AT8xC5122/23

目录

功能................................................. ................................................ 1

参考文献................................................ .......................................... 2

产品说明................................................ .............................................. 3

AT8xC5122框图............................................... ................................... 5

AT83C5123框图............................................... ................................... 5

引脚排列................................................. .................................................. 6

高引脚数封装说明............................................. ....................... 6

低引脚数封装说明............................................. ..................... 11

针Description.................................................................................................... 13

典型应用................................................ ........................... 17

推荐的外部元件............................................... .................. 17

USB键盘与智能卡读卡器使用AT8xC5122和AT89C5122DS ver-

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

USB智能卡读卡器采用AT83C5123版本.................................... 19

存储器结构................................................ ......................... 20

程序存储器Managament ............................................... ........................... 20

数据存储器Managament ............................................... ................................. 21

双数据指针寄存器（ DDPTR ） ........................................... ...................... 22

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

AT8xC5122的CRAM和E2PROM版本............................................. ........ 26

AT8xC5122的ROM版本............................................... ................................. 30

AT83C5123版本................................................ ............................................ 32

特殊功能寄存器（SFR ） ............................................ ...... 33

介绍.........................................................................................................

AT8xC5122版本................................................ ............................................

AT83C5123版本................................................ ...........................................

SFR的说明................................................ ...............................................

33

34

35

36

时钟控制器................................................ .................................. 41

片上振荡器.............................................. ................................................

锁相环（ PLL） ............................................ ..........................................

时钟树结构............................................... .......................................

Registers.............................................................................................................

41

42

43

50

I / O端口定义............................................. .................................. 53

端口Configuration............................................................................................... 57

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

智能卡接口模块（ SCIB ） ........................................... ........ 64

框图................................................ .................................................. 65 ..

210

4202D–SCR–06/05