W79E825A / 824A / 823B / 822B数据表

8位微控制器

表盒内的

1

2

3

4

5

6

概述......................................................................................................... 4

特点.................................................................................................................................五

配件信息列表..................................................................................................... 6

3.1

无铅（ RoHS）的零件信息列表.......................................... ............................... 6

引脚配置............................................................................................................... 7

PIN DESCRIPTION..................................................................................................................... 8

功能DESCRIPTION.................................................................................................... 9

6.1

片内Flash EPROM ............................................. .................................................. 9 ...

6.2

I / O Ports.......................................................................................................................... 9

6.3

串行I / O ......................................................................................................................... 9

6.4

计时器............................................................................................................................. 9

6.5

Interrupts......................................................................................................................... 9

6.6

数据指针.................................................................................................................. 9

6.7

Architecture................................................................................................................... 10

6.7.1

6.7.2

6.7.3

6.7.4

6.7.5

6.7.6

ALU ................................................................................................................................10

累加器...................................................................................................................10

B Register.......................................................................................................................10

程序状态字： ....................................................................................................10

便签RAM ...........................................................................................................10

堆栈指针..................................................................................................................11

7

8

9

10

11

6.8

动力Management...................................................................................................... 11

记忆ORGANIZATION...................................................................................................... 12

7.1

程序存储器（片上闪存） .......................................... ....................................... 12

7.2

数据存储器................................................................................................................ 12

7.3

注册Map................................................................................................................. 13

7.4

工作Registers......................................................................................................... 16

7.5

位寻址Locations............................................................................................. 16

7.6

堆............................................................................................................................. 16

特殊功能寄存器............................................... .......................................... 17

指令SET.................................................................................................................. 48

9.1

指令Timing.......................................................................................................... 56

电源MANAGEMENT.......................................................................................................... 59

10.1空闲模式...................................................................................................................... 59

10.2掉电模式....................................................................................................... 59

RESET CONDITIONS............................................................................................................... 60

11.1来源reset............................................................................................................ 60

11.1.1

外部复位..............................................................................................................60

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出版日期： 2008年2月21日

修订A9

W79E825A / 824A / 823B / 822B数据表

11.1.2

11.1.3

上电复位(POR)................................................................................................60

看门狗定时器Reset.................................................................................................60

12

13

11.2复位状态................................................................................................................... 60

中断........................................................................................................................... 65

12.1中断源.......................................................................................................... 65

12.2优先级结构.............................................. .................................................. 67

12.3回应Time............................................................................................................. 68

12.4中断Inputs.............................................................................................................. 69

可编程定时器/计数器.............................................. ................................. 71

13.1定时器/计数器0 & 1.................................................................................................... 71

13.1.1

13.1.2

13.1.3

13.1.4

13.1.5

时基选择....................................................................................................71

模式0 .........................................................................................................................71

模式1 .........................................................................................................................72

模式2 .........................................................................................................................73

模式3 .........................................................................................................................73

14

15

16

17

18

19

20

21

22

23

NVM记忆......................................................................................................................... 75

看门狗TIMER................................................................................................................. 77

15.1看门狗CONTROL.............................................................................................. 78

看门狗15.2时钟控制............................................. ..................................... 79

串口（ UART ） ............................................................................................................. 80

16.1 MODE 0 ........................................................................................................................ 80

16.2 MODE 1 ........................................................................................................................ 81

16.3 MODE 2 ........................................................................................................................ 83

16.4 MODE 3 ........................................................................................................................ 84

16.5帧错误检测.............................................. ................................................. 85

16.6多机通信............................................... .................................... 85

实时访问保护整............................................... ............................................... 87

键盘中断（ KBI ） ............................................. .................................................. 89

模拟比较器...................................................................................................... 90

I / O端口配置............................................. .................................................. .... 91

20.1准双向口输出配置............................................ ......................... 91

20.2开漏输出配置............................................. .................................... 92

20.3推挽输出配置............................................ ........................................ 93

20.4仅输入配置.............................................. ................................................. 93

振荡器........................................................................................................................... 94

21.1片内RC振荡器选项........................................... ............................................ 94

21.2外部时钟输入选项............................................. ............................................. 95

21.3 CPU时钟频率选择............................................. .................................................. .. 95

电源监视功能............................................... ......................................... 96

22.1开机Detect........................................................................................................... 96

22.2欠压检测........................................................................................................... 96

脉冲宽度调制（ PWM）输出......................................... .......................... 97

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W79E825A / 824A / 823B / 822B数据表

24

25

模拟数字转换器............................................ ........................................ 101

24.1 ADC的解析度和模拟电源： ........................................... ............................... 102

I2C串行控制.......................................................................................................... 104

