on the relevant analog input pins. In applications where harmonic distortion and signal-to-noise ratio are critical, the analog input should be driven from a low impedance source. Large source impedances significantly affect the ac performance of the ADC. This can necessitate the use of an input buffer amplifier. The choice of the op amp is a function of the particular application. Figure 47 and Figure 48 give an example of ADC front end. ADuC702x 10Ω CAPACITIVE DAC CHANNEL+ AIN0 B CS AIN11 CS ADC0 0.01μF COMPARATOR A SW1 MUX SW3 D Figure 46. Equivalent Analog Input Circuit Conversion Phase: Switches Open; Track Phase: Switches Closed B VIN– R1 C2 04955-021 C1 COMPARATOR A SW1 MUX D AVDD CAPACITIVE DAC AIN0 R1 C2 04955-061 CHANNEL+ AIN0 Figure 47. Buffering Single-Ended/Pseudo Differential Input CONTROL LOGIC CHANNEL– ADuC702x ADC0 04955-020 VREF ADC1 Figure 45. ADC in Single-Ended Mode Analog Input Structure 04955-062 CAPACITIVE DAC Figure 48. Buffering Differential Inputs Figure 46 shows the equivalent circuit of the analog input structure of the ADC. The four diodes provide ESD protection for the analog inputs. Care must be taken to ensure that the analog input signals never exceed the supply rails by more than 300 mV; this would cause these diodes to become forward biased and start conducting into the substrate. These diodes can conduct up to 10 mA without causing irreversible damage to the part. When no amplifier is used to drive the analog input, the source impedance should be limited to values lower than 1 kΩ. The maximum source impedance depends on the amount of total harmonic distortion (THD) that can be tolerated. The THD increases as the source impedance increases and the performance degrades. Rev. A | Page 41 of 92 ADuC7019/20/21/22/24/25/26/27 DRIVING THE ANALOG INPUTS TEMPERATURE SENSOR Internal or external reference can be used for the ADC. In differential mode of operation, there are restrictions on common-mode input signal (VCM), which is dependent on the reference value and supply voltage used to ensure that the signal remains within the supply rails. Table 17 gives some calculated VCM min and VCM max for some conditions. The ADuC7019/7020/7021/7022/7024/7025/7026/7027 provide voltage output from on-chip band gap references proportional to absolute temperature. This voltage output can also be routed through the front-end ADC multiplexer (effectively an additional ADC channel input) facilitating an internal temperature sensor channel, measuring die temperature to an accuracy of ±3°C. Table 17. VCM Ranges AVDD 3.3 V 3.0 V VREF 2.5 V 2.048 V 1.25 V 2.5 V 2.048 V 1.25 V VCM Min 1.25 V 1.024 V 0.75 V 1.25 V 1.024 V 0.75 V VCM Max 2.05 V 2.276 V 2.55 V 1.75 V 1.976 V 2.25 V Signal Peak-to-Peak 2.5 V 2.048 V 1.25 V 2.5 V 2.048 V 1.25 V CALIBRATION By default, the factory set values written to the ADC offset (ADCOF) and gain coefficient registers (ADCGN) yield optimum performance in terms of end-point errors and linearity for standalone operation of the part. (See the Specifications section.) If system calibration is required, it is possible to modify the default offset and gain coefficients to improve end-point errors, but note that any modification to the factory set ADCOF and ADCGN values can degrade ADC linearity performance. For system offset error correction, the ADC channel input stage must be tied to AGND. A continuous software ADC conversion loop must be implemented by modifying the value in ADCOF until the ADC result (ADCDAT) reads code 0 to 1. Offset error correction is done digitally and has a resolution of 0.25 LSB and a range of ±3.125% of VREF. For system gain error correction, the ADC channel input stage must be tied to VREF. A continuous software ADC conversion loop must be implemented to modify the value in ADCOF until the ADC result (ADCDAT) reads code 4094 to 4095. Similar to the offset calibration, the gain calibration resolution is 0.25 LSB with a range of ±3% of VREF. BAND GAP REFERENCE Each ADuC7019/7020/7021/7022/7024/7025/7026/7027 provides an on-chip band gap reference of 2.5 V, which can be used for the ADC and DAC. This internal reference also appears on the VREF pin. When using the internal reference, a 0.47 μF capacitor must be connected from the external VREF pin to AGND to ensure stability and fast response during ADC conversions. This reference can also be connected to an external pin (VREF) and used as a reference for other circuits in the system. An external buffer is required because of the low drive capability of the VREF output. A programmable option also allows an external reference input on the VREF pin. REFCON Register Name REFCON Address 0xFFFF048C Default Value 0x00 Access R/W The band gap reference interface consists of an 8-bit MMR REFCON described in Table 18. Table 18. REFCON MMR Bit Designations Bit 7:2 1 0 Rev. A | Page 42 of 92 Description Reserved. Internal Reference Power-Down Enable. Set by user to place the internal reference in power-down mode and use as an external reference. Cleared by user to place the internal reference in normal mode and use it for ADC conversions. Internal Reference Output Enable. Set by user to connect the internal 2.5 V reference to the VREF pin. The reference can be used for external component but needs to be buffered. Cleared by user to disconnect the reference from the VREF pin. ADuC7019/20/21/22/24/25/26/27 NONVOLATILE FLASH/EE MEMORY Overall, Flash/EE memory represents a step closer to the ideal memory device that includes nonvolatility, in-circuit programmability, high density, and low cost. Incorporated in the ADuC7019/7020/7021/7022/7024/7025/7026/7027, Flash/EE memory technology allows the user to update program code space in-circuit, without the need to replace one time programmable (OTP) devices at remote operating nodes. 600 Each ADuC7019/7020/7021/7022/7024/7025/7026/7027 contains a 64 kB array of Flash/EE memory. The lower 62 kB is available to the user and the upper 2 kB contain permanently embedded firmware, allowing in-circuit serial download. These 2 kB of embedded firmware also contain a power-on configuration routine that downloads factory calibrated coefficients to the various calibrated peripherals (such as ADC, temperature sensor, and band gap references). This 2 kB embedded firmware is hidden from user code. 450 300 150 0 04955-085 Like EEPROM, flash memory can be programmed in-system at a byte level, although it must first be erased. The erase is performed in page blocks. As a result, flash memory is often and more correctly referred to as Flash/EE memory. Retention quantifies the ability of the Flash/EE memory to retain its programmed data over time. Again, the parts is qualified in accordance with the formal JEDEC Retention Lifetime Specification (A117) at a specific junction temperature (TJ = 85°C). As part of this qualification procedure, the Flash/EE memory is cycled to its specified endurance limit, described previously, before data retention is characterized. This means that the Flash/EE memory is guaranteed to retain its data for its fully specified retention lifetime every time the Flash/EE memory is reprogrammed. Also note that retention lifetime, based on an activation energy of 0.6 eV, derates with TJ as shown in Figure 49. RETENTION (Years) The ADuC7019/7020/7021/7022/7024/7025/7026/7027 incorporate Flash/EE memory technology on-chip to provide the user with nonvolatile, in-circuit reprogrammable memory space. 30 40 55 70 85 100 125 JUNCTION TEMPERATURE (°C) 135 150 Figure 49. Flash/EE Memory Data Retention Flash/EE Memory Reliability The Flash/EE memory arrays on the parts is fully qualified for two key Flash/EE memory characteristics: Flash/EE memory cycling endurance and Flash/EE memory data retention. Endurance quantifies the ability of the Flash/EE memory to be cycled through many program, read, and erase cycles. A single endurance cycle is composed of four independent, sequential events, defined as: 1. Initial page erase sequence. 2. Read/verify sequence a single Flash/EE. 3. Byte program sequence memory. 4. Second read/verify sequence endurance cycle. In reliability qualification, every half word (16-bit wide) location of the three pages (top, middle, and bottom) in the Flash/EE memory is cycled 10,000 times from 0x0000 to 0xFFFF. As indicated in Table 1, the parts’ Flash/EE memory endurance qualification is carried out in accordance with JEDEC Retention Lifetime Specification A117 over the industrial temperature range of ---40°C to +25°C and +25°C to +125°C. The results allow the specification of a minimum endurance figure over supply temperature of 10,000 cycles. PROGRAMMING The 62 kB of Flash/EE memory can be programmed in-circuit, using the serial download mode or the JTAG mode provided. Serial Downloading (In-Circuit Programming) The ADuC7019/7020/7021/7022/7024/7025/7026/7027 facilitate code download via the standard UART serial port or via the I2C port. The parts enter serial download mode after a reset or power cycle if the BM pin is pulled low through an external 1 kΩ resistor. Once in serial download mode, the user can download code to the full 62 kB of Flash/EE memory while the device is in-circuit in its target application hardware. An executable PC serial download is provided as part of the development system for serial downloading via the UART. An application note is available at www.analog.com/microconverter describing the protocol for serial downloading via the UART and I2C. JTAG Access The JTAG protocol uses the on-chip JTAG interface to facilitate code download and debug. An application note is available at www.analog.com/microconverter describing the protocol via JTAG. Rev. A | Page 43 of 92 ADuC7019/20/21/22/24/25/26/27 It is possible to write to a single Flash/EE location address twice. If a single address is written to more than twice, then the data within the Flash/EE memory can be corrupted. That is, it is possible to walk zeros only byte wise. FLASH/EE CONTROL INTERFACE Serial, parallel, and JTAG programming use the Flash/EE control interface, which includes eight MMRs outlined in this section. FEESTA Register SECURITY The 62 kB of Flash/EE memory available to the user can be read and write protected. Bit 31 of the FEEPRO/FEEHIDE MMR (see Table 22) protects the 62 kB from being read through JTAG and also in parallel programming mode. The other 31 bits of this register protect writing to the flash memory. Each bit protects four pages, that is, 2 kB. Write protection is activated for all types of access. Name FEESTA • • Protection can be set and removed by writing directly into FEEHIDE MMR. This protection does not remain after reset. Protection can be set by writing into FEEPRO MMR. It only takes effect after a save protection command (0×0C) and a reset. The FEEPRO MMR is protected by a key to avoid direct access. The key is saved once and must be entered again to modify FEEPRO. A mass erase sets the key back to 0×FFFF but also erases all the user code. Flash can be permanently protected by using the FEEPRO MMR and a particular value of key: 0×DEADDEAD. Entering the key again to modify the FEEPRO register is not allowed. 2. 3. 4. 5. Write the bit in FEEPRO corresponding to the page to be protected. Enable key protection by setting Bit 6 of FEEMOD (Bit 5 must equal 0). Write a 32-bit key in FEEADR, FEEDAT. Run the write key command 0×0C in FEECON; wait for the read to be successful by monitoring FEESTA. Reset the part. To remove or modify the protection, the same sequence is used with a modified value of FEEPRO. If the key chosen is the value 0×DEAD, then the memory protection cannot be removed. Only a mass erase unprotects the part, but it also erases all user code. Bit 15:6 5 4 3 2 1 0 FEEPRO=0xFFFFFFFD; FEEMOD=0x48; FEEADR=0x1234; FEEDAT=0x5678; FEECON= 0x0C; //Protect pages 4 to 7 //Write key enable //16 bit key value //16 bit key value // Write key command The same sequence should be followed to protect the part permanently with FEEADR = 0×DEAD and FEEDAT = 0×DEAD. Description Reserved. Burst Command Enable. Set when the command is a burst command: 0x07, 0x08, or 0x09. Cleared when another command. Reserved. Flash Interrupt Status Bit. Set automatically when an interrupt occurs, that is, when a command is complete and the Flash/EE interrupt enable bit in the FEEMOD register is set. Cleared when reading FEESTA register. Flash/EE Controller Busy. Set automatically when the controller is busy. Cleared automatically when the controller is not busy. Command Fail. Set automatically when a command completes unsuccessfully. Cleared automatically when reading FEESTA register. Command Pass. Set by MicroConverter when a command completes successfully. Cleared automatically when reading FEESTA register. FEEMOD Register Name FEEMOD Address 0xFFFFF804 Default Value 0x0000 Access R/W FEEMOD sets the operating mode of the flash control interface. Table 20 shows FEEMOD MMR bit designations. Table 20. FEEMOD MMR Bit Designations Bit 15:9 8 7:5 4 The sequence to write the key is illustrated in the following example (this protects writing Pages 4 to 7 of the Flash): Access R Table 19. FEESTA MMR Bit Designations Sequence to Write the Key 1. Default Value 0x20 FEESTA is a read-only register that reflects the status of the flash control interface as described in Table 19. Three Levels of Protection • Address 0xFFFFF800 3 2:0 Description Reserved. Reserved. This bit should always be set to 0. Reserved. These bits should always be set to 0 except when writing keys. See the Sequence to Write the Key section. Flash/EE Interrupt Enable. Set by user to enable the Flash/EE interrupt. The interrupt occurs when a command is complete. Cleared by user to disable the Flash/EE interrupt. Erase/Write Command Protection. Set by user to enable the erase and write commands. Cleared to protect the Flash against erase/write command. Reserved. These bits should always be set to 0. FEECON Register Name FEECON Rev. A | Page 44 of 92 Address 0xFFFFF808 Default Value 0x07 Access R/W ADuC7019/20/21/22/24/25/26/27 FEECON is an 8-bit command register. The commands are described in Table 21. FEEDAT Register Name FEEDAT Table 21. Command Codes in FEECON Code 0x001 0x011 1 Command Null Single Read 0x02 Single Write 0x031 Erase/Write 0x041 0x051 0x061 Single Verify Single Erase Mass Erase 0x07 Burst Read 0x08 Burst Read/Write Erase Burst Read/Write 0x09 0x0A 0x0B Reserved Signature 0x0C Protect 0x0D 0x0E 0x0F 1 Reserved Reserved Ping Description Idle State. Load FEEDAT with the 16-bit data. Indexed by FEEADR. Write FEEDAT at the address pointed by FEEADR. This operation takes 20 μs. Erase the page indexed by FEEADR and write FEEDAT at the location pointed by FEEADR. This operation takes 20 ms. Compare the contents of the location pointed by FEEADR to the data in FEEDAT. The result of the comparison is returned in FEESTA Bit 1. Erase the page indexed by FEEADR. Erase 62 kB of user space. The 2 kB of kernel are protected. This operation takes 2.48 seconds. To prevent accidental execution, a command sequence is required to execute this instruction. See the Command Sequence for Executing a Mass Erase section. Default Command. No write is allowed. This operation takes two cycles. Write can handle a maximum of 8 data of 16 bits and takes a maximum of 8 x 20 μs. Automatically erases the page indexed by the write; writes pages without running an erase command. This command takes 20 ms to erase the page + 20 μs per data to write. Reserved. Give a signature of the 64 kB of Flash/EE in the 24-bit FEESIGN MMR. This operation takes 32,778 clock cycles. This command can run only once. The value of FEEPRO is saved and removed only with a mass erase (0x06) or the key. Reserved. Reserved. No operation; interrupt generated. Address 0xFFFFF80C Default Value 0xXXXX Access R/W Default Value 0x0000 Access R/W FEEDAT is a 16-bit data register. FEEADR Register Name FEEADR Address 0xFFFFF810 FEEADR is another 16-bit address register. FEESIGN Register Name FEESIGN Address 0xFFFFF818 Default Value 0xFFFFFF Access R FEESIGN is a 24-bit code signature. FEEPRO Register Name FEEPRO Address 0xFFFFF81C Default Value 0x00000000 Access R/W FEEPRO MMR provides immediate protection. It does not require any software keys, see Table 22. FEEHIDE Register Name FEEHIDE Address 0xFFFFF820 Default Value 0xFFFFFFFF Access R/W FEEHIDE provides protection following subsequent reset of the MMR. It requires a software key. See description in Table 22. Table 22. FEEPRO and FEEHIDE MMR Bit Designations Bit 31 30:0 Description Read Protection. Cleared by user to protect all code. Set by user to allow reading the code. Write Protection for Pages 123 to 120, Pages 119 to 116, and Pages 0 to 3. Cleared by user to protect the pages in writing. Set by user to allow writing the pages. Command Sequence for Executing a Mass Erase FEEDAT=0x3CFF; FEEADR = 0xFFC3; FEEMOD= FEEMOD|0x8; //Erase key enable FEECON=0x06; //Mass erase command The FEECON register always reads 0x07 immediately after execution of any of these commands. Rev. A | Page 45 of 92 ADuC7019/20/21/22/24/25/26/27 EXECUTION TIME FROM SRAM AND FLASH/EE RESET AND REMAP Execution from SRAM The ARM exception vectors are all situated at the bottom of the memory array, from address 0x00000000 to address 0x00000020 as shown in Figure 50. Execution from Flash/EE Because the Flash/EE width is 16 bits and access time for 16-bit words is 22 ns, execution from Flash/EE cannot be done in one cycle (as can be done from SRAM when CD Bit = 0). Also, some dead times are needed before accessing data for any value of CD bits. In ARM mode, where instructions are 32 bits, two cycles are needed to fetch any instruction when CD = 0. In thumb mode, where instructions are 16 bits, one cycle is needed to fetch any instruction. Timing is identical in both modes when executing instructions that involve using the Flash/EE for data memory. If the instruction to be executed is a control flow instruction, an extra cycle is needed to decode the new address of the program counter and then four cycles are needed to fill the pipeline. A data-processing instruction involving only the core register does not require any extra clock cycle. However, if it involves data in Flash/EE, an extra clock cycle is needed to decode the address of the data, and two cycles are needed to get the 32-bit data from Flash/EE. An extra cycle must also be added before fetching another instruction. Data transfer instructions are more complex and are summarized in Table 23. Table 23. Execution Cycles in ARM/Thumb Mode Instructions LD1 LDH LDM/PUSH STR1 STRH STRM/POP 1 Fetch Cycles 2/1 2/1 2/1 2/1 2/1 2/1 Dead Time 1 1 N2 1 1 N1 Data Access 2 1 2 x N2 2 x 20 μs 20 μs 2 x N x 20 μs1 Dead Time 1 1 N1 1 1 N1 0xFFFFFFFF KERNEL 0x0008FFFF FLASH/EE INTERRUPT SERVICE ROUTINES 0x00080000 0x00011FFF SRAM INTERRUPT SERVICE ROUTINES 0x00010000 MIRROR SPACE ARM EXCEPTION VECTOR ADDRESSES 0x00000020 0x00000000 0x00000000 04955-022 Fetching instructions from SRAM takes one clock cycle