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ADuC841/ADuC842/ADuC843
TABLE OF CONTENTS
Specifications.....................................................................................3
Rev. 0 | Page 2 of 88
Absolute Maximum Ratings............................................................8
ESD Caution..................................................................................8
Pin Configurations and Functional Descriptions........................9
Terminology....................................................................................11
ADC Specifications....................................................................11
DAC Specifications.....................................................................11
Typical Performance Characteristics...........................................12
Functional Description..................................................................16
8052 Instruction Set...................................................................16
Other Single-Cycle Core Features............................................18
Memory Organization...............................................................19
Special Function Registers (SFRs)............................................20
Accumulator SFR (ACC)...........................................................21
Special Function Register Banks..............................................22
ADC Circuit Information..........................................................23
Calibrating the ADC..................................................................30
Nonvolatile Flash/EE Memory.................................................31
Using Flash/EE Data Memory..................................................34
User Interface to On-Chip Peripherals....................................38
On-Chip PLL...............................................................................41
Pulse-Width Modulator (PWM).............................................. 42
Serial Peripheral Interface (SPI)............................................... 45
I
2
C Compatible Interface........................................................... 48
Dual Data Pointer....................................................................... 51
Power Supply Monitor............................................................... 52
Watchdog Timer......................................................................... 53
Time Interval Counter (TIC).................................................... 54
8052 Compatible On-Chip Peripherals................................... 57
Timer/Counter 0 and 1 Operating Modes.............................. 62
Timer/Counter Operating Modes............................................ 64
UART Serial Interface................................................................ 65
SBUF ............................................................................................ 65
Interrupt System......................................................................... 70
Hardware Design Considerations............................................ 72
Other Hardware Considerations.............................................. 76
Development Tools.................................................................... 77
QuickStart Development System............................................. 77
Timing Specifications
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.................................................................. 78
Outline Dimensions....................................................................... 86
Ordering Guides......................................................................... 87
REVISION HISTORY
Revision 0: Initial Version