Rainbow-electronics AT89C5122 Bedienungsanleitung PDF herunterladen (Seite 210)

210

4202E–SCR–06/06

AT8xC5122/23

Table of Contents

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

Reference Documents.......................................................................................... 2

Product Description .............................................................................................. 3

AT8xC5122 Block Diagram .................................................................................. 5

AT83C5123 Block Diagram ..................................................................................5

Pinout .................................................................................................... 6

High Pin Count Package Description.................................................................... 6

Low Pin Count Package Description .................................................................. 11

Pin Description.................................................................................................... 13

Typical Applications ........................................................................... 17

Recommended External components .................................................................17

USB Keyboard with Smart Card Reader Using the AT8xC5122 and AT89C5122DS Ver-

sions............................................................................................................................. 18

USB Smart Card Reader Using the AT83C5123 Version................................... 19

Memory Organization ......................................................................... 20

Program Memory Managament.......................................................................... 20

Data Memory Managament ................................................................................ 21

Dual Data Pointer Register (DDPTR)................................................................. 22

Registers............................................................................................................. 24

AT8xC5122’s CRAM and E2PROM Versions ....................................................26

AT8xC5122’s ROM Version................................................................................ 30

AT83C5123 Version ........................................................................................... 32

Special Function Registers (SFR’s) .................................................. 33

Introduction......................................................................................................... 33

AT8xC5122 Version............................................................................................ 34

AT83C5123 Version ........................................................................................... 35

SFR’s Description............................................................................................... 36

Clock Controller .................................................................................. 41

On-Chip Oscillator .............................................................................................. 41

Phase Lock Loop (PLL) ...................................................................................... 42

Clock Tree Architecture...................................................................................... 43

Registers............................................................................................................. 50

I/O Port Definition ............................................................................... 53

Port Configuration............................................................................................... 57

Registers............................................................................................................. 61

Smart Card Interface Block (SCIB) ................................................... 64

Block Diagram .................................................................................................... 65

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Rainbow-electronics AT89C5122 Bedienungsanleitung Seite 210