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ADuC7019/20/21/22/24/25/26/27
TABLE OF CONTENTS
Features..............................................................................................1
Rev. A | Page 2 of 92
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
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
I
2
C Compatible Interfaces......................................................... 67
Programmable Logic Array (PLA)...........................................71
Processor Reference Peripherals................................................... 74
Interrupt System......................................................................... 74
Timers.......................................................................................... 75
External Memory Interfacing................................................... 79