MA805-32 datasheet, PDF - EEWORLD Datasheet

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MA805-32: Description80c51 cpu; CategoryDevelopment board/suite/development tools; File Size2MB，173 Pages; ManufacturerMegawin; Websitehttp://www.megawin.com.tw/en-global

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MA805-32 Overview

80c51 cpu

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8051

内核-单片机

MA805-32/MA806-32

说明书

版本:

A1.01

This document contains information on a new product under development by Megawin. Megawin reserves the right to change or

discontinue this product without notice.



2015/09 version A1.01

目½

功½

................................................................................................................... 3

目½

................................................................................................................... 5

1. 概述

............................................................................................................ 9

2. 方框图

....................................................................................................... 11

3. 特殊功½寄存器（SFRs）

.......................................................................... 12

3.1. SFR 映射图

.......................................................................................................... 12

3.2. SFR ½分配

.......................................................................................................... 13

4. 引脚

.......................................................................................................... 16

4.1. 引脚结构

.............................................................................................................. 16

4.2. 引脚定义

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

4.3. 引脚功½重映像

................................................................................................... 21

5. 8051 CPU 功½描述

................................................................................... 22

5.1. CPU 寄存器

.......................................................................................................... 22

5.2. CPU 时序

.............................................................................................................. 23

5.3. CPU 寻址方式

...................................................................................................... 23

6. 存储器

....................................................................................................... 25

6.1.

6.2.

6.3.

6.4.

片上程序存储器

................................................................................................... 25

片上数据存储器

................................................................................................... 26

片上扩展 RAM (XRAM)

........................................................................................... 30

外部数据存储器的存取

........................................................................................ 31

6.4.1. 8 ½ MOVX 复用模式

.....................................................................................................32

6.4.2. 16 ½ MOVX 复用模式

....................................................................................................33

6.4.3. MOVX 无地址状态模式

...................................................................................................34

6.5. 关于 C51 编译器的声明标识符

............................................................................. 35

7. 双数据指针寄存器 (DPTR)

......................................................................... 36

8. I/O 口

........................................................................................................ 36

8.1. I/O 口结构

........................................................................................................... 37

8.1.1. 准双向口

.....................................................................................................................37

8.1.2. 推½输出

.....................................................................................................................37

8.1.3. 仅输入模式 (高阻抗输入)

...........................................................................................38

8.1.4. 开漏输出

.....................................................................................................................38

8.2. I/O 口寄存器

...................................................................................................... 39

8.2.1. 端口 0 寄存器

..............................................................................................................40

8.2.2. 端口 1 寄存器

..............................................................................................................40

8.2.3. 端口 2 寄存器

..............................................................................................................41

8.2.4. 端口 3 寄存器

..............................................................................................................41

8.2.5. 端口 4 寄存器

..............................................................................................................42

8.2.6. 端口 5 寄存器

..............................................................................................................42

8.2.7. 端口 6 寄存器

..............................................................................................................43

8.3.

GPIO

示例代码

................................................................................................... 44

9. 中断

.......................................................................................................... 46

MEGAWIN

MA805-32_MA806-32

说明书

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