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Megawin

MA803AS Datasheet Preview

MA803AS Datasheet

single-chip microprocessor

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MEGAWIN
MAKE YOU WIN
MA803
数据手册
版本 1.04
MA803
This document information is the intellectual property of Megawin Technology.
© Megawin Technology Co., Ltd. 2009 All rights reserved.
QP-7300-03D
1/75




Megawin

MA803AS Datasheet Preview

MA803AS Datasheet

single-chip microprocessor

No Preview Available !

MEGAWIN
MAKE YOU WIN
MA803
目录
1. 概述 ..............................................................................................................5
2. 功能 ..............................................................................................................6
3. 引脚 ..............................................................................................................7
3.1. 封装 .......................................................................................................................................7
3.2. 引脚定义 ................................................................................................................................8
4. 方框图...........................................................................................................9
5. 特殊功能寄存器 SFR ..................................................................................10
5.1. SFR 映射表.........................................................................................................................10
5.2. SFR 位分配.........................................................................................................................11
6. 8051 CPU 功能描述...................................................................................13
6.1. CPU 寄存器 ........................................................................................................................13
6.2. CPU 时序............................................................................................................................14
6.3. CPU 寻址方式.....................................................................................................................14
7. 存储器结构..................................................................................................15
7.1. 片上程序存储器 ...................................................................................................................16
7.2. 片上数据存储器 RAM .........................................................................................................16
7.3. 关于 C51 编译器的声明识别符 ............................................................................................18
8. 双数据指针寄存器 (DPTR) .........................................................................19
9. I/O 结构......................................................................................................20
9.1. IO 配置................................................................................................................................20
9.1.1. 准双向口........................................................................................................................20
9.1.2. 推挽输出........................................................................................................................20
9.1.3. 仅输入(高阻输入) ..........................................................................................................21
9.1.4. 开漏集输出 ....................................................................................................................21
9.2. I/O 端口寄存器....................................................................................................................22
9.2.1. 端口 1 ...........................................................................................................................23
9.2.2. 端口 2 ...........................................................................................................................23
9.2.3. 端口 3 ...........................................................................................................................23
10. 中断 ............................................................................................................25
10.1.中断结构 ..............................................................................................................................25
10.2.中断寄存器 ..........................................................................................................................26
11. 定时器/计数器 .............................................................................................29
11.1.定时器 0 和定时器 1............................................................................................................29
11.1.1. 模式 0 ...........................................................................................................................29
11.1.2. 模式 1............................................................................................................................30
11.1.3. 模式 2............................................................................................................................30
11.1.4. 模式 3............................................................................................................................31
11.1.5. 定时器 0/1 寄存器..........................................................................................................32
12. 串行口 (UART)...........................................................................................34
12.1.帧错误检测 ..........................................................................................................................34
12.2. 多处理器通讯 .......................................................................................................................35
12.3. 自动地址识别 .......................................................................................................................35
This document information is the intellectual property of Megawin Technology.
© Megawin Technology Co., Ltd. 2009 All rights reserved.
QP-7300-03D
2/75


Part Number MA803AS
Description single-chip microprocessor
Maker Megawin
PDF Download

MA803AS Datasheet PDF






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