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PDF MA807 Data sheet ( Hoja de datos )
| Número de pieza | MA807 | |
| Descripción | 8051 core - Microcontroller | |
| Fabricantes | Megawin | |
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8051 内核-单片机
MA807
说明书
版本: A1.0
北京菱电科技有限公司
Tel:010-82674978
This document contains information on a new product under development by Megawin. Megawin reserves the right to change or
discontinue this product without notice.
Megawin Technology Co., Ltd. 2005 All rights reserved.
2014/02 version A1.0
1 page  
目录
功能....................................................................................................................3
目录....................................................................................................................5
1. 概述.............................................................................................................9
2. 方框图 .......................................................................................................10
3. 特殊功能寄存器 SFR .................................................................................11
3.1. SFR 映射表...................................................................................................................... 11
3.2. SFR 位分配...................................................................................................................... 12
3.3. SFR 内存分页 .................................................................................................................. 13
4. 引脚...........................................................................................................14
4.1. 封装 .................................................................................................................................. 14
4.2. 引脚定义........................................................................................................................... 15
5. 系统时钟....................................................................................................16
5.1. 时钟结构图 ....................................................................................................................... 16
5.2. 时钟寄存器 ....................................................................................................................... 16
5.3. 时钟示例代码.................................................................................................................... 18
6. 8051 CPU 功能描述..................................................................................19
6.1. CPU 寄存器 ..................................................................................................................... 19
6.2. CPU 时序......................................................................................................................... 19
6.3. CPU 寻址方式.................................................................................................................. 20
7. 存储器结构 ................................................................................................21
7.1. 片上程序存储器 ................................................................................................................ 21
7.2. 片上数据存储器 RAM....................................................................................................... 22
7.3. 片上扩展 RAM (XRAM)..................................................................................................... 22
7.4. 关于 C51 编译器的声明识别符 .......................................................................................... 23
8. 双数据指针寄存器 (DPTR)........................................................................24
9. I/O 结构 ....................................................................................................25
9.1. IO 配置 ............................................................................................................................ 25
9.1.1. 准双向口..................................................................................................................... 25
9.1.2. 推挽输出..................................................................................................................... 25
9.1.3. 仅输入(高阻输入)........................................................................................................ 26
9.1.4. 开漏集输出 ................................................................................................................. 26
9.2. I/O 端口寄存器 ................................................................................................................. 27
9.2.1. 端口 0......................................................................................................................... 28
9.2.2. 端口 1........................................................................................................................ 28
9.2.3. 端口 2........................................................................................................................ 28
9.2.4. 端口 3........................................................................................................................ 29
9.2.5. 端口 4........................................................................................................................ 29
9.2.6. 端口 6........................................................................................................................ 30
9.3. GPIO 示例代码 ................................................................................................................ 31
10. 中断...........................................................................................................33
10.1.中断结构........................................................................................................................... 33
10.2.中断寄存器 ....................................................................................................................... 34
10.3.中断示例代码.................................................................................................................... 39
11. 定时器/计数器............................................................................................40
11.1.定时器 0 和定时器 1......................................................................................................... 40
MEGAWIN
MA807 说明书
5
5 Page 
3. 特殊功能寄存器 SFR
3.1. SFR 映射表
SFR
页
0/8
1/9
2/A
3/B
4/C
5/D
6/E
7/F
F8
0
F
---
-- CCAP0H --
--
--
--
--
F0
0
F
B
--
--
--
--
--
--
--
E8
0
F
P4
-- CCAP0L
--
--
--
--
--
E0
0
F
ACC
WDTCR
IFD
IFADRH IFADRL
IFMT
SCMD
ISPCR
D8
0
F
CCON
---
CMOD
--
--
--
--
--
--
D0
0
F
PSW
--
--
--
--
-- GPWKPE P1WKPE
C8
0
F
C0
0
F
T2CON
P6
XIFLG
T2MOD RCAP2L RCAP2H
XICON0 XICON1
--
TL2
--
TH2
--
-- --
-- CKCON0
B8
0
F
IP0L
SADEN
--
--
--
--
-- CKCON1
B0
0
F
P3
P3M0
P3M1
P4M0
P4M1
P5M0
P5M1
IP0H
A8
0
F
IE SADDR
--
--
SFRPI
EIE1
EIP1L
EIP1H
A0
0
F
P2
-- AUXR1 AUXR2
--
--
--
--
98
0
F
SCON
SBUF
--
--
--
-- ACCON ACMOD
90
0
F
P1
P1M0
P1M1
P0M0
P0M1
P2M0
P2M1
PCON1
88
0
F
TCON
TMOD
TL0
TL1
TH0
TH1 AUXR0 STRETCH
80
0
F
P0
SP DPL DPH
--
--
-- PCON0
0/8 1/9 2/A 3/B 4/C 5/D 6/E 7/F
*: SFR 页需要正确设置相对应的 SFRPI=0x00, SFRPI=0x01 切换，才能正确 SFR 寄存器，
（进入中断，SFRPI 需要保存当下值，并且设置中断使用的 SFR 页，并且中断返回前回存，MCU 不会自动切换）
MEGAWIN
MA807 说明书
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MA807.PDF ] | |
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