ADuC7019/20/21/22/24/25/26/27
TABLE OF CONTENTS
Features .............................................................................................. 1
Transfer Function....................................................................... 37
Typical Operation....................................................................... 38
MMRs Interface.......................................................................... 38
Converter Operation.................................................................. 40
Driving the Analog Inputs ........................................................ 42
Calibration................................................................................... 42
Temperature Sensor ................................................................... 42
Band Gap Reference................................................................... 42
Nonvolatile Flash/EE Memory ..................................................... 43
Programming.............................................................................. 43
Security ........................................................................................ 44
Flash/EE Control Interface ....................................................... 44
Execution Time from SRAM and Flash/EE............................ 46
Reset and Remap........................................................................ 46
Other Analog Peripherals.............................................................. 48
DAC.............................................................................................. 48
Power Supply Monitor............................................................... 49
Comparator................................................................................. 50
Oscillator and PLL—Power Control........................................ 51
Digital Peripherals.......................................................................... 53
Three-Phase PWM..................................................................... 53
General-Purpose Input/Output................................................ 60
Serial Port Mux........................................................................... 62
UART Serial Interface................................................................ 62
Serial Peripheral Interface......................................................... 65
I2C Compatible Interfaces ......................................................... 67
Programmable Logic Array (PLA)........................................... 71
Processor Reference Peripherals................................................... 74
Interrupt System......................................................................... 74
Timers.......................................................................................... 75
External Memory Interfacing ................................................... 79
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 Access........................................................................... 33
Flash/EE Memory....................................................................... 33
SRAM........................................................................................... 33
Memory Mapped Registers ....................................................... 33
ADC Circuit Overview.................................................................. 37
Rev. A | Page 2 of 92
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