as the access time of the SRAM is 2 ns and a clock cycle is 22 ns minimum. However, if the instruction involves reading or writing data to memory, one extra cycle must be added if the data is in SRAM (or three cycles if the data is in Flash/EE). One cycle to execute the instruction, and two cycles to get the 32-bit data from Flash/EE. A control flow instruction (a branch instruction, for example) takes one cycle to fetch but also takes two cycles to fill the pipeline with the new instructions. Figure 50. Remap for Exception Execution By default, and after any reset, the Flash/EE is mirrored at the bottom of the memory array. The remap function allows the programmer to mirror the SRAM at the bottom of the memory array, which facilitates execution of exception routines from SRAM instead of from Flash/EE. This means exceptions are executed twice as fast, being executed in 32-bit ARM mode, and the SRAM being 32-bit wide instead of 16-bit wide Flash/EE memory. Remap Operation When a reset occurs on the ADuC7019/7020/7021/7022/ 7024/7025/7026/7027, execution starts automatically in factory programmed internal configuration code. This kernel is hidden and cannot be accessed by user code. If the ADuC7019/7020/ 7021/7022/7024/7025/7026/7027 are in normal mode (BM pin is high), then they execute the power-on configuration routine of the kernel and then jump to the reset vector address, 0x00000000, to execute the user’s reset exception routine. Because the Flash/EE is mirrored at the bottom of the memory array at reset, the reset interrupt routine must always be written in Flash/EE. The SWAP instruction combines an LD and STR instruction with only one fetch, giving a total of eight cycles plus 40 μs. 2 N is the number of data to load or store in the multiple load/store instruction (1 <N ≤ 16). The remap is done from Flash/EE by setting Bit 0 of the REMAP register. Precaution must be taken to execute this command from Flash/EE, above address 0x00080020, and not from the bottom of the array as this is replaced by the SRAM. This operation is reversible. The Flash/EE can be remapped at address 0x00000000 by clearing Bit 0 of the REMAP MMR. Precaution must again be taken to execute the remap function from outside the mirrored area. Any type of reset remaps the Flash/EE memory at the bottom of the array. Rev. A | Page 46 of 92 ADuC7019/20/21/22/24/25/26/27 Reset Operation RSTSTA Register There are four kinds of reset: external, power-on, watchdog expiation, and software force. The RSTSTA register indicates the source of the last reset, and RSTCLR allows clearing the RSTSTA register. These registers can be used during a reset exception service routine to identify the source of the reset. If RSTSTA is null, the reset is external. Name RSTSTA REMAP Register Name REMAP 1 Address 0xFFFF0220 Default Value 0xXX1 Access R/W Bit 7:3 2 1 0 Table 24. REMAP MMR Bit Designations Name 3 2:1 0 Remap Description Read-Only Bit. Indicates the size of the Flash/EE memory available. If this bit is set, only 32 kB of Flash/EE memory is available. Read-Only Bit. Indicates the size of the SRAM memory available. If this bit is set, only 4 kB of SRAM is available. Reserved. Remap Bit. Set by user to remap the SRAM to address 0x00000000. Cleared automatically after reset to remap the Flash/EE memory to address 0x00000000. Default Value 0x01 Access R/W Table 25. RSTSTA MMR Bit Designations Depends on model. Bit 4 Address 0xFFFF0230 Description Reserved. Software Reset. Set by user to force a software reset. Cleared by setting the corresponding bit in RSTCLR. Watchdog Timeout. Set automatically when a watchdog timeout occurs. Cleared by setting the corresponding bit in RSTCLR. Power-On Reset. Set automatically when a power-on reset occurs. Cleared by setting the corresponding bit in RSTCLR. RSTCLR Register Name RSTCLR Rev. A | Page 47 of 92 Address 0xFFFF0234 Default Value 0x00 Access R/W ADuC7019/20/21/22/24/25/26/27 OTHER ANALOG PERIPHERALS DAC DACxDAT Registers The ADuC7019/7020/7021/7022/7024/7025/7026/7027 incorporate two, three, or four 12-bit voltage output DACs onchip depending on the model. Each DAC has a rail-to-rail voltage output buffer capable of driving 5 kΩ/100 pF. Name DAC0DAT DAC1DAT DAC2DAT DAC3DAT Each DAC has three selectable ranges: 0 V to VREF (internal band gap 2.5 V reference), 0 V to DACREF, and 0 V to AVDD. DACREF is equivalent to an external reference for the DAC. The signal range is 0 V to AVDD. Each DAC is configurable independently through a control register and a data register. These two registers are identical for the four DACs. Only DAC0CON (see Table 26) and DAC0DAT (see Table 27) are described in detail in this section. DACxCON Registers Address 0xFFFF0600 0xFFFF0608 0xFFFF0610 0xFFFF0618 Default Value 0x00 0x00 0x00 0x00 Default Value 0x00000000 0x00000000 0x00000000 0x00000000 Access R/W R/W R/W R/W Table 27. DAC0DAT MMR Bit Designations MMRs Interface Name DAC0CON DAC1CON DAC2CON DAC3CON Address 0xFFFF0604 0xFFFF060C 0xFFFF0614 0xFFFF061C Access R/W R/W R/W R/W Bit 31:28 27:16 15:0 Description Reserved 12-bit data for DAC0 Reserved Using the DACs The on-chip DAC architecture consists of a resistor string DAC followed by an output buffer amplifier, the functional equivalent of which is shown in Figure 51. AVDD VREF DACREF R OUTPUT BUFFER BYPASSED FROM MCU R DAC0 Table 26. DAC0CON MMR Bit Designations Value Name DACCLK 4 DACCLR 3 2 1:0 00 01 10 11 Description Reserved. DAC Update Rate. Set by user to update the DAC using Timer1. Cleared by user to update the DAC using HCLK (core clock). DAC Clear Bit. Set by user to enable normal DAC operation. Cleared by user to reset data register of the DAC to zero. Reserved. This bit should be left at 0. Reserved. This bit should be left at 0. DAC Range Bits. Power-Down Mode. The DAC output is in tri-state. 0 − DACREF Range. 0 − VREF (2.5 V) Range. 0 − AVDD Range. R R 04955-023 Bit 6 5 R Figure 51. DAC Structure As illustrated in Figure 51, the reference source for each DAC is user selectable in software. It can be either AVDD, VREF, or DACREF. In 0-to-AVDD mode, the DAC output transfer function spans from 0 V to the voltage at the AVDD pin. In 0-to-DACREF mode, the DAC output transfer function spans from 0 V to the voltage at the DACREF pin. In 0-to-VREF mode, the DAC output transfer function spans from 0 V to the internal 2.5 V reference, VREF. The DAC output buffer amplifier features a true rail-to-rail output stage implementation. This means that, unloaded, each output is capable of swinging to within less than 5 mV of both AVDD and ground. Moreover, the DAC’s linearity specification (when driving a 5 kΩ resistive load to ground) is guaranteed through the full transfer function except codes 0 to 100, and, in 0-to-AVDD mode only, codes 3995 to 4095. Rev. A | Page 48 of 92 ADuC7019/20/21/22/24/25/26/27 Linearity degradation near ground and VDD is caused by saturation of the output amplifier, and a general representation of its effects (neglecting offset and gain error) is illustrated in Figure 52. The dotted line in Figure 52 indicates the ideal transfer function, and the solid line represents what the transfer function might look like with endpoint nonlinearities due to saturation of the output amplifier. Note that Figure 52 represents a transfer function in 0-to-AVDD mode only. In 0-to-VREF or 0-to-DACREF modes (with VREF < AVDD or DACREF < AVDD), the lower nonlinearity is similar. However, the upper portion of the transfer function follows the “ideal” line right to the end (VREF in this case, not AVDD), showing no signs of endpoint linearity errors. AVDD POWER SUPPLY MONITOR The power supply monitor regulates the IOVDD supply on the ADuC7019/7020/7021/7022/7024/7025/7026/7027. It indicates when the IOVDD supply pin drops below one of two supply trip points. The monitor function is controlled via the PSMCON register. If enabled in the IRQEN or FIQEN register, then the monitor interrupts the core using the PSMI bit in the PSMCON MMR. This bit is immediately cleared once CMP goes high. This monitor function allows the user to save working registers to avoid possible data loss due to the low supply or brown-out conditions. It also ensures that normal code execution does not resume until a safe supply level has been established. PSMCON Register AVDD – 100mV Name PSMCON Address 0xFFFF0440 Default Value 0x0008 Access R/W Table 28. PSMCON MMR Bit Descriptions Bit 3 Name CMP 2 1 TP PSMEN 0 PSMI 0x00000000 0x0FFF0000 04955-024 100mV Figure 52. Endpoint Nonlinearities Due to Amplifier Saturation The endpoint nonlinearities conceptually illustrated in Figure 52 get worse as a function of output loading. Most of the ADuC7019/7020/7021/7022/7024/7025/7026/7027’s data sheet specifications assume a 5 kΩ resistive load to ground at the DAC output. As the output is forced to source or sink more current, the nonlinear regions at the top or bottom (respectively) of Figure 52 become larger. With larger current demands, this can significantly limit output voltage swing. Rev. A | Page 49 of 92 Description Comparator Bit. This is a read-only bit and directly reflects the state of the comparator. Read 1 indicates that the IOVDD supply is above its selected trip point or the PSM is in powerdown mode. Read 0 indicates the IOVDD supply is below its selected trip point. This bit should be set before leaving the interrupt service routine. Trip Point Selection Bits. 0 = 2.79 V, 1 = 3.07 V. Power Supply Monitor Enable Bit. Set to 1 to enable the power supply monitor circuit. Clear to 0 to disable the power supply monitor circuit. Power Supply Monitor Interrupt Bit. This bit is set high by the MicroConverter once when CMP goes low, indicating low I/O supply. The PSMI bit can be used to interrupt the processor. Once CMP returns high, the PSMI bit can be cleared by writing a 1 to this location. A 0 write has no effect. There is no timeout delay; PSMI can be immediately cleared once CMP goes high. ADuC7019/20/21/22/24/25/26/27 Table 29. CMPCON MMR Bit Descriptions COMPARATOR The ADuC7019/7020/7021/7022/7024/7025/7026/7027 integrate voltage comparators. The positive input is multiplexed with ADC2 and the negative input has two options: ADC3 or DAC0. The output of the comparator can be configured to generate a system interrupt, can be routed directly to the programmable logic array, can start an ADC conversion, or can be on an external pin, CMPOUT, as shown in Figure 53. Bit 15:11 10 CMPIN 00 01 10 11 MUX 7:6 ADC3/CMP1 Name CMPEN 9:8 IRQ ADC2/CMP0 Value CMPOC MUX DAC0 00 01 10 11 04955-025 P0.0/CMPOUT Figure 53. Comparator 5 Hysteresis Figure 54 shows how the input offset voltage and hysteresis terms are defined. Input offset voltage (VOS) is the difference between the center of the hysteresis range and the ground level. This can either be positive or negative. The hysteresis voltage (VH) is ½ the width of the hysteresis range. COMPOUT VH CMPOL 4:3 CMPRES 00 VH VOS COMP0 04955-063 11 2 CMPHYST 1 CMPORI 0 CMPOFI Figure 54. Comparator Hysteresis Transfer Function Comparator Interface The comparator interface consists of a 16-bit MMR, CMPCON, which is described in Table 29. CMPCON Register Name CMPCON Address 0xFFFF0444 Default Value 0x0000 Access R/W Rev. A | Page 50 of 92 Description Reserved. Comparator Enable Bit. Set by user to enable the comparator. Cleared by user to disable the comparator. Comparator Negative Input Select Bits. AVDD/2. ADC3 input. DAC0 output. Reserved. Comparator Output Configuration Bits. Reserved. Reserved. Output on CMPOUT. IRQ. Comparator Output Logic State Bit. When low, the comparator output is high if the positive input (CMP0) is above the negative input (CMP1). When high, the comparator output is high if the positive input is below the negative input. Response Time. 5 μs response time typical for large signals (2.5 V differential). 17 μs response time typical for small signals (0.65 mV differential). 3 μs typical. Comparator Hysteresis Bit. Set by user to have a hysteresis of about 7.5 mV. Cleared by user to have no hysteresis. Comparator Output Rising Edge Interrupt. Set automatically when a rising edge occurs on the monitored voltage (CMP0). Cleared by user by writing a 1 to this bit. Comparator Output Falling Edge Interrupt. Set automatically when a falling edge occurs on the monitored voltage (CMP0). Cleared by user. ADuC7019/20/21/22/24/25/26/27 OSCILLATOR AND PLL—POWER CONTROL External Crystal Selection Clocking System To switch to external crystal, clear the OSEL bit in the PLLCON MMR (see Table 32). In noisy environments, noise might couple to the external crystal pins and PLL could lose lock momentarily. A PLL interrupt is provided in the interrupt controller. The core clock is halted immediately and this interrupt is only serviced once the lock has been restored. Each ADuC7019/7020/7021/7022/7024/7025/7026/7027 integrates a 32.768 kHz ±3% oscillator, a clock divider, and a PLL. The PLL locks onto a multiple (1275) of the internal oscillator or an external 32.768 kHz crystal to provide a stable 41.78 MHz clock for the system referred to as UCLK. To allow power saving, the core can operate at this frequency, or at binary submultiples of it. The actual core operating frequency, UCLK/2CD, is refered to as HCLK. The default core clock is the PLL clock divided by 8 (CD = 3) or 5.22 MHz. The core clock frequency can also come from an external clock on the ECLK pin as described in Figure 55. The core clock can be outputted on the ECLK pin when using an internal oscillator or external crystal. WATCHDOG TIMER INT. 32kHz* OSCILLATOR In case of crystal loss, the watchdog timer should be used. During initialization, a test on the RSTSTA can determine if the reset came from the watchdog timer. External Clock Selection To switch to an external clock on P0.7, configure P0.7 in Mode 1 and MDCLK bits to 11. External clock can be up to 44 MHz providing the tolerance is 1%. Power Control System XCLKO CRYSTAL OSCILLATOR A choice of operating modes is available on the ADuC7019/ 7020/7021/7022/7024/7025/7026/7027. XCLKI WAKEUP TIMER Table 30 describes what part is powered on in the different modes and indicates the power-up time. Table 31 gives some typical values of the total current consumption (analog + digital supply currents) in the different modes depending on the clock divider bits. The ADC is turned off. Note that these values also include current consumption of the regulator and other parts on the test board on which these values are measured. AT POWER UP OCLK 32.768kHz 41.78MHz PLL P0.7/XCLK MDCLK UCLK I2C ANALOG PERIPHERALS /2CD CD CORE *32.768kHz ±3% 04955-026 HCLK P0.7/ECLK Figure 55. Clocking System The selection of the clock source is in the PLLCON register. By default, the part uses the internal oscillator feeding the PLL. Table 30. Operating Modes Mode Active Pause Nap Sleep Stop Core X Peripherals X X PLL X X X XTAL/T2/T3 X X X X IRQ0 to IRQ3 X X X X X Start-up/Power-on Time 130 ms at CD = 0 24 ns at CD = 0; 3 μs at CD = 7 24 ns at CD = 0; 3 μs at CD = 7 1.58 ms 1.7 ms Table 31. Typical Current Consumption at 25°C PC[2-0] 000 001 010 011 100 Mode Active Pause Nap Sleep Stop CD = 0 33.1 22.7 3.8 0.4 0.4 CD = 1 21.2 13.3 3.8 0.4 0.4 CD = 2 13.8 8.5 3.8 0.4 0.4 Rev. A | Page 51 of 92 CD = 3 10 6.1 3.8 0.4 0.4 CD = 4 8.1 4.9 3.8 0.4 0.4 CD = 5 7.2 4.3 3.8 0.4 0.4 CD = 6 6.7 4 3.8 0.4 0.4 CD = 7 6.45 3.85 3.8 0.4 0.4 ADuC7019/20/21/22/24/25/26/27 Table 33. POWCON MMR Bit Designations MMRs and Keys The operating mode, clocking mode, and programmable clock divider are controlled via two MMRs, PLLCON (see Table 32) and POWCON (see Table 33). PLLCON controls the operating mode of the clock system, while POWCON controls the core clock frequency and the power-down mode. Bit 7 6:4 Address 0xFFFF0410 0xFFFF0418 Default Value 0x0000 0x0000 Access W W Others 3 2:0 PLLCON Register Address 0xFFFF0414 Default Value 0x21 Address 0xFFFF0404 0xFFFF040C Default Value 0x0000 0x0000 Access R/W Access W W Address 0xFFFF0408 Default Value 0x0003 Access R/W Table 32. PLLCON MMR Bit Designations Bit 7:6 5 Value Name OSEL 4:2 1:0 MDCLK 00 01 10 11 Description Reserved. Operating Modes. Active Mode. Pause Mode. Nap. Sleep Mode. IRQ0 to IRQ3 and Timer2 can wake up the ADuC7019/7020/7021/7022/7024/ 7025/7026/7027. Stop Mode. IRQ0 to IRQ3 can wake up the ADuC7019/7020/7021/ 7022/7024/7025/7026/7027. Reserved. Reserved. CPU Clock Divider Bits. 41.78 MHz. 20.89 MHz. 10.44 MHz. 5.22 MHz. 2.61 MHz. 1.31 MHz. 653 kHz. 326 kHz. Table 34. PLLCON and POWCON Write Sequence POWCON Register Name POWCON CD 000 001 010 011 100 101 110 111 POWKEYx Registers Name POWKEY1 POWKEY2 PC 100 PLLKEYx Registers Name PLLCON Name 000 001 010 011 To prevent accidental programming, a certain sequence (see Table 34) has to be followed to write to the PLLCON and POWCON registers. Name PLLKEY1 PLLKEY2 Value PLLCON PLLKEY1 = 0xAA PLLCON = 0x01 PLLKEY2 = 0x55 Description Reserved. 