25.1 SIO端口...................................................................................................................... 104

25.2 I2C控制寄存器： ............................................ ............................................. 105

25.2.1

25.2.2

25.2.3

25.2.4

25.2.5

地址寄存器， I2ADDR ............................................. ................................... 105

数据寄存器， I2DAT ............................................. ............................................. 105

控制寄存器， I2CON ............................................. ........................................ 106

状态寄存器， I2STATUS ............................................. .................................... 106

I2C时钟波特率位， I2CLK .......................................... .............................. 106

主发送器方式............................................... ............................................ 107

主机接收模式............................................... ................................................ 107

从机接收模式............................................... .................................................. 107

从机发送模式............................................... .............................................. 108

25.3

操作模式............................................... .................................................. ... 107

25.3.1

25.3.2

25.3.3

25.3.4

26

27

28

29

30

在五种操作模式25.4数据传输流量.......................................... ................... 108

ICP （在电路PROGRAM ）闪存程序......................................... ....................... 114

配置位......................................................................................................................... 115

27.1 CONFIG1 .................................................................................................................... 115

27.2 CONFIG2 .................................................................................................................... 116

电气CHARACTERISTICS....................................................................................... 118

28.1绝对最大额定值.............................................. .......................................... 118

28.2 DC电气特性.............................................. ...................... 119

28.3 ADC转换器的直流电气特性................................... 121

28.4比较器电气特性........................................ 121

28.5 AC电气特性.............................................. ...................... 121

28.6外部时钟特性.............................................. .................. 122

28.7 AC规格............................................... .................................................. 。 122

28.8典型应用电路.............................................. ............................ 122

包装尺寸....................................................................................................... 123

29.1 20引脚SOP ................................................................................................................. 123

29.2 20引脚DIP ................................................................................................................... 124

修订历史.............................................................................................................. 125

-3-

出版日期： 2008年2月21日

修订A9

W79E825A / 824A / 823B / 822B数据表

1

概述

W79E82X系列是一个8位快速51微控制器，它具有在系统可编程

闪存EPROM的Flash EPROM可通过ICP编程（在电路编程）或

五金

作家。

在W79E82X系列的指令集与标准8052的W79E825完全兼容

系列包含

16K/8K/4K/2K

主Flash EPROM的字节;一

256/128

字节的RAM ;

256/128

字节

NVM数据Flash EPROM ; 2个8位双向， 1个2位双向可位寻址的I / O

端口;两个16位定时器/计数器; 4路10位A / D转换; 4路10位PWM ;两

串行端口，包括一个I2C和一个增强型全双工串行口。这些外设

13源4级中断能力的支持。为了方便用户进行编程和验证，该

在W79E825系列里面的Flash EPROM允许程序存储器进行编程和读取

电子化。一旦代码确定后，用户可进行保护的代码。

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W79E825A / 824A / 823B / 822B数据表

2

特点

全静态设计8位的Turbo 51的CMOS单片机高达20MHz时， VDD = 4.5V至5.5V ，

为12MHz时， VDD = 2.7V至5.5V

16K/8K/4K/2K

美联社的Flash EPROM字节， ICP和外部作家可编程模式。

256/128

字节片上RAM 。

256/128

字节NVM数据Flash EPROM所使用的客户数据存储和10K作家周期。

指令集兼容MSC- 51 。

两个8位双向和1个2位双向端口。

2个16位定时器/计数器。

13中断源， 4个优先级。

一个增强型全双工串口与帧错误检测和自动地址端口

识别。

4个输出模式和TTL /施密特触发器可选端口。

可编程看门狗定时器。

四通道10位PWM （脉冲宽度调制） 。

四通道复用的10位A / D转换。

一个I2C通信接口（主/从） 。

8个键盘中断输入。

两个模拟比较器。

可配置的片内振荡器。

所有端口引脚的LED驱动能力（ 20mA）的。

低电压检测中断和复位。

开发工具：

- JTAG ICE （在线仿真器）工具

- ICP （在电路编程）作家

包：

- 无铅（ RoHS）的DIP 20 ：

W79E825ADG

- 无铅（ RoHS）的DIP 20 ：

W79E825ADG

- 无铅（ RoHS）的SOP 20 ：

W79E825ASG

- 无铅（ RoHS）的DIP 20 ：

W79E824ADG

- 无铅（ RoHS）的SOP 20 ：

W79E824ASG

- 无铅（ RoHS）的DIP 20 ：

W79E823BDG

- 无铅（ RoHS）的SOP 20 ：

W79E823BSG

- 无铅（ RoHS）的DIP 20 ：

W79E822BDG

- 无铅（ RoHS）的SOP 20 ：

W79E822BSG

-5-

出版日期： 2008年2月21日

修订A9