AT89C51ID2-RDTIM datasheet(156/159 Pages) ATMEL

156 / 159 page

156

AT89C51ID2

4289A–8051–09/03

Table of Contents

Features................................................................................................. 1

Description ............................................................................................ 1

Block Diagram....................................................................................... 3

SFR Mapping ......................................................................................... 4

Pin Configurations.............................................................................. 10

Oscillators ........................................................................................... 15

Overview............................................................................................................. 15

Registers............................................................................................................. 15

Functional Block Diagram................................................................................... 18

............................................................................................................................ 18

Operating Modes ................................................................................................ 18

Design Considerations........................................................................................ 20

Timer 0: Clock Inputs.......................................................................................... 21

Enhanced Features............................................................................. 22

X2 Feature .......................................................................................................... 22

Dual Data Pointer Register DPTR...................................................... 26

Expanded RAM (XRAM) ..................................................................... 29

Registers............................................................................................................. 31

Reset .................................................................................................... 32

Introduction ......................................................................................................... 32

Reset Input ......................................................................................................... 32

Reset Output....................................................................................................... 33

Power Monitor..................................................................................... 34

Description.......................................................................................................... 34

Timer 2 ................................................................................................. 36

Auto-Reload Mode.............................................................................................. 36

Programmable Clock-Output .............................................................................. 37

Registers............................................................................................................. 39

Programmable Counter Array PCA ................................................... 41

PCA Capture Mode............................................................................................. 49

16-bit Software Timer/ Compare Mode............................................................... 49

High Speed Output Mode ................................................................................... 50

AT89C51ID2-RDTIM Datasheet(PDF) 156 Page - ATMEL Corporation