32 kHz PLL Input Selection. Set by user to use the internal 32 kHz oscillator. Set by default. Cleared by user to use the external 32 kHz crystal. Reserved. Clocking Modes. Reserved. PLL. Default configuration. Reserved. External Clock on P0.7 Pin. Rev. A | Page 52 of 92 POWCON POWKEY1 = 0x01 POWCON = User Value POWKEY2 = 0xF4 ADuC7019/20/21/22/24/25/26/27 DIGITAL PERIPHERALS THREE-PHASE PWM Each ADuC7019/7020/7021/7022/7024/7025/7026/7027 provides a flexible and programmable, three-phase pulse-width modulation (PWM) waveform generator. It can be programmed to generate the required switching patterns to drive a threephase voltage source inverter for ac induction motor control (ACIM). Note that only active high patterns can be produced. The PWM generator produces three pairs of PWM signals on the six PWM output pins (PWM0H, PWM0L, PWM1H, PWM1L, PWM2H, and PWM2L). The six PWM output signals consist of three high-side drive signals and three low-side drive signals. The switching frequency and dead time of the generated PWM patterns are programmable using the PWMDAT0 and PWMDAT1 MMRs. In addition, three duty-cycle control registers (PWMCH0, PWMCH1, and PWMCH2) directly control the duty cycles of the three pairs of PWM signals. Each of the six PWM output signals can be enabled or disabled by separate output enable bits of the PWMEN register. In addition, three control bits of the PWMEN register permit crossover of the two signals of a PWM pair. In crossover mode, the PWM signal destined for the high-side switch is diverted to the complementary low-side output. The signal destined for the low-side switch is diverted to the corresponding high-side output signal. In many applications, there is a need to provide an isolation barrier in the gate-drive circuits that turn on the power devices of the inverter. In general, there are two common isolation techniques, optical isolation using opto-couplers, and transformer isolation using pulse transformers. The PWM controller permits mixing of the output PWM signals with a high frequency chopping signal to permit easy interface to such pulse transformers. The features of this gate-drive chopping mode can be controlled by the PWMCFG register. An 8-bit value within the PWMCFG register directly controls the chopping frequency. High frequency chopping can be independently enabled for the high-side and low-side outputs using separate control bits in the PWMCFG register. The PWM generator can operate in one of two distinct modes, single update mode or double update mode. In single update mode, the duty cycle values are programmable only once per PWM period, so that the resulting PWM patterns are symmetrical about the midpoint of the PWM period. In the double update mode, a second updating of the PWM duty cycle values is implemented at the midpoint of the PWM period. In double update mode, it is also possible to produce asymmetrical PWM patterns that produce lower harmonic distortion in three-phase PWM inverters. This technique permits closed-loop controllers to change the average voltage applied to the machine windings at a faster rate. As a result, faster closed-loop bandwidths are achieved. The operating mode of the PWM block is selected by a control bit in the PWMCON register. In single update mode, a PWMSYNC pulse is produced at the start of each PWM period. In double update mode, an additional PWMSYNC pulse is produced at the midpoint of each PWM period. The PWM block can also provide an internal synchronization pulse on the PWMSYNC pin that is synchronized to the PWM switching frequency. In single update mode, a pulse is produced at the start of each PWM period. In double update mode, an additional pulse is produced at the mid-point of each PWM period. The width of the pulse is programmable through the PWMDAT2 register. The PWM block can also accept an external synchronization pulse on the PWMSYNC pin. The selection of external synchronization or internal synchronization is in the PWMCON register. The SYNC input timing can be synchronized to the internal peripheral clock, which is selected in the PWMCON register. If the external synchronization pulse from the chip pin is asynchronous to the internal peripheral clock (typical case), the external PWMSYNC is considered asynchronous and should be synchronized. The synchronization logic adds latency and jitter from the external pulse to the actual PWM outputs. The size of the pulse on the PWMSYNC pin must be greater than two core clock periods. The PWM signals produced by the ADuC7019/7020/7021/ 7022/7024/7025/7026/7027 can be shut off via a dedicated asynchronous PWM shutdown pin, PWMTRIP. When brought low, PWMTRIP instantaneously places all six PWM outputs in the off state (high). This hardware shutdown mechanism is asynchronous so that the associated PWM disable circuitry does not go through any clocked logic. This ensures correct PWM shutdown even in the event of a core clock loss. Status information about the PWM system is available to the user in the PWMSTA register. In particular, the state of the PWMTRIP pin is available, as well as a status bit that indicates whether operation is in the first half or the second half of the PWM period. Rev. A | Page 53 of 92 ADuC7019/20/21/22/24/25/26/27 40-Pin Package Devices • The Output Control Unit. This block can redirect the outputs of the three-phase timing unit for each channel to either the high-side or low-side output. In addition, the output control unit allows individual enabling/disabling of each of the six PWM output signals. • The Gate Drive Unit. This block can generate the high frequency chopping frequency and its subsequent mixing with the PWM signals. • The PWM Shutdown Controller. This block takes care of the PWM shutdown via the PWMTRIP pin and generates the correct reset signal for the timing unit. On the 40-pin package devices, the PWM outputs are not directly accessible, as described in the General-Purpose Input/Output section. One channel can be brought out on a GPIO via the PLA as shown in this example: // enables PWM o/p // PWM switching freq // Configure Port Pins GP4CON = 0x300; // P4.2 as PLA output GP3CON = 0x1; // P3.0 configured as // output of PWM0 //(internally) // PWM0 onto P4.2 PLAELM8 = 0x0035; PLAELM10 = 0x0059; The PWMSYNC pulse control unit generates the internal synchronization pulse and also controls whether the external PWMSYNC pin is used or not. // P3.0 (PWM output) // input of element 8 // PWM from element 8 Description of the PWM Block A functional block diagram of the PWM controller is shown in Figure 56. The generation of the six output PWM signals on pins PWM0H to PWM2L is controlled by four important blocks: • The Three-Phase PWM Timing Unit. The core of the PWM controller, it generates three pairs of complemented and deadtime-adjusted, center-based PWM signals. CONFIGURATION REGISTERS DUTY CYCLE REGISTERS PWMCON PWMDAT0 PWMCH0 PWMDAT1 PWMCH1 PWMDAT2 PWMCH2 PWM SHUTDOWN CONTROLLER CORE CLOCK THREE-PHASE PWM TIMING UNIT The PWM controller is driven by the ADuC7019/7020/ 7021/7022/7024/7025/7026/7027 core clock frequency and is capable of generating two interrupts to the ARM core. One interrupt is generated on the occurrence of a PWMSYNC pulse, and the other is generated on the occurrence of any PWM shutdown action. PWMEN PWMCFG OUTPUT CONTROL UNIT GATE DRIVE UNIT PWM0H PWM0L PWM1H PWM1L PWM2H PWM2L SYNC PWMSYNC TO INTERRUPT CONTROLLER PWMTRIP Figure 56. Overview of the PWM Controller Rev. A | Page 54 of 92 04955-027 PWMCON = 0x1; PWMDAT0 = 0x055F; ADuC7019/20/21/22/24/25/26/27 The PWMDAT1 register is a 10-bit register with a maximum value of 0x3FF (= 1023), which corresponds to a maximum programmed dead time of Three-Phase Timing Unit PWM Switching Frequency (PWMDAT0 MMR) The PWM switching frequency is controlled by the PWM period register, PWMDAT0. The fundamental timing unit of the PWM controller is TD(max) = 1023 × 2 × tCORE = 1023 × 2 × 24 ×10–9 = 48.97 μs for a core clock of 41.78 MHz Obviously, the dead time can be programmed to be zero by writing 0 to the PWMDAT1 register. tCORE = 1/fCORE where fCORE is the core frequency of the MicroConverter. PWM Operating Mode (PWMCON, PWMSTA MMRs) Therefore, for a 41.78 MHz fCORE, the fundamental time increment is 24 ns. The value written to the PWMDAT0 register is effectively the number of fCORE clock increments in ½ a PWM period. The required PWMDAT0 value is a function of the desired PWM switching frequency (fPWN) and is given by PWMDAT0 = fCORE/(2 × fPWM) Therefore, the PWM switching period, TS, can be written as As previously discussed, the PWM controller of the ADuC7019/7020/7021/7022/7024/7025/7026/7027 can operate in two distinct modes, single update mode and double update mode. The operating mode of the PWM controller is determined by the state of Bit 2 of the PWMCON register. If this bit is cleared, the PWM operates in the single update mode. Setting Bit 2 places the PWM in the double update mode. The default operating mode is single update mode. TS = 2 × PWMDAT0 × tCORE The largest value that can be written to the 16-bit PWMDAT0 MMR is 0×FFFF = 65535, which corresponds to a minimum PWM switching frequency of fPWM(min) = 41.78 × 106/(2 × 65535) = 318.75 Hz Note that a PWMDAT0 value of 0 and 1 are not defined and should not be used. PWM Switching Dead Time (PWMDAT1 MMR) The second important parameter that must be set up in the initial configuration of the PWM block is the switching dead time. This is a short delay time introduced between turning off one PWM signal (0H, for example) and turning on the complementary signal (0L). This short time delay is introduced to permit the power switch to be turned off (in this case, 0H) to completely recover its blocking capability before the complementary switch is turned on. This time delay prevents a potentially destructive short-circuit condition from developing across the dc link capacitor of a typical voltage source inverter. The dead time is controlled by the 10-bit, read/write PWMDAT1 register. There is only one dead-time register that controls the dead time inserted into all three pairs of PWM output signals. The dead time, TD, is related to the value in the PWMDAT1 register by: TD = PWMDAT1 × 2 × tCORE Therefore, a PWMDAT1 value of 0x00A (= 10), introduces a 426 ns delay between the turn-off on any PWM signal (0H, for example) and the turn-on of its complementary signal (0L). The amount of the dead time can therefore be programmed in increments of 2tCORE (or 49 ns for a 41.78 MHz core clock). In single update mode, a single PWMSYNC pulse is produced in each PWM period. The rising edge of this signal marks the start of a new PWM cycle, and is used to latch new values from the PWM configuration registers (PWMDAT0 and PWMDAT1) and the PWM duty cycle registers (PWMCH0, PWMCH1, and PWMCH2) into the three-phase timing unit. In addition, the PWMEN register is latched into the output control unit on the rising edge of the PWMSYNC pulse. In effect, this means that the characteristics and resulting duty cycles of the PWM signals can be updated only once per PWM period at the start of each cycle. The result is symmetrical PWM patterns about the midpoint of the switching period. In double update mode, there is an additional PWMSYNC pulse produced at the midpoint of each PWM period. The rising edge of this new PWMSYNC pulse is again used to latch new values of the PWM configuration registers, duty cycle registers, and the PWMEN register. As a result, it is possible to alter both the characteristics (switching frequency and dead time) as well as the output duty cycles at the midpoint of each PWM cycle. Consequently, it is also possible to produce PWM switching patterns that are no longer symmetrical about the midpoint of the period (asymmetrical PWM patterns). In double update mode, it may be necessary to know whether operation at any point in time is in either the first half or the second half of the PWM cycle. This information is provided by Bit 0 of the PWMSTA register, which is cleared during operation in the first half of each PWM period (between the rising edge of the original PWMSYNC pulse and the rising edge of the new PWMSYNC pulse introduced in double update mode). Bit 0 of the PWMSTA register is set during operation in the second half of each PWM period. This status bit allows the user to make a determination of the particular half-cycle during implementation of the PWMSYNC interrupt service routine, if required. Rev. A | Page 55 of 92 ADuC7019/20/21/22/24/25/26/27 The advantage of double update mode is that lower harmonic voltages can be produced by the PWM process and faster control bandwidths are possible. However, for a given PWM switching frequency, the PWMSYNC pulses occur at twice the rate in the double update mode. Because new duty cycle values must be computed in each PWMSYNC interrupt service routine, there is a larger computational burden on the ARM core in double update mode. PWM Duty Cycles (PWMCH0, PWMCH1, PWMCH2 MMRs) The duty cycles of the six PWM output signals on Pin PWM0H to Pin PWM2L are controlled by the three, 16-bit read/write duty cycle registers, PWMCH0, PWMCH1, and PWMCH2. The duty cycle registers are programmed in integer counts of the fundamental time unit, tCORE. They define the desired ontime of the high-side PWM signal produced by the three-phase timing unit over half the PWM period. The switching signals produced by the three-phase timing unit are also adjusted to incorporate the programmed dead time value in the PWMDAT1 register. The three-phase timing unit produces active low signals so that a low level corresponds to a command to turn on the associated power device. Both switching edges are moved by an equal amount (PWMDAT1 × tCORE) to preserve the symmetrical output patterns. Also shown is the PWMSYNC pulse and Bit 0 of the PWMSTA register, which indicates whether operation is in the first or second half cycle of the PWM period. The resulting on-times of the PWM signals over the full PWM period (two half periods) produced by the timing unit can be written as follows: On the high side T0HH = PWMDAT0 + 2(PWMCH0 − PWMDAT1) × tCORE T0HL = PWMDAT0 − 2(PWMCH0 − PWMDAT1) × tCORE and the corresponding duty cycles (d) d0H = T0HH/TS = ½ + (PWMCH0 − PWMDAT1)/PWMDAT0 and on the low side T0LH = PWMDAT0 − 2(PWMCH0 + PWMDAT1) × tCORE T0LL = PWMDAT0 + 2(PWMCH0 + PWMDAT1) × tCORE and the corresponding duty cycles (d) dOL = T0LH/TS = ½ − (PWMCH0 + PWMDAT1)/PWMDAT0 Figure 57 shows a typical pair of PWM outputs (in this case, 0H and 0L) from the timing unit in single update mode. All illustrated time values indicate the integer value in the associated register and can be converted to time by simply multiplying by the fundamental time increment, tCORE. Note that the switching patterns are perfectly symmetrical about the midpoint of the switching period in this mode because the same values of PWMCH0, PWMDAT0, and PWMDAT1 are used to define the signals in both half cycles of the period. Figure 57 also demonstrates how the programmed duty cycles are adjusted to incorporate the desired dead time into the resulting pair of PWM signals. Clearly, the dead time is incorporated by moving the switching instants of both PWM signals (0H and 0L) away from the instant set by the PWMCH0 register. –PWMDAT0/2 0 +PWMDAT0/2 0 The minimum permissible T0H and T0L values are zero, corresponding to a 0% duty cycle. In a similar fashion, the maximum value is TS, corresponding to a 100% duty cycle. Figure 58 shows the output signals from the timing unit for operation in double update mode. It illustrates a general case where the switching frequency, dead time, and duty cycle are all changed in the second half of the PWM period. Of course, the same value for any or all of these quantities can be used in both halves of the PWM cycle. However, there is no guarantee that symmetrical PWM signals are produced by the timing unit in double update mode. Figure 58 also shows that the dead time inserted into the PWM signals are done so in the same way as demonstrated in single update mode. –PWMDAT0/2 0 –PWMDAT01/2 –PWMDAT02/2 +PWMDAT01/2 +PWMDAT02/2 0 PWMCH0 PWMCH0 PWMCH01 PWMCH02 0H 2 × PWMDAT1 0H 2 × PWMDAT1 2 × PWMDAT12 2 × PWMDAT11 0L 0L PWMDAT2+1 PWMSYNC PWMSYNC PWMDAT21+1 PWMDAT22+1 PWMDAT0 PWMSTA (0) PWMDAT01 Figure 57. Typical PWM Outputs of Three-Phase Timing Unit in Single Update Mode PWMDAT02 Figure 58. Typical PWM Outputs of the Three-Phase Timing Unit in Double Update Mode Rev. A | Page 56 of 92 04955-029 PWMDAT0 04955-028 PWMSTA (0) ADuC7019/20/21/22/24/25/26/27 In general, the on-times of the PWM signals in double update mode can be defined as follows: On the high side T0HH = (PWMDAT01/2 + PWMDAT02/2 + PWMCH01 + PWMCH02 − PWMDAT11 − PWMDAT12) × tCORE T0HL = (PWMDAT01/2 + PWMDAT02/2 − PWMCH01 − PWMCH02 + PWMDAT11 + PWMDAT12) × tCORE where the subscript 1 refers to the value of that register during the first half cycle, and the subscript 2 refers to the value during the second half cycle. The corresponding duty cycles (d) are d0H = T0HH/TS = (PWMDAT01/2 + PWMDAT02/2 + PWMCH01 + PWMCH02 − PWMDAT11 − PWMDAT12)/ (PWMDAT01+ PWMDAT02) On the low side T0LH = (PWMDAT01/2 + PWMDAT02/2 + PWMCH01 + PWMCH02 + PWMDAT11 + PWMDAT12) × tCORE T0LL = (PWMDAT01/2 + PWMDAT02/2 − PWMCH01 − PWMCH02 − PWMDAT11 − PWMDAT12) × tCORE where the subscript 1 refers to the value of that register during the first half cycle, and the subscript 2 refers to the value during the second half cycle. The corresponding duty cycles (d) are d0L = T0LH/TS = (PWMDAT01/2 + PWMDAT02/2 + PWMCH01 + PWMCH02 + PWMDAT11 + PWMDAT12)/(PWMDAT01 + PWMDAT02) For the completely general case in double update mode (see Figure 58), the switching period is given by TS = (PWMDAT01 + PWMDAT02) × tCORE Again, the values of T0H and T0L are constrained to lie between zero and TS. PWM signals similar to those illustrated in Figure 57 and Figure 58 can be produced on the 1H, 1L, 2H, and 2L outputs by programming the PWMCH1 and PWMCH2 registers in a manner identical to that described for PWMCH0. The PWM controller does not produce any PWM outputs until all of the PWMDAT0, PWMCH0, PWMCH1, and PWMCH2 registers have been written to at least once. Once these registers have been written, internal counting of the timers in the three-phase timing unit is enabled. Writing to the PWMDAT0 register starts the internal timing of the main PWM timer. Provided that the PWMDAT0 register is written to prior to the PWMCH0, PWMCH1, and PWMCH2 registers in the initialization, the first PWMSYNC pulse and interrupt (if enabled) appear 1.5 × tCORE × PWMDAT0 seconds after the initial write to the PWMDAT0 register in single update mode. In double update mode, the first PWMSYNC pulse appears after PWMDAT0 × tCORE seconds. Output Control Unit The operation of the output control unit is controlled by the 9-bit read/write PWMEN register. This register controls two distinct features of the output control unit that are directly useful in the control of electronic counter measures (ECM) or binary decimal counter measures (BDCM). The PWMEN register contains three crossover bits, one for each pair of PWM outputs. Setting Bit 8 of the PWMEN register enables the crossover mode for the 0H/0L pair of PWM signals, setting Bit 7 enables crossover on the 1H/1L pair of PWM signals, and setting Bit 6 enables crossover on the 2H/2L pair of PWM signals. If crossover mode is enabled for any pair of PWM signals, the high-side PWM signal from the timing unit (0H, for example) is diverted to the associated low-side output of the output control unit so that the signal ultimately appears at the PWM0L pin. Of course, the corresponding low-side output of the timing unit is also diverted to the complementary high-side output of the output control unit so that the signal appears at the PWM0H pin. Following a reset, the three crossover bits are cleared and the crossover mode is disabled on all three pairs of PWM signals. The PWMEN register also contains 6 bits (Bit 0 to Bit 5) that can be used to individually enable or disable each of the six PWM outputs. If the associated bit of the PWMEN register is set, the corresponding PWM output is disabled regardless of corresponding value of the duty cycle register. This PWM output signal remains in the off state as long as the corresponding enable/disable bit of the PWMEN register is set. The implementation of this output enable function is implemented after the crossover function. Following a reset, all six enable bits of the PWMEN register are cleared, and all PWM outputs are enabled by default. In a manner identical to the duty cycle registers, the PWMEN is latched on the rising edge of the PWMSYNC signal. As a result, changes to this register only become effective at the start of each PWM cycle in single update mode. In double update mode, the PWMEN register can also be updated at the midpoint of the PWM cycle. In the control of an ECM, only two inverter legs are switched at any time, and often the high-side device in one leg must be switched on at the same time as the low-side driver in a second leg. Therefore, by programming identical duty cycle values for two PWM channels (for example, PWMCH0 = PWMCH1) and setting Bit 7 of the PWMEN register to cross over the 1H/1L pair of PWM signals, it is possible to turn on the high-side switch of Phase A and the low-side switch of Phase B at the same time. In the control of ECM, it is usual for the third inverter leg (Phase C in this example) to be disabled for a number of PWM cycles. This function is implemented by disabling both the 2H and 2L PWM outputs by setting Bit 0 and Bit 1 of the PWMEN register. Rev. A | Page 57 of 92 ADuC7019/20/21/22/24/25/26/27 This situation is illustrated in Figure 59, where it can be seen that both the 0H and 1L signals are identical, because PWMCH0 = PWMCH1 and the crossover bit for phase B is set. PWMCH0 = PWMCH0 = PWMCH1 PWMCH1 fCHOP = fCORE/(4 × (GDCLK + 1)) The GDCLK value can range from 0 to 255, corresponding to a programmable chopping frequency rate from 40.8 kHz to 10.44 MHz for a 41.78 MHz core frequency. The gate drive features must be programmed before operation of the PWM controller and are typically not changed during normal operation of the PWM controller. Following a reset, all bits of the PWMCFG register are cleared so that high frequency chopping is disabled, by default. 