FEATURESAPPLICATIONSFUNCTIONAL BLOCK DIAGRAMTABLE OF CONTENTSREVISION HISTORYGENERAL DESCRIPTIONDETAILED BLOCK DIAGRAMSPECIFICATIONS TIMING SPECIFICATIONSABSOLUTE MAXIMUM RATINGSESD CAUTIONPIN CONFIGURATIONS AND FUNCTION DESCRIPTIONSADuC7019/ADuC7020/ADuC7021/ADuC7022ADuC7024/ADuC7025ADuc7026/ADuc7027TYPICAL PERFORMANCE CHARACTERISTICSTERMINOLOGYADC SPECIFICATIONSDAC SPECIFICATIONSOVERVIEW OF THE ARM7TDMI CORETHUMB MODE (T)LONG MULTIPLY (M)EMBEDDEDICE (I)EXCEPTIONSARM REGISTERS INTERRUPT LATENCYMEMORY ORGANIZATIONMEMORY ACCESSFLASH/EE MEMORYSRAMMEMORY MAPPED REGISTERS ADC CIRCUIT OVERVIEW TRANSFER FUNCTIONTYPICAL OPERATIONMMRS INTERFACECONVERTER OPERATIONDRIVING THE ANALOG INPUTSCALIBRATIONTEMPERATURE SENSORBAND GAP REFERENCENONVOLATILE FLASH/EE MEMORYPROGRAMMINGSECURITYFLASH/EE CONTROL INTERFACEEXECUTION TIME FROM SRAM AND FLASH/EERESET AND REMAPOTHER ANALOG PERIPHERALS DAC POWER SUPPLY MONITOR COMPARATOR OSCILLATOR AND PLL—POWER CONTROLDIGITAL PERIPHERALS THREE-PHASE PWMGENERAL-PURPOSE INPUT/OUTPUTSERIAL PORT MUXUART SERIAL INTERFACESERIAL PERIPHERAL INTERFACEI2C COMPATIBLE INTERFACESPROGRAMMABLE LOGIC ARRAY (PLA)PROCESSOR REFERENCE PERIPHERALS INTERRUPT SYSTEMTIMERSEXTERNAL MEMORY INTERFACINGHARDWARE DESIGN CONSIDERATIONS POWER SUPPLIES GROUNDING AND BOARD LAYOUT RECOMMENDATIONSCLOCK OSCILLATORPOWER-ON RESET OPERATIONTYPICAL SYSTEM CONFIGURATIONDEVELOPMENT TOOLS PC-BASED TOOLSIN-CIRCUIT SERIAL DOWNLOADEROUTLINE DIMENSIONS ORDERING GUIDEPrecision Analog Microcontroller 12-bit Analog I/O, ARM7TDMI® MCU ADuC7019/20/21/22/24/25/26/27 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 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 APPLICATIONS Industrial control and automation systems Smart sensors, precision instrumentation Base station systems, optical networking FUNCTIONAL BLOCK DIAGRAM 04955-0011MSPS12-BIT ADCDAC012-BITDACDAC112-BITDACDAC212-BITDACDAC312-BITDACPWM0HPWM0LPWM1HPWM1LPWM2HPWM2LTHREE-PHASEPWMEXT. MEMORYINTERFACEADuC7026ADC0XCLKIXCLKORSTVREFADC11MUXTEMPSENSORBANDGAPREFOSCAND PLLPSMPORCMP0CMP1CMPOUTPLA4 GENERALPURPOSE TIMERS2k × 32 SRAM31k × 16 FLASH/EEPROMSERIAL I/OUART, SPI, I2CGPIOJTAGARM7TDMI-BASED MCU WITHADDITIONAL PERIPHERALS 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 Rev. A | Page 2 of 92 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 3 General Description......................................................................... 4 Detailed Block Diagram .............................................................. 5 Specifications..................................................................................... 6 Timing Specifications .................................................................. 9 Absolute Maximum Ratings.......................................................... 16 ESD Caution................................................................................ 16 Pin Configurations and Function Descriptions ......................... 17 ADuC7019/ADuC7020/ADuC7021/ADuC7022 .................. 17 ADuC7024/ADuC7025 ............................................................. 20 ADuC7026/ADuC7027 ............................................................. 23 Typical Performance Characteristics ........................................... 27 Terminology .................................................................................... 30 ADC Specifications .................................................................... 30 DAC Specifications..................................................................... 30 Overview of the ARM7TDMI Core............................................. 31 Thumb Mode (T)........................................................................ 31 Long Multiply (M)...................................................................... 31 EmbeddedICE (I) ....................................................................... 31 Exceptions ................................................................................... 31 ARM Registers ............................................................................ 31 Interrupt Latency........................................................................ 32 Memory Organization ................................................................... 33 Memory