0H 2 × PWMDAT1 The chopping frequency is therefore an integral subdivision of the MicroConverter core frequency 2 × PWMDAT1 0L 1H 1L PWMCH0 PWMCH0 2H PWMDAT0 2 × PWMDAT1 Figure 59. Active LO PWM Signals Suitable for ECM Control, PWMCH0 = PWMCH1, Crossover 1H/1L Pair and Disable 0L, 1H, 2H, and 2L Outputs in Single Update Mode. 0H 4 × (GDCLK + 1) × tCORE PWMDAT0 In addition, the other four signals (0L, 1H, 2H, and 2L) have been disabled by setting the appropriate enable/disable bits of the PWMEN register. In Figure 59, the appropriate value for the PWMEN register is 0×00A7. In normal ECM operation, each inverter leg is disabled for certain periods of time so that the PWMEN register is changed based on the position of the rotor shaft (motor commutation). Gate Drive Unit The gate drive unit of the PWM controller adds features that simplify the design of isolated gate-drive circuits for PWM inverters. If a transformer-coupled, power device, gate-drive amplifier is used, then the active PWM signal must be chopped at a high frequency. The 10-bit read/write PWMCFG register programs this high frequency chopping mode. The chopped active PWM signals can be required for the high-side drivers only, the low-side drivers only, or both the high-side and lowside switches. Therefore, independent control of this mode for both high-side and low-side switches is included with two separate control bits in the PWMCFG register. Typical PWM output signals with high frequency chopping enabled on both high-side and low-side signals are shown in Figure 60. Chopping of the high-side PWM outputs (0H, 1H, and 2H) is enabled by setting Bit 8 of the PWMCFG register. Chopping of the low-side PWM outputs (0L, 1L, and 2L) is enabled by setting Bit 9 of the PWMCFG register. The high chopping frequency is controlled by the 8-bit word (GDCLK) placed in Bit 0 to Bit 7 of the PWMCFG register. The period of this high frequency carrier is TCHOP = (4 × (GDCLK + 1)) × tCORE 2 × PWMDAT1 PWMDAT0 04955-031 PWMDAT0 04955-030 0L 2L Figure 60. Typical PWM Signals with High Frequency Gate Chopping Enabled on Both High-Side and Low-Side Switches PWM Shut Down In the event of external fault conditions, it is essential that the PWM system be instantaneously shut down in a safe fashion. A low level on the PWMTRIP pin provides an instantaneous, asynchronous (independent of the MicroConverter core clock) shutdown of the PWM controller. All six PWM outputs are placed in the off state, that is, high state. In addition, the PWMSYNC pulse is disabled. The PWMTRIP pin has an internal pull-down resistor to disable the PWM if the pin becomes disconnected. The state of the PWMTRIP pin can be read from Bit 3 of the PWMSTA register. If a PWM shutdown command occurs, a PWMTRIP interrupt is generated, and internal timing of the three-phase timing unit of the PWM controller is stopped. Following a PWM shutdown, the PWM can only be re-enabled (in a PWMTRIP interrupt service routine, for example) by writing to all of the PWMDAT0, PWMCH0, PWMCH1, and PWMCH2 registers. Provided that the external fault is cleared and the PWMTRIP is returned to a high level, the internal timing of the three-phase timing unit resumes, and new duty-cycle values are latched on the next PWMSYNC boundary. Note that the PWMTRIP interrupt is available in IRQ only, and the PWMSYNC interrupt is available in FIQ only. Both interrupts share the same bit in the interrupt controller. Therefore, only one of the interrupts can be used at once. See the Interrupt System section for further details. Rev. A | Page 58 of 92 ADuC7019/20/21/22/24/25/26/27 PWM MMRs Interface PWMCFG Register The PWM block is controlled via the MMRs described in this section. Name PWMCFG Address 0xFFFFFC00 Default Value 0x0000 Access R/W Table 35. PWMCON MMR Bit Descriptions Bit 7:5 4 Name PWMEN Register 3 PWM_EXTSYNC 2 PWMDBL 1 PWM_SYNC_EN 0 PWMEN Description Reserved. External Sync Select. Set to use external sync. Cleared to use internal sync. External Sync Select. Set to select external synchronous sync signal. Cleared for asynchronous sync signal. Double Update Mode. Set to 1 by user to enable double update mode. Cleared to 0 by the user to enable single update mode. PWM Synchronization Enable. Set by user to enable synchronization. Cleared by user to disable synchronization. PWM Enable Bit. Set to 1 by the user to enable the PWM. Cleared to 0 by the user to disable the PWM. Also cleared automatically with PWMTRIP. PWMSTA Register Name PWMSTA Address 0xFFFFFC04 Default Value 0x0000 Name CHOPLO CHOPHI GDCLK Name PWMEN PWMSYNCINT PWMTRIPINT PWMTRIP PWMPHASE Description Reserved. PWM Sync Interrupt Bit. PWM Trip Interrupt Bit. Raw Signal from the PWMTRIP Pin. Reserved. PWM Phase Bit. Set to 1 by the MicroConverter when the timer is counting down (1st half). Cleared to 0 by the MicroConverter when the timer is counting up (2nd half). Address 0xFFFFFC20 Default Value 0x0000 Access R/W Table 38. PWMEN MMR Bit Descriptions Bit 8 Name 0H0L_XOVR 7 1H1L_XOVR 6 2H2L_XOVR 5 0L_EN 4 0H_EN 3 1L_EN 2 1H_EN 1 2L_EN 0 2H_EN Table 36. PWMSTA MMR Bit Descriptions Name Description Reserved. Low-side gate chopping enable bit. High-side gate chopping enable bit. PWM gate chopping period (unsigned). PWMEN allows enabling channel outputs and crossover. See its bit definitions in Table 38. Access R/W PWMSTA reflects the status of the PWM. Bit 15:10 9 8 3 2:1 0 Access R/W Table 37. PWMCFG MMR Bit Descriptions Bit 15:10 9 8 7:0 PWMCON is a control register that enables the PWM and chooses the update rate. PWM_SYNCSEL Default Value 0x0000 PWMCFG is a gate chopping register. PWMCON Register Name PWMCON Address 0xFFFFFC10 Rev. A | Page 59 of 92 Description Channel 0 Output Crossover Enable Bit. Set to 1 by user to enable Channel 0 output crossover. Cleared to 0 by user to disable Channel 0 output crossover. Channel 1 Output Crossover Enable Bit. Set to 1 by user to enable Channel 1 output crossover. Cleared to 0 by user to disable Channel 1 output crossover. Channel 2 Output Crossover Enable Bit. Set to 1 by user to enable Channel 2 output crossover. Cleared to 0 by user to disable Channel 2 output crossover. 0L Output Enable Bit. Set to 1 by user to disable the 0L output of the PWM. Cleared to 0 by user to enable the 0L output of the PWM. 0H Output Enable Bit. Set to 1 by user to disable the 0H output of the PWM. Cleared to 0 by user to enable the 0H output of the PWM. 1L Output Enable Bit. Set to 1 by user to disable the 1L output of the PWM. Cleared to 0 by user to enable the 1L output of the PWM. 1H Output Enable Bit. Set to 1 by user to disable the 1H output of the PWM. Cleared to 0 by user to enable the 1H output of the PWM. 2L Output Enable Bit. Set to 1 by user to disable the 2L output of the PWM. Cleared to 0 by user to enable the 2L output of the PWM. 2H Output Enable Bit. Set to 1 by user to disable the 2H output of the PWM. Cleared to 0 by user to enable the 2H output of the PWM. ADuC7019/20/21/22/24/25/26/27 PWMDAT0 Register Name PWMDAT0 Address 0xFFFFFC08 Table 39. GPIO Pin Function Descriptions Default Value 0x0000 Access R/W PWMDAT0 is an unsigned 16-bit register for switching period. Port 0 PWMDAT1 Register Name PWMDAT1 Address 0xFFFFFC0C Default Value 0x0000 Access R/W PWMDAT1 is an unsigned 10-bit register for dead time. PWMCHx Registers Name PWMCH0 PWMCH1 PWMCH2 Address 0xFFFFFC14 0xFFFFFC18 0xFFFFFC1C Default Value 0x0000 0x0000 0x0000 Access R/W R/W R/W 1 PWMCH0, PWMCH1, and PWMCH2 are channel duty cycles for the three phases. PWMDAT2 Register Name PWMDAT2 Address 0xFFFFFC24 Default Value 0x0000 Access R/W 2 PWMDAT2 is an unsigned 10-bit register for PWM sync pulse width. GENERAL-PURPOSE INPUT/OUTPUT The ADuC7019/7020/7021/7022/7024/7025/7026/7027 provide 40 general-purpose, bi-directional I/O (GPIO) pins. All I/O pins are 5 V tolerant, which means that the GPIOs support an input voltage of 5 V. In general, many of the GPIO pins have multiple functions (see Table 39 for the pin function definitions). By default, the GPIO pins are configured in GPIO mode. All GPIO pins have an internal pull-up resistor (of about 100 kΩ) and their drive capability is 1.6 mA. Note that a maximum of 20 GPIO can drive 1.6 mA at the same time. The following GPIO have programmable pull up: P0.0, P0.4, P0.5, P0.6, P0.7, and the 8 GPIOs of P1. 3 4 The 40 GPIO are grouped in five ports, Port 0 to Port 4. Each port is controlled by four or five MMRs, x representing the port number. Note that the kernel changes P0.6 from its default configuration at reset (MRST) to GPIO mode. If MRST is used for external circuitry, an external pull-up resistor should be used to ensure that the level on P0.6 does not drop when the kernel switches mode. For example, if MRST is required for power down, it can be reconfigured in GP0CON MMR. The input level of any GPIO can be read at any time in the GPxDAT MMR, even when the pin is configured in a different mode than GPIO. The PLA input are also always active. 1 2 Pin P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 P2.0 P2.1 P2.2 P2.3 P2.4 P2.5 P2.6 P2.7 P3.0 P3.1 P3.2 P3.3 P3.4 P3.5 P3.6 P3.7 P4.0 P4.1 P4.2 P4.3 P4.4 P4.5 P4.6 P4.7 00 GPIO GPIO GPIO GPIO GPIO/IRQ0 GPIO/IRQ1 GPIO/T1 GPIO GPIO/T1 GPIO GPIO GPIO GPIO/IRQ2 GPIO/IRQ3 GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO Configuration 01 10 CMP MS2 PWM2H BLE PWM2L BHE TRST A16 PWMTRIP MS1 ADCBUSY MS0 MRST AE ECLK/XCLK1 SIN SIN SCL0 SOUT SDA0 RTS SCL1 CTS SDA1 RI CLK DCD MISO DSR MOSI DTR CSL SOUT CONVSTART2 PWM0H WS PWM0L RS AE PWM0H MS0 PWM0L MS1 PWM1H MS2 PWM1L MS3 PWM0H AD0 PWM0L AD1 PWM1H AD2 PWM1L AD3 PWM2H AD4 PWM2L AD5 PWMTRIP AD6 PWMSYNC AD7 AD8 AD9 AD10 AD11 AD12 AD13 AD14 AD15 11 PLAI[7] ADCBUSY PLAO[1] PLAO[2] PLAO[3] PLAO[4] PLAI[0] PLAI[1] PLAI[2] PLAI[3] PLAI[4] PLAI[5] PLAI[6] PLAO[0] PLAO[5] PLAO[6] PLAO[7] PLAI[8] PLAI[9] PLAI[10] PLAI[11] PLAI[12] PLAI[13] PLAI[14] PLAI[15] PLAO[8] PLAO[9] PLAO[10] PLAO[11] PLAO[12] PLAO[13] PLAO[14] PLAO[15] When configured in Mode 1, P0.7 is ECLK by default, or core clock output. To configure it as a clock input, MDCLK bits in PLLCON must be set to 11. The CONVSTART signal is active in all modes of P2.0. GPxCON Registers Name GP0CON GP1CON GP2CON GP3CON GP4CON Rev. A | Page 60 of 92 Address 0xFFFFF400 0xFFFFF404 0xFFFFF408 0xFFFFF40C 0xFFFFF410 Default Value 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 Access R/W R/W R/W R/W R/W ADuC7019/20/21/22/24/25/26/27 GPxDAT Registers GPxCON are the port x control registers, which select the function of each pin of port x. as described in Table 40. Name GP0DAT GP1DAT GP2DAT GP3DAT GP4DAT Table 40. GPxCON MMR Bit Descriptions Bit 31:30 29:28 27:26 25:24 23:22 21:20 19:18 17:16 15:14 13:12 11:10 9:8 7:6 5:4 3:2 1:0 Description Reserved Select Function of Px.7 Pin Reserved Select Function of Px.6 Pin Reserved Select Function of Px.5 Pin Reserved Select Function of Px.4 Pin Reserved Select Function of Px.3 Pin Reserved Select Function of Px.2 Pin Reserved Select Function of Px.1 Pin Reserved Select Function of Px.0 Pin Address 0xFFFFF420 0xFFFFF430 0xFFFFF440 0xFFFFF450 0xFFFFF460 Default Value 0x000000XX 0x000000XX 0x000000XX 0x000000XX 0x000000XX Access R/W R/W R/W R/W R/W GPxDAT are port x configuration and data registers. They configure the direction of the GPIO pins of port x, set the output value for the pins configured as output, and store the input value of the pins configured as input. Table 42. GPxDAT MMR Bit Descriptions Bit 31:24 23:16 15:8 7:0 Description Direction of the Data. Set to 1 by user to configure the GPIO pin as an output. Cleared to 0 by user to configure the GPIO pin as an input. Port x Data Output. Reflect the State of Port x Pins at Reset (read only). Port x Data Input (read only). GPxSET Registers GPxPAR Registers Name GP0PAR GP1PAR GP3PAR Address 0xFFFFF42C 0xFFFFF43C 0xFFFFF45C Default Value 0x20000000 0x00000000 0x00222222 Access R/W R/W R/W GPxPAR program the parameters for Port 0, Port 1, and Port 3. Note that the GPxDAT MMR must always be written after changing the GPxPAR MMR. Table 41. GPxPAR MMR Bit Descriptions Bit 31:29 28 27:25 24 23:21 20 19:17 16 15:13 12 11:9 8 7:5 4 3:1 0 Description Reserved Pull-Up Disable Px.7 Reserved Pull-Up Disable Px.6 Reserved Pull-Up Disable Px.5 Reserved Pull-Up Disable Px.4 Reserved Pull-Up Disable Px.3 Reserved Pull-Up Disable Px.2 Reserved Pull-Up Disable Px.1 Reserved Pull-Up Disable Px.0 Name GP0SET GP1SET GP2SET GP3SET GP4SET Address 0xFFFFF424 0xFFFFF434 0xFFFFF444 0xFFFFF454 0xFFFFF464 Default Value 0x000000XX 0x000000XX 0x000000XX 0x000000XX 0x000000XX Access W W W W W GPxSET are data set port x registers. Table 43. GPxSET MMR Bit Descriptions Bit 31:24 23:16 15:0 Description Reserved. Data Port x Set Bit. Set to 1 by user to set bit on port x; also sets the corresponding bit in the GPxDAT MMR. Cleared to 0 by user; does not affect the data out. Reserved. GPxCLR Registers Name GP0CLR GP1CLR GP2CLR GP3CLR GP4CLR Address 0xFFFFF428 0xFFFFF438 0xFFFFF448 0xFFFFF458 0xFFFFF468 Default Value 0x000000XX 0x000000XX 0x000000XX 0x000000XX 0x000000XX Access W W W W W GPxCLR are data clear port x registers. Table 44. GPxCLR MMR Bit Descriptions Bit 31:24 23:16 15:0 Rev. A | Page 61 of 92 Description Reserved. Data Port x Clear Bit. Set to 1 by user to clear bit on port x; also clears the corresponding bit in the GPxDAT MMR. Cleared to 0 by user; does not affect the data out. Reserved. ADuC7019/20/21/22/24/25/26/27 SERIAL PORT MUX Baud Rate Generation The serial port mux multiplexes the serial port peripherals (an SPI, UART, and two I2Cs) and the programmable logic array (PLA) to a set of ten GPIO pins. Each pin must be configured to one of its specific I/O functions as described in Table 45. There are two ways of generating the UART baud rate. Pin SPM0 SPM1 SPM2 SPM3 SPM4 SPM5 SPM6 SPM7 SPM8 SPM9 GPIO (00) P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 P0.7 P2.0 UART (01) SIN SOUT RTS CTS RI DCD DSR DTR ECLK/XCLK CONV UART/I2C/SPI (10) I2C0SCL I2C0SDA I2C1SCL I2C1SDA SPICLK SPIMISO SPIMOSI SPICSL SIN SOUT PLA (11) PLAI[0] PLAI[1] PLAI[2] PLAI[3] PLAI[4] PLAI[5] PLAI[6] PLAO[0] PLAO[4] PLAO[5] Table 45 also details the mode for each of the SPMUX GPIO pins. This configuration has to be done via the GP0CON, GP1CON, and GP2CON MMRs. By default these ten pins are configured as GPIOs. Normal 450 UART Baud Rate Generation. The baud rate is a divided version of the core clock using the value in COMDIV0 and COMDIV1 MMRs (16-bit value, DL). Baud rate = Table 47 gives some common baud rate values. Table 47. Baud Rate Using the Normal Baud Rate Generator Baud Rate 9600 CD 0 DL 88 h Actual Baud Rate 9600 % Error 0 19200 0 44 h 19200 0 115200 0 0B h 118691 3 9600 3 11 h 9600 0 19200 3 8h 20400 6.25 115200 3 1h 163200 41.67 2. Using the Fractional Divider. The fractional divider combined with the normal baud rate generator produces a wider range of more accurate baud rates. UART SERIAL INTERFACE The UART peripheral is a full-duplex, universal, asynchronous receiver/transmitter. It is fully compatible with the 16450 serial port standard. The UART performs serial-to-parallel conversion on data characters received from a peripheral device or modem, and parallel-to-serial conversion on data characters received from the CPU. The UART includes a fractional divider for baud rate generation and has a network addressable mode. The UART function is made available on the 10 pins of the ADuC7019/7020/ 7021/7022/7024/7025/7026/7027 (see Table 46). CORE CLOCK Signal SIN SOUT RTS CTS RI DCD DSR DTR SIN SOUT /16DL UART Figure 61. Baud Rate Generation Options Calculation of the baud rate using fractional divider is as follows: 41.78 MHz Baud Rate = 2 M+ Description Serial Receive Data Serial Transmit Data Request to Send Clear to Send Ring Indicator Data Carrier Detect Data Set Ready Data Terminal Ready Serial Receive Data Serial Transmit Data FBEN /2 /(M+N/2048) Table 46. UART Signal Description Pin SPM0 (Mode 1) SPM1 (Mode 1) SPM2 (Mode 1) SPM3 (Mode 1) SPM4 (Mode 1) SPM5 (Mode 1) SPM6 (Mode 1) SPM7 (Mode 1) SPM8 (Mode 2) SPM9 (Mode 2) 41.78 MHz 2 × 16 × 2 × DL CD 04955-032 Table 45. SPM Configuration 1. CD ( × 16 × DL × 2 × M + N 2048 ) 41.78 MHz N = 2048 Baud Rate × 2CD ×16 × DL × 2 For example, generation of 19,200 baud with CD bits = 3 (Table 47 gives DL = 8 h), The serial communication adopts an asynchronous protocol, which supports various word lengths, stop bits, and parity generation options selectable in the configuration register. M+ 41.78 MHz N = 2048 19200 × 2 3 × 16 × 8 × 2 M+ N = 1.06 2048 where: M=1 N = 0.06 × 2048 = 128 Baud Rate = 41.78 MHz 128 ⎞ 2 × 16 × 8 × 2 × ⎛⎜ ⎟ ⎝ 2048 ⎠ 3 where: Baud Rate = 19,200 bps Rev. A | Page 62 of 92 ADuC7019/20/21/22/24/25/26/27 COMDIV1 Register Error = 0% compared to 6.25% with the normal baud rate generator. Name COMDIV1 UART Registers Definition The UART interface consists on 12 registers: COMTX, COMRX, COMDIV0, COMIEN0, COMDIV1, COMIIDO, COMCON0, COMCON1, COMSTA0, COMSTA1, COMSCR, and COMDIV2. Address 0xFFFF0700 Default Value 0x00 Access R/W COMTX is an 8-bit transmit register. COMRX Register Name COMRX Address 0xFFFF0700 Default Value 0x00 Access R COMRX is an 8-bit receive register. COMDIV0 Register Name COMDIV0 Default Value 0x00 COMDIV1 is a divisor latch (high byte) register. COMIID0 Register Name COMIID0 Address 0xFFFF0708 Default Value 0x01 Address 0xFFFF0700 Default Value 0x00 Access R/W Bit 2:1 Status Bits 00 11 Bit 0 NINT 1 0 1 10 0 2 01 0 3 00 0 4 Priority Definition No interrupt Receive line status interrupt Receive buffer full interrupt Transmit buffer empty interrupt Modem status interrupt COMCON0 Register COMIEN0 Register COMCON0 is the line control register. Address 0xFFFF0704 Default Value 0x00 Name COMCON0 Access R/W COMIEN0 is the interrupt enable register. Name 2 ELSI 1 ETBEI 0 EDSSI ERBFI Description Reserved. Modem Status Interrupt Enable Bit. Set by user to enable generation of an interrupt if any of COMSTA1[3:0] are set. Cleared by user. Rx Status Interrupt Enable Bit. Set by user to enable generation of an interrupt if any of COMSTA0[3:0] are set. Cleared by user. Enable Transmit Buffer Empty Interrupt. Set by user to enable interrupt when buffer is empty during a transmission. Cleared by user. Enable Receive Buffer Full Interrupt. Set by user to enable interrupt when buffer is full during a reception. Cleared by user. Address 0xFFFF070C Default Value 0x00 Clearing Operation Read COMSTA0 Read COMRX Write data to COMTX or read COMIID0 Read COMSTA1 register Access R/W Table 50. COMCON0 MMR Bit Descriptions Bit 7 Name DLAB 6 BRK 5 SP 4 EPS 3 PEN 2 STOP 1:0 WLS Table 48. COMIEN0 MMR Bit Descriptions Bit 7:4 3 Access R Table 49. COMIID0 MMR Bit Descriptions COMDIV0 is a low-byte divisor latch. COMTX, COMRX, and COMDIV0 share the same address location. COMTX and COMRX can be accessed when Bit 7 in COMCON0 register is cleared. COMDIV0 can be accessed when Bit 7 of COMCON0 is set. Name COMIEN0 Access R/W COMIID0 is the interrupt identification register. COMTX Register Name COMTX Address 0xFFFF0704 Rev. A | Page 63 of 92 Description Divisor Latch Access. Set by user to enable access to COMDIV0 and COMDIV1 registers. Cleared by user to disable access to COMDIV0 and COMDIV1 and enable access to COMRX and COMTX. Set Break. Set by user to force SOUT to 0. Cleared to operate in normal mode. Stick Parity. Set by user to force parity to defined values: 1 if EPS = 1 and PEN = 1, 0 if EPS = 0 and PEN = 1. Even Parity Select Bit. Set for even parity. Cleared for odd parity. Parity Enable Bit. Set by user to transmit and check the parity bit. Cleared by user for no parity transmission or checking. Stop Bit. Set by user to transmit 1.5 stop bits if the word length is 5 bits or 2 stop bits if the word length is 6 bits, 7 bits, or 8 bits. The receiver checks the first stop bit only, regardless of the number of stop bits selected. Cleared by user to generate 1 stop bit in the transmitted data. Word Length Select: 00 = 5 bits, 01 = 6 bits 10 = 7 bits, 11 = 8 bits ADuC7019/20/21/22/24/25/26/27 COMCON1 Register Name COMCON1 COMSTA1 Register Address 0xFFFF0710 Default Value 0x00 Access R/W Name COMSTA1 Address 0xFFFF0718 Default Value 0x00 COMCON1 is the modem control register. COMSTA1 is a modem status register. Table 51. COMCON1 MMR Bit Descriptions Table 53. COMSTA1 MMR Bit Descriptions Bit 7:5 4 Name Bit 7 6 5 4 3 Name DCD RI DSR CTS DDCD 3 PEN 2 TERI 2 STOP 1 DDSR 0 DCTS LOOPBACK 1 RTS 0 DTR Description Reserved. Loop Back. Set by user to enable loop back mode. In loop back mode, the SOUT is forced high. The modem signals are also directly connected to the status inputs (RTS to CTS, DTR to DSR, OUT1 to RI, and OUT2 to DCD). Cleared by user to be in normal mode. Parity Enable Bit. Set by user to transmit and check the parity bit. Cleared by user for no parity transmission or checking. Stop Bit. Set by user to transmit 1.5 stop bits if the word length is 5 bits or 2 stop bits if the word length is 6 bits, 7 bits, or 8 bits. The receiver checks the first stop bit only, regardless of the number of stop bits selected. Cleared by user to generate 1 stop bit in the transmitted data. Request To Send. Set by user to force the RTS output to 0. Cleared by user to force the RTS output to 1. Data Terminal Ready. Set by user to force the DTR output to 0. Cleared by user to force the DTR output to 1. Access R Description Data Carrier Eetect. Ring Indicator. Data Set Ready. Clear To Send. Delta DCD. Set automatically if DCD changed state since COMSTA1 last read. Cleared automatically by reading COMSTA1. Trailing Edge RI. Set if NRI changed from 0 to 1 since COMSTA1 last read. Cleared automatically by reading COMSTA1. Delta DSR. Set automatically if DSR changed state since COMSTA1 last read. Cleared automatically by reading COMSTA1. Delta CTS. Set automatically if CTS changed state since COMSTA1 last read. Cleared automatically by reading COMSTA1. COMSCR Register Name COMSCR Address 0xFFFF071C Default Value 0x00 Access R/W COMSCR is an 8-bit scratch register used for temporary storage. It is also used in network addressable UART mode. COMDIV2 Register COMSTA0 Register Name COMSTA0 Address 0xFFFF0714 Default Value 0x60 Access R Name COMDIV2 Address 0xFFFF072C Default Value 0x0000 COMDIV2 is a 16-bit fractional baud divide register. COMSTA0 is the line status register. Table 54. COMDIV2 MMR Bit Descriptions Table 52. COMSTA0 MMR Bit Descriptions Bit 15 Name FBEN 14:13 12:11 10:0 FBM[1-0] FBN[10-0] Bit 7 6 Name 5 THRE 4 BI 3 FE 2 PE 1 OE 0 DR TEMT Description Reserved. COMTX Empty Status Bit. Set automatically if COMTX is empty. Cleared automatically when writing to COMTX. COMTX and COMRX Empty. Set automatically if COMTX and COMRX are empty. Cleared automatically when one of the register receives data. Break Error. Set when SIN is held low for more than the maximum word length. Cleared automatically. Framing Error. Set when invalid stop bit. Cleared automatically. Parity Error. Set when a parity error occurs. Cleared automatically. Overrun Error. Set automatically if data is overwritten before being read. Cleared automatically. Data Ready. Set automatically when COMRX is full. Cleared by reading COMRX. Access R/W Rev. A | Page 64 of 92 Description Fractional Baud Rate Generator Enable Bit. Set by user to enable the fractional baud rate generator. Cleared by user to generate baud rate using the standard 450 UART baud rate generator. Reserved. M if FBM = 0, M = 4. N. ADuC7019/20/21/22/24/25/26/27 Network Addressable UART Mode Table 56. COMIID1 MMR Bit Descriptions This mode connects the MicroConverter to a 256-node serial network, either as a hardware single-master or via software in a multimaster network. Bit 7 of COMIEN1 (ENAM bit) must be set to enable UART in network addressable mode. Note that there is no parity check in this mode; the parity bit is used for address. Bit 3:1 Status Bits 000 110 Bit 0 NINT 1 0 2 Network Addressable UART Register Definitions 101 0 3 Four additional registers, COMSCR, COMIEN1, COMIID1, and COMADR are only used in network addressable UART mode. 011 0 1 010 0 2 001 0 3 000 0 4 COMSCR is an 8-bit scratch register used for temporary storage. In network address mode, the least significant bit of the scratch register is the transmitted network address control bit. If set to 1, the device is transmitting an address. If cleared to 0, the device is transmitting data. COMIEN1 Register Name COMIEN1 Address 0xFFFF0720 Default Value 0x04 Access R/W COMIEN1 is an 8-bit network enable register. Bit 7 Name ENAM 6 E9BT 5 E9BR 4 3 ENI E9BD 2 ETD 1 0 NABP NAB Description Network Address Mode Enable Bit. Set by user to enable network address mode. Cleared by user to disable network address mode. 9-Bit Transmit Enable Bit. Set by user to enable 9-bit transmit. ENAM must be set. Cleared by user to disable 9-bit transmit. 9-Bit Receive Enable Bit. Set by user to enable 9-bit receive. ENAM must be set. Cleared by user to disable 9-bit receive. Network Interrupt Enable Bit. Word Length. Set for 9-bit data. E9BT has to be cleared. Cleared for 8-bit data. Transmitter Pin Driver Enable Bit. Set by user to enable SOUT pin as an output in slave mode or multimaster mode. Cleared by user; SOUT is three-state. Network Address Bit. Interrupt polarity bit. Network Address Bit. Set by user to transmit the slave’s address. Cleared by user to transmit data. COMIID1 Register Name COMIID1 Address 0xFFFF0724 Default Value 0x01 Access R COMIID1 is an 8-bit network interrupt register. Bit 7 to Bit 4 are reserved (see Table 56). Definition No interrupt Matching network address Address transmitted, buffer empty Receive line status interrupt Receive buffer full interrupt Transmit buffer empty interrupt Modem status interrupt Clearing Operation Read COMRX Write data to COMTX or read COMIID0 Read COMSTA0 Read COMRX Write data to COMTX or read COMIID0 Read COMSTA1 register COMADR Register Name COMADR Table 55. COMIEN1 MMR Bit Descriptions Priority Address 0xFFFF0728 Default Value 0xAA Access R/W COMADR is an 8-bit, read/write network address register that holds the address that the network addressable UART checks for. Upon receiving this address, the device interrupts the processor and/or sets the appropriate status bit in COMIID1. SERIAL PERIPHERAL INTERFACE The ADuC7019/7020/7021/7022/7024/7025/7026/7027 integrate a complete hardware serial peripheral interface (SPI) on-chip. SPI is an industry standard, synchronous serial interface that allows eight bits of data to be synchronously transmitted and simultaneously received, that is, full duplex up to a maximum bit rate of 3.48 Mb as shown in Table 57. The SPI interface is not operational with core clock divider bits (CD bits) POWCON[2:0] = 6 or 7 in master mode. The SPI port can be configured for master or slave operation and typically consists of four pins: MISO, MOSI, SCL, and CS. MISO (Master In, Slave Out) Pin The MISO pin is configured as an input line in master mode and an output line in slave mode. The MISO line on the master (data in) should be connected to the MISO line in the slave device (data out). The data is transferred as byte wide (8-bit) serial data, MSB first. MOSI (Master Out, Slave In) Pin The MOSI pin is configured as an output line in master mode and an input line in slave mode. The MOSI line on the master (data out) should be connected to the MOSI line in the slave device (data in). The data is transferred as byte wide (8-bit) serial data, MSB first. Rev. A | Page 65 of 92 ADuC7019/20/21/22/24/25/26/27 SCL (Serial Clock) I/O Pin SPISTA Register The master serial clock (SCL) is used to synchronize the data being transmitted and received through the MOSI SCL period. Therefore, a byte is transmitted/received after eight SCL periods. The SCL pin is configured as an output in master mode and as an input in slave mode. Name SPISTA In master mode, polarity and phase of the clock are controlled by the SPICON register, and the bit rate is defined in the SPIDIV register as follows: Table 58. SPISTA MMR Bit Descriptions f serial clock = fUCLK 2 × (1 + SPIDIV ) Table 57. SPI Speed vs. Clock Divider Bits in Master Mode CD Bits SPIDIV in hex SPI speed in MHz 0 0x05 1 0x0B 2 0x17 3 0x2F 4 0x5F 5 0xBF 3.482 1.741 0.870 0.435 0.218 0.109 In slave mode, the SPICON register must be configured with the phase and polarity of the expected input clock. The slave accepts data from an external master up to 10.4 Mb at CD = 0. The formula to determine the maximum speed is as follow: Default Value 0x00 Access R/W SPISTA is an 8-bit read-only status register. Only Bit 1 or Bit 4 of this register generates an interrupt. Bit 6 of the SPICON register determines which bit generates the interrupt. Bit 7:6 5 4 The maximum speed of the SPI clock is dependant on the clock divider bits and is summarized in Table 57. Address 0xFFFF0A00 3 2 1 0 Description Reserved. SPIRX Data Register Overflow Status Bit. Set if SPIRX is overflowing. Cleared by reading SPIRX register. SPIRX Data Register IRQ. Set automatically if Bit 3 or Bit 5 is set. Cleared by reading SPIRX register. SPIRX Data Register Full Status Bit. Set automatically if a valid data is present in the SPIRX register. Cleared by reading SPIRX register. SPITX Data Register Underflow Status Bit. Set automatically if SPITX is under flowing. Cleared by writing in the SPITX register. SPITX Data Register IRQ. Set automatically if Bit 0 is clear or Bit 2 is set. Cleared by writing in the SPITX register or if finished transmission disabling the SPI. SPITX Data Register Empty Status Bit. Set by writing to SPITX to send data. This bit is set during transmission of data. Cleared when SPITX is empty. SPIRX Register f serialclock f = HCLK 4 Name SPIRX Address 0xFFFF0A04 Default Value 0x00 In both master and slave modes, data is transmitted on one edge of the SCL signal and sampled on the other. Therefore, it is important that the polarity and phase are configured the same for the master and slave devices. SPIRX is an 8-bit read-only receive register. Chip Select (CS) Input Pin SPITX is an 8-bit write-only transmit register. In SPI slave mode, a transfer is initiated by the assertion of CS , which is an active low input signal. The SPI port then transmits and receives 8-bit data until the transfer is concluded by deassertion of CS. In slave mode, CS is always an input. SPI Registers The following MMR registers are used to control the SPI interface: SPISTA, SPIRX, SPITX, SPIDIV, and SPICON. Access R SPITX Register Name SPITX Address 0xFFFF0A08 Default Value 0x00 Access W SPIDIV Register Name SPIDIV Address 0xFFFF0A0C Default Value 0x1B Access R/W SPIDIV is an 8-bit serial clock divider register. SPICON Register Name SPICON Address 0xFFFF0A10 Default Value 0x0000 SPICON is a 16-bit control register. Rev. A | Page 66 of 92 Access R/W ADuC7019/20/21/22/24/25/26/27 Table 59. SPICON MMR Bit Descriptions Bit 15:13 12 11 10 9 8 7 6 5 4 3 2 1 0 Description Reserved. Continuous Transfer Enable. Set by user to enable continuous transfer. In master mode, the transfer continues until no valid data is available in the TX register. CS is asserted and remains asserted for the duration of each 8-bit serial transfer until TX is empty. Cleared by user to disable continuous transfer. Each transfer consists of a single 8-bit serial transfer. If valid data exists in the SPITX register, then a new transfer is initiated after a stall period. Loop Back Enable. Set by user to connect MISO to MOSI and test software. Cleared by user to be in normal mode. Slave Output Enable. Set by user to enable the slave output. Cleared by user to disable slave output. Slave Select Input Enable. Set by user in master mode to enable the output. Cleared by user to disable master output. SPIRX Overflow Overwrite Enable. Set by user, the valid data in the RX register is overwritten by the new serial byte received. Cleared by user, the new serial byte received is discarded. SPITX Underflow Mode. Set by user to transmit 0. Cleared by user to transmit the previous data. Transfer and Interrupt Mode. Set by user to initiate transfer with a write to the SPITX register. Interrupt only occurs when TX is empty. Cleared by user to initiate transfer with a read of the SPIRX register. Interrupt only occurs when RX is full. LSB First Transfer Enable Bit. Set by user, the LSB is transmitted first. Cleared by user, the MSB is transmitted first. Reserved. Serial Clock Polarity Mode Bit. Set by user, the serial clock idles high. Cleared by user, the serial clock idles low. Serial Clock Phase Mode Bit. Set by user, the serial clock pulses at the beginning of each serial bit transfer. Cleared by user, the serial clock pulses at the end of each serial bit transfer. Master Mode Enable Bit. Set by user to enable master mode. Cleared by user to enable slave mode. SPI Enable Bit. Set by user to enable the SPI. Cleared by user to disable the SPI. I2C COMPATIBLE INTERFACES Serial Clock Generation The ADuC7019/7020/7021/7022/7024/7025/7026/7027 support two fully licensed I2C interfaces. The I2C interfaces are both implemented as a full hardware master and slave interface. Because the two I2C interfaces are identical, this data sheet describes only I2C0 in detail. Note that the two masters and one of the slaves have individual interrupts. See the Interrupt System section. The I2C master in the system generates the serial clock for a transfer. The master channel can be configured to operate in fast mode (400 kHz) or standard mode (100 kHz). The two pins used for data transfer, SDA and SCL, are configured in a wired-AND format that allows arbitration in a multimaster system. The I2C bus peripheral’s address in the I2C bus system is programmed by the user. This ID can be modified any time a transfer is not in progress. The user can configure the interface to respond to four slave addresses. The transfer sequence of an I2C system consists of a master device initiating a transfer by generating a start condition while the bus is idle. The master transmits the address of the slave device and the direction of the data transfer in the initial address transfer. If the master does not lose arbitration and the slave acknowledges, then the data transfer is initiated. This continues until the master issues a stop condition and the bus becomes idle. The I2C peripheral master and slave functionality are independent and can be simultaneously active. A slave is activated when a transfer has been initiated on the bus. If it is not addressed, it remains inactive until another transfer is initiated. This also allows a master device, which loses arbitration, to respond as a slave in the same cycle. The bit rate is defined in the I2C0DIV MMR as follows: f serialclock = f UCLK (2 + DIVH ) + (2 + DIVL) where: fUCLK = clock before the clock divider. DIVH = the high period of the clock. DIVL = the low period of the clock. Thus, for 100 kHz operation, DIVH = DIVL = 0×CF and for 400 kHz, DIVH = DIVL = 0×32 The I2C×DIV register corresponds to DIVH:DIVL. Slave Addresses The registers I2C0ID0, I2C0ID1, I2C0ID2, and I2C0ID3 contain the device IDs. The device compares the four I2C0IDx registers to the address byte. The seven most significant bits of either ID register must be identical to that of the seven most significant bits of the first address byte received to be correctly addressed. The LSB of the ID registers, the transfer direction bit, is ignored in the process of address recognition. Rev. A | Page 67 of 92 ADuC7019/20/21/22/24/25/26/27 I2C Registers Table 61. I2C0SSTA MMR Bit Descriptions Bit 31:15 14 2 The I C peripheral interface consists of 18 MMRs, which are discussed in this section. Value I2CxMSTA Registers Name I2C0MSTA I2C1MSTA Address 0xFFFF0800 0xFFFF0900 Default Value 0x00 0x00 Access R R 13 I2CxMSTA are status registers for the master channel. Table 60. I2C0MSTA MMR Bit Descriptions Bit 7 6 5 4 3 2 1 0 Description Master Transmit FIFO Flush. Set by user to flush the master Tx FIFO. Cleared automatically once the master Tx FIFO is flushed. This bit also flushes the slave receive FIFO. Master Busy. Set automatically if the master is busy. Cleared automatically. Arbitration Loss. Set in multimaster mode if another master has the bus. Cleared when the bus becomes available. No ACK. Set automatically if there is no acknowledge of the address by the slave device. Cleared automatically by reading the I2C0MSTA register. Master Receive IRQ. Set after receiving data. Cleared automatically by reading the I2C0MRX register. Master Transmit IRQ. Set at the end of a transmission. Cleared automatically by writing to the I2C0MTX register. Master Transmit FIFO Underflow. Set automatically if the master transmit FIFO is underflowing. Cleared automatically by writing to the I2C0MTX register. Master TX FIFO Empty. Set automatically if the master transmit FIFO is empty. Cleared automatically by writing to the I2C0MTX register. 12:11 00 01 10 11 10 9:8 00 01 10 11 7 I2CxSSTA Registers Name I2C0SSTA I2C1SSTA Address 0xFFFF0804 0xFFFF0904 Default Value 0x01 0x01 I2CxSSTA are status registers for the slave channel. Access R R 6 5 4 3 2 1 0 Rev. A | Page 68 of 92 Description Reserved. These bits should be written as 0. START Decode Bit. Set by hardware if the device receives a valid START + matching address. Cleared by an I2C STOP condition or an I2C general call reset. Repeated START Decode Bit. Set by hardware if the device receives a valid repeated START + matching address. Cleared by an I2C STOP condition, a read of the I2CSSTA register, or an I2C general call reset. ID Decode Bits. Received Address Natched ID Register 0. Received Address Matched ID Register 1. Received Address Matched ID Register 2. Received Address Matched ID Register 3. Stop After Start and Matching Address Interrupt. Set by hardware if the slave device receives an I2C STOP condition after a previous I2C START condition and matching address. Cleared by a read of the I2C0SSTA register. General Call ID. No General Call. General Call Reset and Program Address. General Call Program Address. General Call Matching Alternative ID. General Call Interrupt. Set if the slave device receives a general call of any type. Cleared by setting Bit 8 of the I2CxCFG register. If it is a general call reset, then all registers are at their default values. If it is a hardware general call, then the Rx FIFO holds the second byte of the general call. This is similar to the I2C0ALT register (unless it is a general call to reprogram the device address). For more details, see I2C bus specification, version 2.1, Jan. 2000. Slave Busy. Set automatically if the slave is busy. Cleared automatically. No ACK. Set if master asking for data and no data is available. Cleared automatically by reading the I2C0SSTA register. Slave Receive FIFO Overflow. Set automatically if the slave receive FIFO is overflowing. Cleared automatically by reading the I2C0SSTA register. Slave Receive IRQ. Set after receiving data. Cleared automatically by reading the I2C0SRX register or flushing the FIFO. Slave Transmit IRQ. Set at the end of a transmission. Cleared automatically by writing to the I2C0STX register. Slave Transmit FIFO Underflow. Set automatically if the slave transmit FIFO is underflowing. Cleared automatically by writing to the I2C0SSTA MMR. Slave Transmit FIFO Empty. Set automatically if the slave transmit FIFO is empty. Cleared automatically by writing to the I2C0STX register. ADuC7019/20/21/22/24/25/26/27 I2CxSRX Registers Name I2C0SRX I2C1SRX Address 0xFFFF0808 0xFFFF0908 I2CxADR Registers Default Value 0x00 0x00 Access R R I2CxSRX are receive registers for the slave channel. I2CxSTX Registers Name I2C0STX I2C1STX Address 0xFFFF080C 0xFFFF090C Default Value 0x00 0x00 Access W W Name I2C0ADR I2C1ADR Address 0xFFFF081C 0xFFFF091C I2CxBYTE Registers I2CxMRX Registers Name I2C0BYTE I2C1BYTE Address 0xFFFF0810 0xFFFF0910 Default Value 0x00 0x00 Access R R I2CxMRX are receive registers for the master channel. I2CxMTX Registers Name I2C0MTX I2C1MTX Address 0xFFFF0814 0xFFFF0914 Default Value 0x00 0x00 Access W W I2CxMTXare transmit registers for the master channel. I2CxCNT Registers Name I2C0CNT I2C1CNT Address 0xFFFF0818 0xFFFF0918 Default Value 0x00 0x00 Access R/W R/W I2CxCNT are 3-bit master receive data count registers. If a master read transfer sequence is initiated, then the I2CxCNT registers denote the number of bytes (−1) to be read from the slave device. By default, this counter is 0, which corresponds to 1 byte expected. Access R/W R/W I2CxADR are master address byte registers. The I2CxADR value is the device address that the master wants to communicate with. It automatically transmits at the start of a master transfer sequence if there is no valid data in the I2CxMTX register when the master enable bit is set. I2CxSTX are transmit registers for the slave channel. Name I2C0MRX I2C1MRX Default Value 0x00 0x00 Address 0xFFFF0824 0xFFFF0924 Default Value 0x00 0x00 Access R/W R/W I2CxBYTE are broadcast byte registers. Data written to these register do not go through the TxFIFO. This data is transmitted at the start of a transfer sequence before the address. Once the byte has been transmitted and acknowledged, the I2C expects another byte written in I2CxBYTE or an address written to the address register. I2CxALT Registers Name I2C0ALT I2C1ALT Address 0xFFFF0828 0xFFFF0928 Default Value 0x00 0x00 Access R/W R/W I2CxALT are hardware general call ID registers used in slave mode. I2CxCFG Registers Name I2C0CFG I2C1CFG Address 0xFFFF082C 0xFFFF092C Default Value 0x00 0x00 I2CxCFG are configuration registers. Rev. A | Page 69 of 92 Access R/W R/W ADuC7019/20/21/22/24/25/26/27 Table 62. I2C0CFG MMR Bit Descriptions Bit 31:5 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Description Reserved. These bits should be written by the user as 0. Enable Stop Interrupt. Set by the user to generate an interrupt upon receiving a stop condition and after receiving a valid start condition + matching address. Cleared by the user to disable the generation of an interrupt upon receiving a stop condition. Reserved. Reserved. Enable Stretch SCL (Holds SCL Low). Set by the user to stretch the SCL line. Cleared by the user to disable stretching of the SCL line. Reserved. Slave Tx FIFO Request Interrupt Enable. Set by the user to disable the slave Tx FIFO request interrupt. Cleared by the user to generate an interrupt request just after the negative edge of the clock for the R/W bit. This allows the user to input data into the slave Tx FIFO if it is empty. At 400 ksps and the core clock running at 41.78 MHz, the user has 45 clock cycles to take appropriate action, taking interrupt latency into account. General Call Status Bit Clear. Set by the user to clear the general call status bits. Cleared automatically by hardware after the general call status bits have been cleared. Master Serial Clock Enable Bit. Set by user to enable generation of the serial clock in master mode. Cleared by user to disable serial clock in master mode. Loop Back Enable Bit. Set by user to internally connect the transition to the reception to test user software. Cleared by user to operate in normal mode. Start Back-Off Disable Bit. Set by user in multimaster mode. If losing arbitration, the master immediately tries to retransmit. Cleared by user to enable start back-off. After losing arbitration, the master waits before trying to retransmit. Hardware General Call Enable. When this bit and the general call enable bit are set, and have received a general call (address 0x00) and a data byte, the device checks the contents of the I2C0ALT against the receive register. If they match, then the device has received a hardware general call. This is used if a device needs urgent attention from a master device without knowing which master it needs to turn to. This is a "to whom it may concern" call. The ADuC7019/7020/7021/7022/7024/7025/7026/7027 watch for these addresses. The device that requires attention embeds its own address into the message. All masters listen and the master that knows how to handle the device contacts its slave and acts appropriately. The LSB of the I2C0ALT register should always be written to a 1, as per I2C January 2000 specification. General Call Enable Bit. Set this bit to enable the slave device to ACK an I2C general call, address 0x00 (write). The device then recognizes a data bit. If it receives a 0x06 as the data byte, “Reset and write programmable part of slave address by hardware,” then the I2C interface resets as per the I2C January 2000 specification. This command can be used to reset an entire I2C system. The general call interrupt status bit sets on any general call. It is up to the user to take correct action by setting up the I2C interface after a reset. If it receives a 0x04 as the data byte, “Write programmable part of slave address by hardware,” then the general call interrupt status bit sets on any general call. It is up to the user to take correct action by reprogramming the device address. Reserved. Master Enable Bit. Set by user to enable the master I2C channel. Cleared by user to disable the master I2C channel. Slave Enable Bit. Set by user to enable the slave I2C channel. A slave transfer sequence is monitored for the device address in I2C0ID0, I2C0ID1, I2C0ID2, and I2C0ID3. If the device address is recognized, the part participates in the slave transfer sequence. Cleared by user to disable the slave I2C channel. I2CxDIV Registers Name I2C0DIV I2C1DIV Address 0xFFFF0830 0xFFFF0930 Default Value 0x1F1F 0x1F1F Access R/W R/W I2CxDIV are the clock divider registers. I2CxIDx Registers Name I2C0ID0 I2C0ID1 I2C0ID2 I2C0ID3 I2C1ID0 I2C1ID1 I2C1ID2 I2C1ID3 Address 0xFFFF0838 0xFFFF083C 0xFFFF0840 0xFFFF0844 0xFFFF0938 0xFFFF093C 0xFFFF0940 0xFFFF0944 Default Value 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 Access R/W R/W R/W R/W R/W R/W R/W R/W I2CxID0, I2CxID1, I2CxID2, and I2CxID3 are slave address device ID registers of I2Cx. I2CxCCNT Registers Name I2C0CCNT I2C1CCNT Address 0xFFFF0848 0xFFFF0948 Default Value 0x01 0x01 Access R/W R/W I2CxCCNT are 8-bit start/stop generation counters. They hold off SDA low for start and stop conditions. I2CxFSTA Registers Name I2C0FSTA I2C1FSTA Address 0xFFFF084C 0xFFFF094C Default Value 0x0000 0x0000 I2CxFSTA are FIFO status registers. Rev. A | Page 70 of 92 Access R R ADuC7019/20/21/22/24/25/26/27 Table 63. I2C0FSTA MMR Bit Descriptions Bit 15:0 9 Value Description Reserved. Master Transmit FIFO Flush. Set by the user to flush the master Tx FIFO. Cleared automatically once the master Tx FIFO is flushed. This bit also flushes the slave receive FIFO. Slave Transmit FIFO Flush. Set by the user to flush the slave Tx FIFO. Cleared automatically once the slave Tx FIFO is flushed. Master Rx FIFO Status Bits. FIFO Empty. Byte Written to FIFO. 1 Byte in FIFO. FIFO Full. Master Tx FIFO Status Bits. FIFO Empty. Byte Written to FIFO. 1 Byte in FIFO. FIFO Full. Slave Rx FIFO Status Bits. FIFO Empty. Byte Written to FIFO. 1 Byte in FIFO. FIFO Full. Slave Tx FIFO Status Bits. FIFO Empty. Byte Written to FIFO. 1 Byte in FIFO. FIFO Full. 8 7:6 00 01 10 11 5:4 00 01 10 11 3:2 00 01 10 11 1:0 00 01 10 11 In total, 30 GPIO pins are available on each ADuC7019/7020/ 7021/7022/7024/7025/7026/7027 for the PLA. These include 16 input pins and 14 output pins, which need to be configured in the GPxCON register as PLA pins before using the PLA. Note that the comparator output is also included as one of the 16 input pins. The PLA is configured via a set of user MMRs. The output(s) of the PLA can be routed to the internal interrupt system, to the CONVSTART signal of the ADC, to a MMR, or to any of the 16 PLA output pins. The two blocks can be interconnected as follows: • Output of Element 15 (Block 1) can be fed back to Input 0 of Mux 0 of Element 0 (Block 0) • Output of Element 7 (Block 0) can be fed back to the Input 0 of Mux 0 of Element 8 (Block 1) Table 64. Element Input/Output Element 0 1 2 3 4 5 6 7 PLA Block 0 Input P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P0.0 Output P1.7 P0.4 P0.5 P0.6 P0.7 P2.0 P2.1 P2.2 Element 8 9 10 11 12 13 14 15 PLA Block 1 Input P3.0 P3.1 P3.2 P3.3 P3.4 P3.5 P3.6 P3.7 Output P4.0 P4.1 P4.2 P4.3 P4.4 P4.5 P4.6 P4.7 PLA MMRs Interface The PLA peripheral interface consists of the 22 MMRs described in this section. PROGRAMMABLE LOGIC ARRAY (PLA) Every ADuC7019/7020/7021/7022/7024/7025/7026/7027 integrates a fully programmable logic array (PLA), which consists of two independent but interconnected PLA blocks. Each block consists of eight PLA elements, which gives each part a total of 16 PLA elements. PLAELMx Registers Each PLA element contains a two-input look-up table that can be configured to generate any logic output function based on two inputs and a flip-flop. This is represented in Figure 62. 0 2 4 A LOOK-UP TABLE 3 B 04955-033 1 Figure 62. PLA Element Name PLAELM0 PLAELM1 PLAELM2 PLAELM3 PLAELM4 PLAELM5 PLAELM6 PLAELM7 PLAELM8 PLAELM9 PLAELM10 PLAELM11 PLAELM12 PLAELM13 PLAELM14 PLAELM15 Rev. A | Page 71 of 92 Address 0xFFFF0B00 0xFFFF0B04 0xFFFF0B08 0xFFFF0B0C 0xFFFF0B10 0xFFFF0B14 0xFFFF0B18 0xFFFF0B1C 0xFFFF0B20 0xFFFF0B24 0xFFFF0B28 0xFFFF0B2C 0xFFFF0B30 0xFFFF0B34 0xFFFF0B38 0xFFFF0B3C Default Value 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W ADuC7019/20/21/22/24/25/26/27 PLAELMx are Element 0 to Element 15 control registers. They configure the input and output mux of each element, select the function in the look-up table, and bypass/use the flip-flop. See Table 65 and Table 67. Table 65. PLAELMx MMR Bit Descriptions Bit 31:11 10:9 8:7 6 Value 5 4:1 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 0 Description Reserved. Mux (0) Control (see Table 67). Mux (1) Control (see Table 67). Mux (2) Control. Set by user to select the output of mux (0). Cleared by user to select the bit value from PLADIN. Mux (3) Control. Set by user to select the input pin of the particular element. Cleared by user to select the output of mux (1). Look-Up Table Control. 0. NOR. B AND NOT A. NOT A. A AND NOT B. NOT B. EXOR. NAND. AND. EXNOR. B. NOT A OR B. A. A OR NOT B. OR. 1. Mux (4) Control. Set by user to bypass the flipflop. Cleared by user to select the flip-flop (cleared by default). PLACLK Register Name PLACLK Address 0xFFFF0B40 Default Value 0x00 Access R/W PLACLK is a clock selection for the flip-flops of Block 0 and clock selection for the flip-flops of Block 1. Table 66. PLACLK MMR Bit Descriptions Bit 7 6:4 Value 000 001 010 011 100 101 Other 3 2:0 000 001 010 011 100 101 Other Description Reserved Block 1 Clock Source Selection GPIO Clock on P0.5 GPIO Clock on P0.0 GPIO Clock on P0.7 HCLK OCLK (32.768 kHz) Timer1 Overflow Reserved Reserved Block 0 Clock Source Selection GPIO Clock on P0.5 GPIO Clock on P0.0 GPIO Clock on P0.7 HCLK OCLK (32.768 kHz) Timer1 Overflow Reserved Table 67. Feedback Configuration Bit 10:9 8:7 Value 00 01 10 11 00 01 10 11 PLAELM0 Element 15 Element 2 Element 4 Element 6 Element 1 Element 3 Element 5 Element 7 PLAELM1 to PLAELM7 Element 0 Element 2 Element 4 Element 6 Element 1 Element 3 Element 5 Element 7 Rev. A | Page 72 of 92 PLAELM8 Element 7 Element 10 Element 12 Element 14 Element 9 Element 11 Element 13 Element 15 PLAELM9 to PLAELM15 Element 8 Element 10 Element 12 Element 14 Element 9 Element 11 Element 13 Element 15 ADuC7019/20/21/22/24/25/26/27 PLAIRQ Register Name PLAIRQ PLADIN Register Address 0xFFFF0B44 Default Value 0x00000000 Access R/W Name PLADIN Address 0xFFFF0B4C Default Value 0x00000000 PLAIRQ enables IRQ0 and/or IRQ1 and selects the source of the IRQ. PLADIN is a data input MMR for PLA. Table 68. PLAIRQ MMR Bit Descriptions Bit 31:16 15:0 Bit 15:13 12 Value Description Reserved. PLA IRQ1 Enable Bit. Set by user to enable IRQ1 output from PLA. Cleared by user to disable IRQ1 output from PLA. PLA IRQ1 Source. PLA Element 0. PLA Element 1. PLA Element 15. Reserved. PLA IRQ0 Enable Bit. Set by user to enable IRQ0 output from PLA. Cleared by user to disable IRQ0 output from PLA. PLA IRQ0 Source. PLA Element 0. PLA Element 1. PLA Element 15. 11:8 0000 0001 1111 7:5 4 3:0 0000 0001 1111 PLAADC Register Name PLAADC Address 0xFFFF0B48 Default Value 0x00000000 Access R/W Table 70. PLADIN MMR Bit Descriptions Name PLADOUT 3:0 0000 0001 1111 Address 0xFFFF0B50 Default Value 0x00000000 Access R PLADOUT is a data output MMR for PLA. This register is always updated. Table 71. PLADOUT MMR Bit Descriptions Bit 31:16 15:0 Description Reserved Output Bit from Element 15 to Element 0 PLALCK Register Name PLALCK Address 0xFFFF0B54 Default Value 0x00 Access W PLALCK is a PLA lock option. Bit 0 is written only once. When set, it does not allow modifying any of the PLA MMR, except PLADIN. A PLA tool is provided in the development system to easily configure the PLA. Table 69. PLAADC MMR Bit Descriptions Value Description Reserved Input Bit to Element 15 to Element 0 PLADOUT Register PLAADC is a PLA source from the ADC start conversion signal. Bit 31:5 4 Access R/W Description Reserved. ADC Start Conversion Enable Bit. Set by user to enable ADC start conversion from PLA. Cleared by user to disable ADC start conversion from PLA. ADC Start Conversion Source. PLA Element 0. PLA Element 1. PLA Element 15. Rev. A | Page 73 of 92 ADuC7019/20/21/22/24/25/26/27 PROCESSOR REFERENCE PERIPHERALS INTERRUPT SYSTEM IRQSTA Register There are 23 interrupt sources on the ADuC7019/7020/ 7021/7022/7024/7025/7026/7027 that are controlled by the interrupt controller. Most interrupts are generated from the onchip peripherals, such as ADC and UART. Four additional interrupt sources are generated from external interrupt request pins, IRQ0, IRQ1, IRQ2, and IRQ3. The ARM7TDMI CPU core only recognizes interrupts as one of two types, a normal interrupt request IRQ or a fast interrupt request FIQ. All the interrupts can be masked separately. Name IRQSTA The control and configuration of the interrupt system is managed through nine interrupt-related registers, four dedicated to IRQ, and four dedicated to FIQ. An additional MMR is used to select the programmed interrupt source. The bits in each IRQ and FIQ registers (except for Bit 23) represent the same interrupt source as described in Table 72. IRQSIG Register Table 72. IRQ/FIQ MMRs Bit Description Bit 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Description All Interrupts OR’ed SWI Timer0 Timer1 Wake-Up Timer – Timer2 Watchdog Timer – Timer3 Flash Control ADC Channel PLL Lock I2C0 Slave I2C0 Master I2C1 Master SPI Slave SPI Master UART External IRQ0 Comparator PSM External IRQ1 PLA IRQ0 PLA IRQ1 External IRQ2 External IRQ3 PWM Trip (IRQ only)/ PWM Sync (FIQ only) Address 0xFFFF0000 Default Value 0x00000000 Access R IRQSTA (read-only register) provides the current enabled IRQ source status. When set to 1 that source should generate an active IRQ request to the ARM7TDMI core. There is no priority encoder or interrupt vector generation. This function is implemented in software in a common interrupt handler routine. All 32 bits are logically OR’ed to create the IRQ signal to the ARM7TDMI core. Name IRQSIG Address 0xFFFF0004 Default Value 0x00XXX000 Access R IRQSIG reflects the status of the different IRQ sources. If a peripheral generates an IRQ signal, then the corresponding bit in the IRQSIG is set; otherwise it is cleared. The IRQSIG bits are cleared when the interrupt in the particular peripheral is cleared. All IRQ sources can be masked in the IRQEN MMR. IRQSIG is read-only. IRQEN Register Name IRQEN Address 0xFFFF0008 Default Value 0x00000000 Access R/W IRQEN provides the value of the current enable mask. When bit is set to 1, the source request is enabled to create an IRQ exception. When bit is set to 0, the source request is disabled or masked, which does not create an IRQ exception. IRQCLR Register Name IRQCLR Address 0xFFFF000C Default Value 0x00000000 Access W IRQCLR (write-only register) clears the IRQEN register in order to mask an interrupt source. Each bit set to 1 clears the corresponding bit in the IRQEN register without affecting the remaining bits. The pair of registers, IRQEN and IRQCLR, independently manipulates the enable mask without requiring an atomic read-modify-write. FIQ The fast interrupt request (FIQ) is the exception signal to enter the FIQ mode of the processor. It is provided to service data transfer or communication channel tasks with low latency. The FIQ interface is identical to the IRQ interface providing the second-level interrupt (highest priority). Four 32-bit registers are dedicated to FIQ: FIQSIG, FIQEN, FIQCLR, and FIQSTA. IRQ The interrupt request (IRQ) is the exception signal to enter the IRQ mode of the processor. It is used to service generalpurpose interrupt handling of internal and external events. The four 32-bit registers dedicated to IRQ are: IRQSTA, IRQSIG, IRQEN, and IRQCLR. Rev. A | Page 74 of 92 ADuC7019/20/21/22/24/25/26/27 FIQSTA Register Name FIQSTA Address 0xFFFF0100 TIMERS Default Value 0x00000000 Access R Default Value 0x00XXX000 Access R FIQSIG Register Name FIQSIG Address 0xFFFF0104 FIQEN Register Name FIQEN Address 0xFFFF0108 Address 0xFFFF010C Timer2 or Wake-Up Timer Timer3 or Watchdog Timer In free-running mode, the counter decreases from the maximum value until zero scale and starts again at the minimum value. (It also increases from the minimum value until full scale and starts again at the maximum value.) SWICFG Register Default Value 0x00000000 Access W Table 73. SWICFG MMR Bit Descriptions 0 • Access W Because the programmed interrupts are nonmaskable, they are controlled by another register, SWICFG, which simultaneously writes into the IRQSTA and IRQSIG registers, and/or the FIQSTA and FIQSIG registers. The 32-bit register dedicated to software interrupt is SWICFG described in Table 73. This MMR allows the control of programmed source interrupt. 1 Timer1 Default Value 0x00000000 Programmed Interrupts Bit 31:3 2 • • The logic for FIQEN and FIQCLR does not allow an interrupt source to be enabled in both IRQ and FIQ masks. A bit set to 1 in FIQEN does, as a side effect, clear the same bit in IRQEN. Also, a bit set to 1 in IRQEN does, as a side effect, clear the same bit in FIQEN. An interrupt source can be disabled in both IRQEN and FIQEN masks. Address 0xFFFF0010 Timer0 Access R/W Bit 31 to Bit 1 of FIQSTA are logically OR’ed to create the FIQ signal to the core and Bit 0 of both the FIQ and IRQ registers (FIQ source). Name SWICFG • Default Value 0x00000000 FIQCLR Register Name FIQCLR The ADuC7019/7020/7021/7022/7024/7025/7026/7027 have four general-purpose timer/counters: Description Reserved. Programmed Interrupt-FIQ. Setting/Clearing this bit corresponds with setting/clearing Bit 1 of FIQSTA and FIQSIG. Programmed Interrupt-IRQ. Setting/Clearing this bit corresponds with setting/clearing Bit 1 of IRQSTA and IRQSIG. Reserved. These four timers in their normal mode of operation can be either free-running or periodic. In periodic mode, the counter decrements/increments from the value in the load register (T×LD MMR) until zero/full scale and starts again at the value stored in the load register. The timer interval is calculated as follow: Interval = ( T × LD ) × prescaler source clock The value of a counter can be read at any time by accessing its value register (T×VAL). Note that when a timer is being clocked from a clock other than core clock, an incorrect value could be read (due to asynchronous clock system). In this configuration, T×VAL should always be read twice. If the two readings are different, then it should be read a third time to get the correct value. Timers are started by writing in the control register of the corresponding timer (T×CON). In normal mode, an IRQ is generated each time the value of the counter reaches zero when counting down. It is also generated each time the counter value reaches full scale when counting up. An IRQ can be cleared by writing any value to clear the register of that particular timer (T×CLRI). When using an asynchronous clock-to-clock timer, the interrupt in the timer block could take more time to clear than the time it takes for the code in the interrupt routine to execute. Ensure that the interrupt signal is cleared before leaving the interrupt service routine. This can be done by checking the IRQSTA MMR. Note that any interrupt signal must be active for at least the equivalent of the interrupt latency time, to be detected by the interrupt controller and to be detected by the user in the IRQSTA/FIQSTA register. Rev. A | Page 75 of 92 ADuC7019/20/21/22/24/25/26/27 Timer0 (RTOS Timer) T0CLRI Register Timer0 is a general-purpose, 16-bit timer (count-down) with a programmable prescaler (see Figure 63). The prescaler source is the core clock frequency (HCLK) and can be scaled by factors of 1, 16, or 256. Name T0CLRI TIMER0 IRQ 04955-034 TIMER0 VALUE Figure 63. Timer0 Block Diagram The counter can be formatted as a standard 32-bit value or as Hours: Minutes: Seconds: Hundredths. Timer0’s interface consists of four MMRS: T0LD, T0VAL, T0CON, and T0CLRI. T0LD Register Address 0xFFFF0300 Default Value 0x0000 Access R/W T0LD is a 16-bit load register. T0VAL Register Name T0VAL Address 0xFFFF0304 T0CLRI is an 8-bit register. Writing any value to this register clears the interrupt. Timer1 is a general-purpose, 32-bit timer (count down or count up) with a programmable prescaler. The source can be the 32 kHz external crystal, the core clock frequency, or an external GPIO, P1.0 or P0.6. This source can be scaled by a factor of 1, 16, 256, or 32768. ADC CONVERSION Name T0LD Default Value 0xFFFF Access R T0VAL is a 16-bit read-only register representing the current state of the counter. Timer1 has a capture register (T1CAP), which can be triggered by a selected IRQ source initial assertion. This feature can be used to determine the assertion of an event more accurately than the precision allowed by the RTOS timer when the IRQ is serviced. Timer1 can be used to start ADC conversions as shown in the block diagram in Figure 64. 32-BIT LOAD 32kHz OSCILLATOR HCLK P0.6 P1.0 PRESCALER /1, 16, 256 OR 32768 32-BIT UP/DOWN COUNTER Address 0xFFFF0308 Default Value 0x0000 TIMER1 IRQ ADC CONVERSION T0CON Register Name T0CON Access W TIMER1 VALUE Access R/W IRQ[31:0] T0CON is the configuration MMR described in Table 74. 04955-035 PRESCALER /1, 16 OR 256 HCLK Default Value 0xFF Timer1 (General-Purpose Timer) 16-BIT LOAD 16-BIT DOWN COUNTER Address 0xFFFF030C CAPTURE Figure 64. Timer1 Block Diagram Table 74. T0CON MMR Bit Descriptions Bit 31:8 7 Value 6 5:4 3:2 00 01 10 11 1:0 Description Reserved. Timer0 Enable Bit. Set by user to enable Timer0. Cleared by user to disable Timer0 by default. Timer0 Mode. Set by user to operate in periodic mode. Cleared by user to operate in free-running mode. Default mode. Reserved. Prescale. Core Clock/1. Default value. Core Clock/16. Core Clock/256. Undefined. Equivalent to 00. Reserved. Timer1’s interface consists of five MMRS: T1LD, T1VAL, T1CON, T1CLRI, and T1CAP. T1LD Register Name T1LD Address 0xFFFF0320 Default Value 0x00000000 Access R/W Default Value 0xFFFFFFFF Access R T1LD is a 16-bit load register. T1VAL Register Name T1VAL Address 0xFFFF0324 T1VAL is a 16-bit read-only register that represents the current state of the counter. T1CON Register Name T1CON Address 0xFFFF0328 Default Value 0x0000 Access R/W T1CON is the configuration MMR described in Table 75. Rev. A | Page 76 of 92 ADuC7019/20/21/22/24/25/26/27 Table 75. T1CON MMR Bit Descriptions T1CAP Register Bit 31:18 17 Name T1CAP 16:12 11:9 000 001 010 011 8 7 6 5:4 00 01 10 11 3:0 0000 0100 1000 1111 Description Reserved. Event Select Bit. Set by user to enable time capture of an event. Cleared by user to disable time capture of an event Event Select Range, 0 to 31. These events are as described in Table 72. All events are offset by two, that is, event 2 in Table 72 becomes event zero for the purposes of Timer1. Clock Select. Core Clock (HCLK). External 32.768 kHz Crystal. P1.0 Raising Edge Triggered. P0.6 Raising Edge Triggered. Count Up. Set by user for Timer1 to count up. Cleared by user for Timer1 to count down by default. Timer1 enable bit. Set by user to enable Timer1. Cleared by user to disable Timer1 by default. Timer1 Mode. Set by user to operate in periodic mode. Cleared by user to operate in free-running mode. Default mode. Format. Binary. Reserved. Hr:Min:Sec:Hundredths (23 hours to 0 hour). Hr:Min:Sec:Hundredths (255 hours to 0 hour). Prescale: Source Clock/1. Source Clock/16. Source Clock/256. Source Clock/32768. Name T1CLRI Address 0xFFFF032C Default Value 0xFF Access W T1CLRI is an 8-bit register. Writing any value to this register clears the Timer1 interrupt. Default Value 0x00000000 Access R T1CAP is a 32-bit register. It holds the value contained in T1VAL when a particular event occurred. This event must be selected in T1CON. Timer2 (Wake-Up Timer) Timer2 is a 32-bit wake-up timer (count-down or count-up) with a programmable prescaler. The source can be the 32 kHz external crystal, the core clock frequency, or the internal 32 kHz oscillator. The clock source can be scaled by a factor of 1, 16, 256, or 32,768. The wake-up timer continues to run when the core clock is disabled. The counter can be formatted as plain 32-bit value or as Hours: Minutes: Seconds: Hundredths. Timer2 can be used to start ADC conversions as shown in the block diagram Figure 65. 32-BIT LOAD INTERNAL OSCILLATOR EXTERNAL CRYSTAL PRESCALER /1, 16, 256 OR 32768 32-BIT UP/DOWN COUNTER TIMER2 IRQ HCLK TIMER2 VALUE Figure 65. Timer2 Block Diagram Timer2 interface consists in four MMRS: T2LD, T2VAL, T2CON, and T2CLRI. T2LD Register Name T2LD T1CLRI Register Address 0xFFFF0330 04955-036 Value Address 0xFFFF0340 Default Value 0x00000000 Access R/W T2LD is a 16-bit register load register. T2VAL Register Name T2VAL Address 0xFFFF0344 Default Value 0xFFFFFFFF Access R T2VAL is a 16-bit read-only register that represents the current state of the counter. Rev. A | Page 77 of 92 ADuC7019/20/21/22/24/25/26/27 16-BIT LOAD Name T2CON Address 0xFFFF0348 Default Value 0x0000 Access R/W PRESCALER /1, 16 OR 256 32.768kHz T2CON is the configuration MMR described in Table 76. Table 76. T2CON MMR Bit Descriptions Bit 31:11 10:9 Value Description Reserved. Clock Source. External Crystal. External Crystal. Internal Oscillator. Core Clock (41 MHz/2CD). Count Up. Set by user for Timer2 to count up. Cleared by user for Timer2 to count down by default. Timer2 Enable Bit. Set by user to enable Timer2. Cleared by user to disable Timer2 by default. Timer2 Mode. Set by user to operate in periodic mode. Cleared by user to operate in free-running mode. Default mode. Format. Binary. Reserved. Hr:Min:Sec:Hundredths (23 hours to 0 hour). Hr:Min:Sec:Hundredths (255 hours to 0 hour). Prescale: Source Clock/1 by Default. Source Clock/16. Source Clock/256 Expected for Format 2 and 3. Source Clock/32768. 00 01 10 11 8 7 6 5:4 00 01 10 11 3:0 0000 0100 1000 1111 16-BIT UP/DOWN COUNTER TIMER3 VALUE WATCHDOG RESET TIMER3 IRQ 04955-037 T2CON Register Figure 66. Timer3 Block Diagram Watchdog Mode Watchdog mode is entered by setting Bit 5 in T3CON MMR. Timer3 decreases from the value present in T3LD register until zero. T3LD is used as timeout. The maximum timeout can be 512 seconds using the prescaler/256, and full-scale in T3LD. Timer3 is clocked by the internal 32 kHz crystal when operating in the watchdog mode. Note that to enter watchdog mode successfully, Bit 5 in the T3CON MMR must be set after writing to the T3LD MMR. If the timer reaches 0, a reset or an interrupt occurs, depending on Bit 1 in T3CON register. To avoid reset or interrupt, any value must be written to T3ICLR before the expiration period. This reloads the counter with T3LD and begins a new timeout period. As soonas watchdog mode is entered, T3LD and T3CON are write-protected. These two registers cannot be modified until a reset clears the watchdog enable bit, which causes Timer3 to exit watchdog mode. The Timer3 interface consists of four MMRS: T3LD, T3VAL, T3CON, and T3CLRI. T3LD Register T2CLRI Register Name T2CLRI Address 0xFFFF034C Default Value 0xFF Access W T2CLRI is an 8-bit register. Writing any value to this register clears the Timer2 interrupt. Timer3 (Watchdog Time) Timer3 has two modes of operation, normal mode and watchdog mode. The watchdog timer is used to recover from an illegal software state. Once enabled, it requires periodic servicing to prevent it from forcing a reset of the processor. Normal Mode Timer3 in normal mode is identical to Timer0, except for the clock source and the count-up functionality. The clock source is 32 kHz from the PLL and can be scaled by a factor of 1, 16, or 256 (see Figure 66). Name T3LD Address 0xFFFF0360 Default Value 0x0000 Access R/W T3LD is a 16-bit register load register. T3VAL Register Name T3VAL Address 0xFFFF0364 Default Value 0xFFFF Access R T3VAL is a 16-bit read-only register that represents the current state of the counter. T3CON Register Name T3CON Address 0xFFFF0368 Default Value 0x0000 Access R/W T3CON is the configuration MMR described in Table 77. Rev. A | Page 78 of 92 ADuC7019/20/21/22/24/25/26/27 The value 0×00 should not be used as an initial seed due to the properties of the polynomial. The value 0×00 is always guaranteed to force an immediate reset. The value of the LFSR cannot be read; it must be tracked/generated in software. Table 77. T3CON MMR Bit Descriptions Bit 31:9 8 Value 7 6 5 4 3:2 00 01 10 11 1 0 Description Reserved. Count Up. Set by user for Timer3 to count up. Cleared by user for Timer3 to count down by default. Timer3 Enable Bit. Set by user to enable Timer3. Cleared by user to disable Timer3 by default. Timer3 Mode. Set by user to operate in periodic mode. Cleared by user to operate in free-running mode. Default mode. Watchdog Mode Enable Bit. Set by user to enable watchdog mode. Cleared by user to disable watchdog mode by default. Secure Clear Bit. Set by user to use the secure clear option. Cleared by user to disable the secure clear option by default. Prescale: Source Clock/1 by Default. Source Clock/16. Source Clock/256. Undefined. Equivalent to 00. Watchdog IRQ Option Bit. Set by user to produce an IRQ instead of a reset when the watchdog reaches 0. Cleared by user to disable the IRQ option. Reserved. Example of a sequence: 1. 2. 3. 4. 5. EXTERNAL MEMORY INTERFACING The ADuC7026 and ADuC7027 are the only models in their series that feature an external memory interface The external memory interface requires a larger number of pins. This is why it is only available on larger pin count packages. The XMCFG MMR must be set to 1 to use the external port. Although 32-bit addresses are supported internally, only the lower 16 bits of the address are on external pins. The memory interface can address up to four 128 kB of asynchronous memory (SRAM or/and EEPROM). The pins required for interfacing to an external memory are shown in Table 78. T3CLRI Register Name T3CLRI Table 78. External Memory Interfacing Pins Address 0xFFFF036C Default Value 0x00 Access W T3CLRI is an 8-bit register. Writing any value to this register clears the Timer3 interrupt in normal mode or resets a new timeout period in watchdog mode. Secure Clear Bit (Watchdog Mode Only) The secure clear bit is provided for a higher level of protection. When set, a specific sequential value must be written to T3ICLR to avoid a watchdog reset. The value is a sequence generated by the 8-bit linear feedback shift register (LFSR) polynomial = X8 + X6 + X5 + X + 1 as shown in Figure 67. D 7 Q D 6 Q D 5 Q D 4 Q D 3 Q D 2 Q D 1 Q D 0 04955-038 Q Enter initial seed, 0×AA, in T3ICLR before starting Timer3 in watchdog mode. Enter 0×AA in T3ICLR; Timer3 is reloaded. Enter 0×37 in T3ICLR; Timer3 is reloaded. Enter 0×6E in T3ICLR; Timer3 is reloaded. Enter 0×66. 0×DC was expected; the watchdog reset the chip. CLOCK Figure 67. 8-Bit LFSR Pin AD[15:0] A16 MS[3:0] WR RS AE BHE, BLE Function Address/Data Bus Extended Addressing for 8-Bit Memory Only Memory Select Pins Write Strobe Read Strobe Address Latch Enable Byte Write Capability There are four external memory regions available as described in Table 79. Associated with each region are the pins MS[3:0]. These signals allow access to the particular region of external memory. The size of each memory region can be 128 kB maximum, 64 k × 16 or 128 k × 8. To access 128 k with an 8-bit memory, an extra address line (A16) is provided. (See the example in Figure 68.) The four regions are configured independently. Table 79. Memory Regions The initial value or seed is written to T3ICLR before entering watchdog mode. After entering watchdog mode, a write to T3ICLR must match this expected value. If it matches, the LFSR is advanced to the next state when the counter reload happens. If it fails to match the expected state, reset is immediately generated, even if the count has not yet expired. Address Start 0x10000000 0x20000000 0x30000000 0x40000000 Address End 0x1000FFFF 0x2000FFFF 0x3000FFFF 0x4000FFFF Contents External Memory 0 External Memory 1 External Memory 2 External Memory 3 Each external memory region can be controlled through three MMRs: XMCFG, XMxCON, and XMxPAR. Rev. A | Page 79 of 92 ADuC7019/20/21/22/24/25/26/27 EPROM 64k × 16-BIT ADuC7026/ ADuC7027 XMxPAR Registers Name XM0PAR XM1PAR XM2PAR XM3PAR A16 AD15:0 D0–D15 LATCH A0:15 AE MS0 MS1 CS WS WE RS OE Bit 15 A16 A0:15 04955-039 CS 14:12 Figure 68. Interfacing to External EPROM/RAM 11 10 XMCFG Register Name XMCFG Address 0xFFFFF000 Default Value 0x00 Access R/W XMCFG is set to 1 to enable external memory access. This must be set to 1 before any port pins function as external memory access pins. The port pins must also be individually enabled via the GPxCON MMR. XMxCON Registers Name XM0CON XM1CON XM2CON XM3CON Address 0xFFFFF010 0xFFFFF014 0xFFFFF018 0xFFFFF01C Default Value 0x00 0x00 0x00 0x00 Access R/W R/W R/W R/W Table 80. XMxCON MMR Bit Descriptions 0 9 8 7:4 3:0 Description Enable Byte Write Strobe. This bit is only used for two, 8bit memory sharing the same memory region. Set by the user to gate the A0 output with the WR output. This allows byte write capability without using BHE and BLE signals. Cleared by user to use BHE and BLE signals. Number of wait states on the address latch enable strobe. Reserved. Extra Address Hold Time. Set by the user to disable extra hold time. Cleared by the user to enable one clock cycle of hold on the address in read and write. Extra bus transition time on read. Set by the user to disable extra bus transition time. Cleared by the user to enable one extra clock before and after the read strobe (RS). Extra Bus Transition Time On Write. Set by the user to disable extra bus transition time. Cleared by the user to enable one extra clock before and after the write strobe (WS). Number of Write Wait States. Select the number of wait states added to the length of the WS pulse. 0x0 is 1clock; 0xF is 16 clock cycles (default value). Number of Read Wait States. Select the number of wait states added to the length of the RS pulse. 0x0 is 1 clock; 0xF is 16 clock cycles (default value). Figure 69, Figure 70, Figure 71, and Figure 72 show the timing for a read cycle, a read cycle with address hold and bus turn cycles, a write cycle with address and write hold cycles, and a write cycle with wait sates, respectively. XMxCON are the control registers for each memory region. They allow the enabling/disabling of a memory region and control the data bus width of the memory region. Bit 1 Access R/W R/W R/W R/W Table 81. XMxPAR MMR Bit Descriptions D0–D7 OE Default Value 0x70FF 0x70FF 0x70FF 0x70FF XMxPAR are registers that define the protocol used for accessing the external memory for each memory region. RAM 128k × 8-BIT WE Address 0xFFFFF020 0xFFFFF024 0xFFFFF028 0xFFFFF02C Description Selects Between 8-Bit and 16-Bit Data Bus Width. Set by the user to select a 16-bit data bus. Cleared by the user to select an 8-bit data bus. Enables Memory Region. Set by the user to enable memory region. Cleared by the user to disable the memory region. Rev. A | Page 80 of 92 ADuC7019/20/21/22/24/25/26/27 MCLK AD16:0 ADDRESS DATA MSx 04955-040 AE RS Figure 69. External Memory Read Cycle MCLK AD16:0 ADDRESS DATA EXTRA ADDRESS HOLD TIME (BIT-10) MSx AE BUS TURN OUT CYCLE (BIT-9) BUS TURN OUT CYCLE (BIT-9) Figure 70. External Memory Read Cycle with Address Hold and Bus Turn Cycles Rev. A | Page 81 of 92 04955-041 RS ADuC7019/20/21/22/24/25/26/27 MCLK AD16:0 ADDRESS DATA EXTRA ADDRESS HOLD TIME (BIT-10) MSx AE WRITE HOLD ADDRESS AND DATA CYCLES (BIT-8) WRITE HOLD ADDRESS AND DATA CYCLES (BIT-8) 04955-042 WS Figure 71. External Memory Write Cycle with Address and Write Hold Cycles MCLK AD16:0 ADDRESS DATA MSx AE 1 ADDRESS WAIT STATE (BIT-14 TO BIT-12) 1 WRITE STROBE WAIT STATE (BIT-7 TO BIT-4) Figure 72. External Memory Write Cycle with Wait States Rev. A | Page 82 of 92 04955-043 WS ADuC7019/20/21/22/24/25/26/27 HARDWARE DESIGN CONSIDERATIONS POWER SUPPLIES The ADuC7019/7020/7021/7022/7024/7025/7026/7027 operational power supply voltage range is 2.7 V to 3.6 V. Separate analog and digital power supply pins (AVDD and IOVDD, respectively) allow AVDD to be kept relatively free of noisy digital signals often present on the system IOVDD line. In this mode, the part can also operate with split supplies, that is, using different voltage levels for each supply. For example, the system can be designed to operate with an IOVDD voltage level of 3.3 V while the AVDD level can be at 3 V, or vice versa. A typical split supply configuration is shown in Figure 73. DIGITAL SUPPLY + – ANALOG SUPPLY 10μF 10μF Linear Voltage Regulator + – Each ADuC7019/7020/7021/7022/7024/7025/7026/7027 requires a single 3.3 V supply, but the core logic requires a 2.6 V supply. An on-chip linear regulator generates the 2.6 V from IOVDD for the core logic. LVDD Pin 21 is the 2.6 V supply for the core logic. An external compensation capacitor of 0.47 μF must be connected between LVDD and DGND (as close as possible to these pins) to act as a tank of charge as shown Figure 75. ADuC7026 73 AVDD 74 26 54 IOVDD DACV DD 75 0.1μF 0.1μF GNDREF 8 DACGND 70 53 IOGND 04955-044 AGND 71 25 REFGND 67 Notice that in both Figure 73 and Figure 74, a large value (10 μF) reservoir capacitor sits on IOVDD, and a separate 10 μF capacitor sits on AVDD. In addition, local small-value (0.1 μF) capacitors are located at each AVDD and IOVDD pin of the chip. As per standard design practice, be sure to include all of these capacitors and ensure the smaller capacitors are close to each AVDD pin with trace lengths as short as possible. Connect the ground terminal of each of these capacitors directly to the underlying ground plane. Finally, note that the analog and digital ground pins on the ADuC7019/7020/7021/7022/ 7024/7025/7026/7027 must be referenced to the same system ground reference point at all times. ADuC7026 Figure 73. External Dual Supply Connections 27 LVDD As an alternative to providing two separate power supplies, the user can reduce noise on AVDD by placing a small series resistor and/or ferrite bead between AVDD and IOVDD, and then decouple AVDD separately to ground. An example of this configuration is shown in Figure 74. With this configuration, other analog circuitry (such as op amps, voltage reference, and others) can be powered from the AVDD supply line as well. BEAD DIGITAL SUPPLY + 10μF – ADuC7026 73 54 IOVDD 0.1μF 04955-046 28 DGND Figure 75. Voltage Regulator Connections The LVDD pin should not be used for any other chip. It is also recommended to use excellent power supply decoupling on IOVDD to help improve line regulation performance of the onchip voltage regulator. 1.6Ω 10μF 26 0.47μF AVDD 74 DACV DD 75 GNDREF 8 0.1μF DACGND 70 53 IOGND REFGND 67 04955-045 AGND 71 25 Figure 74. External Single Supply Connections Rev. A | Page 83 of 92 ADuC7019/20/21/22/24/25/26/27 GROUNDING AND BOARD LAYOUT RECOMMENDATIONS As with all high resolution data converters, special attention must be paid to grounding and PC board layout of ADuC7019/7020/7021/7022/7024/7025/7026/7027-based designs in order to achieve optimum performance from the ADCs and DAC. Although the ADuC7019/7020/7021/7022/7024/7025/7026/7027 have separate pins for analog and digital ground (AGND and IOGND), the user must not tie these to two separate ground planes unless the two ground planes are connected very close to the part. This is illustrated in the simplified example shown in Figure 76a. In systems where digital and analog ground planes are connected together somewhere else (at the system’s power supply, for example), the planes cannot be reconnected near the part, because a ground loop would result. In these cases, tie all the ADuC7019/7020/7021/7022/7024/7025/7026/7027’s AGND and IOGND pins to the analog ground plane, as illustrated in Figure 76b. In systems with only one ground plane, ensure that the digital and analog components are physically separated onto separate halves of the board so that digital return currents do not flow near analog circuitry and vice versa. The ADuC7019/7020/ 7021/7022/7024/7025/7026/7027 can then be placed between the digital and analog sections, as illustrated in Figure 76c. a. PLACE ANALOG COMPONENTS HERE PLACE DIGITAL COMPONENTS HERE AGND DGND For example, do not power components on the analog side, as seen in Figure 76b, with IOVDD because that would force return currents from IOVDD to flow through AGND. Also, avoid digital currents flowing under analog circuitry, which could occur if a noisy digital chip is placed on the left half of the board shown in Figure 76c. If possible, avoid large discontinuities in the ground plane(s) (such as those formed by a long trace on the same layer), because they force return signals to travel a longer path. In addition, make all connections to the ground plane directly, with little or no trace separating the pin from its via to ground. When connecting fast logic signals (rise/fall time < 5 ns) to any of the ADuC7019/7020/7021/7022/7024/7025/7026/7027’s digital inputs, add a series resistor to each relevant line to keep rise and fall times longer than 5 ns at the ADuC7019/7020/ 7021/7022/7024/7025/7026/7027 input pins. A value of 100 Ω or 200 Ω is usually sufficient enough to prevent high speed signals from coupling capacitively into the part and affecting the accuracy of ADC conversions. CLOCK OSCILLATOR The clock source for the ADuC7019/7020/7021/7022/ 7024/7025/7026/7027 can be generated by the internal PLL or by an external clock input. To use the internal PLL, connect a 32.768 kHz parallel resonant crystal between XCLKI and XCLKO, and connect a capacitor from each pin to ground as shown Figure 77. This crystal allows the PLL to lock correctly to give a frequency of 41.78 MHz. If no external crystal is present, the internal oscillator is used to give a frequency of 41.78 MHz ±3% typically. ADuC7026 XCLKI 45 12pF 44 b. c. PLACE ANALOG COMPONENTS HERE 12pF PLACE DIGITAL COMPONENTS HERE XCLKO TO INTERNAL PLL 04955-048 32.768kHz Figure 77. External Parallel Resonant Crystal Connections AGND DGND PLACE ANALOG COMPONENTS HERE PLACE DIGITAL COMPONENTS HERE To use an external source clock input instead of the PLL (see Figure 78), Bit 1 and Bit 0 of PLLCON must be modified.The external clock uses P0.7 and XCLK. ADuC7026 XCLKO EXTERNAL CLOCK SOURCE Figure 76. System Grounding Schemes XCLK TO FREQUENCY DIVIDER 04955-049 DGND 04955-047 XCLKI Figure 78. Connecting an External Clock Source In all of these scenarios, and in more complicated real-life applications, pay particular attention to the flow of current from the supplies and back to ground. Make sure the return paths for all currents are as close as possible to the paths the currents took to reach their destinations. Using an external clock source, the ADuC7019/7020/7021/ 7022/7024/7025/7026/7027’s specified operational clock speed range is 50 kHz to 44 MHz ±1% to ensure correct operation of the analog peripherals and Flash/EE. Rev. A | Page 84 of 92 ADuC7019/20/21/22/24/25/26/27 3.3V POWER-ON RESET OPERATION An internal power-on reset (POR) is implemented on the ADuC7019/7020/7021/7022/7024/7025/7026/7027. For LVDD below 2.35 V typical, the internal POR holds the part in reset. As LVDD rises above 2.35 V, an internal timer times out for typically 128 ms before the part is released from reset. The user must ensure that the power supply IOVDD has reached a stable 2.7 V minimum level by this time. Likewise, on power-down, the internal POR holds the ADuC7019/7020/7021/7022/ 7024/7025/7026/7027 in reset until LVDD has dropped below 2.35 V. IOVDD 2.6V 2.35V TYP 2.35V TYP LVDD 128ms TYP POR 04955-050 0.12ms TYP MRST Figure 79 illustrates the operation of the internal POR in detail. Figure 79. ADuC7019/7020/7021/7022/7024/7025/7026/7027 Internal Power-on Reset Operation TYPICAL SYSTEM CONFIGURATION A typical ADuC7020 configuration is shown in Figure 80. It summarizes some of the hardware considerations discussed in the previous sections. The bottom of the CSP package has an exposed pad that needs to be soldered to a metal plate on the board for mechanical reasons. The metal plate of the board can be connected to ground. + 10Ω – 0.01μF RS232 INTERFACE* 36 35 2 34 1 C1+ VCC 16 29 2 V+ GND 15 1 C1– T1OUT 14 2 4 DAC0 27 4 C2+ R1IN 13 3 26 5 C2– R1OUT 12 4 6 XCLKI 25 6 V– T1IN 11 5 7 XCLKO 24 7 T2OUT T2IN 10 6 8 R2IN R2OUT 9 7 ADuC7020 DGND TRST RST 22 LVDD TDI IOVDD 9 IOGND 23 TDO TMS TCK 8 12 13 14 15 16 17 18 19 DVDD 0.47μF 100kΩ DVDD 100kΩ 30 3 11 100kΩ STANDARD D-TYPE SERIAL COMMS CONNECTOR TO PC HOST ADM3202 28 1kΩ DVDD 32.768kHz 8 21 20 9 DVDD 1kΩ * EXTERNAL UART TRANSCEIVER INTEGRATED IN SYSTEM OR AS PART OF AN EXTERNAL DONGLE AS DESCRIBED IN uC006. AVDD DVDD 1.5Ω ADP3333-3.3 OUT TDI 270Ω TMS 10μF IN GND SD 10μF 0.1μF TCK TDO NOT CONNECTED IN THIS EXAMPLE 04955-051 JTAG CONNECTOR 31 GNDREF 10 P0.0 TRST 32 3 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 33 P1.1 1 37 P1.0 38 VREF 39 ADC0 40 AVDD DVDD AGND AVDD 0.47μF Figure 80. Typical System Configuration Rev. A | Page 85 of 92 ADuC7019/20/21/22/24/25/26/27 DEVELOPMENT TOOLS PC-BASED TOOLS Software Four types of development systems are available for the ADuC7019/7020/7021/7022/7024/7025/7026/7027 family: • Integrated development environment, incorporating assembler, compiler, and nonintrusive JTAG-based debugger • Serial downloader software • Example code • • The ADuC7026 QuickStart Plus is intended for new users who want to have a comprehensive hardware development environment. Since the ADuC7026 contains the superset of functions available on the ADuC7019/7020/7021/ 7022/7024/7025/7026/7027 family, it is suitable for users who wish to develop on any of the parts in this family. All of the parts are fully code compatible. Miscellaneous • CD-ROM documentation IN-CIRCUIT SERIAL DOWNLOADER The ADuC7020, ADuC7024, and ADuC7026 QuickStart are intended for users who already have an emulator. These systems consist of the following PC-based (Windows® compatible) hardware and software development tools: Hardware • ADuC7019/7020/7021/7022/7024/7025/7026/7027 evaluation board • Serial port programming cable • RDI compliant JTAG emulator (included in the ADuC7026 QuickStart Plus only) The serial downloader is a Windows application that allows the user to serially download an assembled program to the on-chip program Flash/EE memory via the serial port on a standard PC. The UART based serial downloader is included in all the development systems and is usable with ADuC7019/7020/7021/ 7022/7024/7025/7026/7027 that do not contain the “I” suffix in the ordering guide. An I2C based serial downloader is also available at www.analog.com. This software requires an USB to I2C adaptor board available from http://www.fh-pforzheim.de/ stw-svs/texte/Dongle.html. The I2C based serial downloader is only usable with the part models containing the “I” suffix in the ordering guide. Rev. A | Page 86 of 92 ADuC7019/20/21/22/24/25/26/27 OUTLINE DIMENSIONS 6.00 BSC SQ 0.60 MAX 0.60 MAX PIN 1 INDICATOR 31 30 PIN 1 INDICATOR TOP VIEW 0.50 BSC 5.75 BCS SQ 1.00 0.85 0.80 4.25 4.10 SQ 3.95 EXPOSED PAD (BOTTOM VIEW) 0.50 0.40 0.30 12° MAX 40 1 21 20 10 11 0.25 MIN 4.50 REF 0.80 MAX 0.65 TYP 0.05 MAX 0.02 NOM SEATING PLANE 0.30 0.23 0.18 0.20 REF COPLANARITY 0.08 COMPLIANT TO JEDEC STANDARDS MO-220-VJJD-2 Figure 81. 40-Lead Frame Chip Scale Package [LFCSP_VQ] 6 mm x 6 mm Body, Very Thin Quad (CP-40) Dimensions shown in millimeters 9.00 BSC SQ 0.60 MAX PIN 1 INDICATOR *4.85 4.70 SQ 4.55 0.45 0.40 0.35 33 32 16 17 7.50 REF 0.80 MAX 0.65 TYP 0.05 MAX 0.02 NOM 0.50 BSC 0.20 REF *COMPLIANT TO JEDEC STANDARDS MO-220-VMMD-4 EXCEPT FOR EXPOSED PAD DIMENSION Figure 82. 64-Lead Frame Chip Scale Package [LFCSP_VQ] 9 mm x 9 mm Body, Very Thin Quad (CP-64-1) Dimensions shown in millimeters Rev. A | Page 87 of 92 112805-0 SEATING PLANE 1 8.75 BSC SQ TOP VIEW 12° MAX 64 49 48 PIN 1 INDICATOR 1.00 0.85 0.80 0.30 0.25 0.18 0.60 MAX ADuC7019/20/21/22/24/25/26/27 0.75 0.60 0.45 12.00 BSC SQ 1.60 MAX 64 49 1 48 PIN 1 10.00 BSC SQ TOP VIEW (PINS DOWN) 1.45 1.40 1.35 0.15 0.05 SEATING PLANE 0.20 0.09 7° 3.5° 0° 0.08 MAX COPLANARITY 16 33 32 17 VIEW A VIEW A 0.27 0.22 0.17 0.50 BSC LEAD PITCH ROTATED 90° CCW COMPLIANT TO JEDEC STANDARDS MS-026-BCD Figure 83. 64-Lead Low Profile Quad Flat Package [LQFP] (ST-64-2) Dimensions shown in millimeters 0.75 0.60 0.45 14.00 BSC SQ 1.60 MAX 80 61 60 1 PIN 1 12.00 BSC SQ TOP VIEW (PINS DOWN) 1.45 1.40 1.35 0.15 0.05 SEATING PLANE 0.20 0.09 7° 3.5° 0° 0.08 MAX COPLANARITY 20 41 21 VIEW A VIEW A 0.50 BSC LEAD PITCH ROTATED 90° CCW 40 0.27 0.22 0.17 COMPLIANT TO JEDEC STANDARDS MS-026-BDD Figure 84. 80-Lead Low Profile Quad Flat Package [LQFP] (ST-80-1) Dimensions shown in millimeters Rev. A | Page 88 of 92 ADuC7019/20/21/22/24/25/26/27 ORDERING GUIDE Model ADuC7019BCPZ62I 1 ADC Channels 52 DAC Channels 3 FLASH/RAM 62 kB/8 kB GPIO 14 Downloader I2C ADuC7019BCPZ62I-RL1 52 3 62 kB/8 kB 14 I2C ADuC7019BCPZ62IRL71 52 3 62 kB/8 kB 14 I2C ADuC7020BCPZ621 5 4 62 kB/8 kB 14 UART ADuC7020BCPZ62-RL1 5 4 62 kB/8 kB 14 UART ADuC7020BCPZ62RL71 ADuC7020BCPZ62I1 5 4 62 kB/8 kB 14 UART 5 4 62 kB/8 kB 14 I2C ADuC7020BCPZ62I-RL1 5 4 62 kB/8 kB 14 I2C ADuC7020BCPZ62IRL71 5 4 62 kB/8 kB 14 I2C ADuC7021BCPZ621 8 2 62 kB/8 kB 13 UART ADuC7021BCPZ62-RL1 8 2 62 kB/8 kB 13 UART ADuC7021BCPZ62RL71 ADuC7021BCPZ62I1 8 2 62 kB/8 kB 13 UART 8 2 62 kB/8 kB 13 I2C ADuC7021BCPZ62I-RL1 8 2 62 kB/8 kB 13 I2C ADuC7021BCPZ62IRL71 8 2 62 kB/8 kB 13 I2C ADuC7021BCPZ321 8 2 32 kB/4 kB 13 UART ADuC7021BCPZ32-RL1 8 2 32 kB/4 kB 13 UART ADuC7021BCPZ32RL71 8 2 32 kB/4 kB 13 UART ADuC7022BCPZ621 10 62 kB/8 kB 13 UART ADuC7022BCPZ62-RL1 10 62 kB/8 kB 13 UART ADuC7022BCPZ62RL71 ADuC7022BCPZ321 10 62 kB/8 kB 13 UART 10 32 kB/4 kB 13 UART ADuC7022BCPZ32-RL1 10 32 kB/4 kB 13 UART ADuC7022BCPZ32RL71 10 32 kB/4 kB 13 UART ADuC7024BCPZ621 10 2 62 kB/8 kB 30 UART ADuC7024BCPZ62-RL1 10 2 62 kB/8 kB 30 UART ADuC7024BCPZ62RL71 ADuC7024BSTZ621 10 2 62 kB/8 kB 30 UART 10 2 62 kB/8 kB 30 UART ADuC7024BSTZ62-RL1 10 2 62 kB/8 kB 30 UART Rev. A | Page 89 of 92 Temperature Range −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C Package Description 40-Lead LFCSP_VQ Package Option CP-40 Ordering Quantity 40-Lead LFCSP_VQ CP-40 2,500 40-Lead LFCSP_VQ CP-40 750 40-Lead LFCSP_VQ CP-40 40-Lead LFCSP_VQ CP-40 2,500 40-Lead LFCSP_VQ CP-40 750 40-Lead LFCSP_VQ CP-40 40-Lead LFCSP_VQ CP-40 2,500 40-Lead LFCSP_VQ CP-40 750 40-Lead LFCSP_VQ CP-40 40-Lead LFCSP_VQ CP-40 2,500 40-Lead LFCSP_VQ CP-40 750 40-Lead LFCSP_VQ CP-40 40-Lead LFCSP_VQ CP-40 2,500 40-Lead LFCSP_VQ CP-40 750 40-Lead LFCSP_VQ CP-40 40-Lead LFCSP_VQ CP-40 2,500 40-Lead LFCSP_VQ CP-40 750 40-Lead LFCSP_VQ CP-40 40-Lead LFCSP_VQ CP-40 2,500 40-Lead LFCSP_VQ CP-40 750 40-Lead LFCSP_VQ CP-40 40-Lead LFCSP_VQ CP-40 2,500 40-Lead LFCSP_VQ CP-40 750 64-Lead LFCSP_VQ CP-64-1 64-Lead LFCSP_VQ CP-64-1 2,500 64-Lead LFCSP_VQ CP-64-1 750 64-Lead LQFP ST-64-2 64-Lead LQFP ST-64-2 1,000 ADuC7019/20/21/22/24/25/26/27 ADuC7025BCPZ621 ADC Channels 12 ADuC7025BCPZ62-RL1 12 62 kB/8 kB 30 UART ADuC7025BCPZ62RL71 ADuC7025BCPZ321 12 62 kB/8 kB 30 UART 12 32 kB/4 kB 30 UART ADuC7025BCPZ32-RL1 12 32 kB/4 kB 30 UART ADuC7025BCPZ32RL71 ADuC7025BSTZ621 12 32 kB/4 kB 30 UART 12 62 kB/8 kB 30 UART ADuC7025BSTZ62-RL1 12 62 kB/8 kB 30 UART ADuC7026BSTZ621, 3 12 4 62 kB/8 kB 40 UART ADuC7026BSTZ62-RL1, 3 12 4 62 kB/8 kB 40 UART ADuC7026BSTZ62I1, 3 12 4 62 kB/8 kB 40 I2C ADuC7026BSTZ62I-RL1, 12 4 62 kB/8 kB 40 I2C Model DAC Channels FLASH/RAM 62 kB/8 kB GPIO 30 Downloader UART 3 ADuC7027BSTZ621, 3 16 62 kB/8 kB 40 UART ADuC7027BSTZ62-RL1, 3 16 62 kB/8 kB 40 UART EVAL-ADuC7020MK EVAL-ADuC7020QS Temperature Range −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C Package Description 64-Lead LFCSP_VQ Package Option CP-64-1 Ordering Quantity 64-Lead LFCSP_VQ CP-64-1 2,500 64-Lead LFCSP_VQ CP-64-1 750 64-Lead LFCSP_VQ CP-64-1 64-Lead LFCSP_VQ CP-64-1 2,500 64-Lead LFCSP_VQ CP-64-1 750 64-Lead LQFP ST-64-2 64-Lead LQFP ST-64-2 80-Lead LQFP ST-80-1 80-Lead LQFP ST-80-1 80-Lead LQFP ST-80-1 80-Lead LQFP ST-80-1 80-Lead LQFP ST-80-1 80-Lead LQFP ST-80-1 ADuC7020 MiniKit ADuC7020 QuickStart Development System ADuC7024 QuickStart Development System ADuC7026 QuickStart Development System ADuC7026 QuickStart Plus Development System EVAL-ADuC7024QS EVAL-ADuC7026QS EVAL-ADuC7026QSP 1 Z = Pb-free part. One of the ADC channels is internally buffered. 3 Includes external memory interface. 2 Rev. A | Page 90 of 92 1,000 1,000 1,000 1,000 ADuC7019/20/21/22/24/25/26/27 NOTES Rev. A | Page 91 of 92 ADuC7019/20/21/22/24/25/26/27 NOTES Purchase of licensed I2C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips. ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04955-0-1/06(A) Rev. A | Page 92 of 92