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Número de pieza | MA804 | |
Descripción | single-chip microprocessor | |
Fabricantes | Megawin | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de MA804 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
No Preview Available ! 8051 内核-单片机
MA803/MA804
说明书
北京菱电科技有限公司
TEL:010-82674978
版本: A10
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.
2013/07 version A10
1 page 目录
特性 .................................................................................................................... 3
目录 .................................................................................................................... 5
1. 概述 ............................................................................................................... 9
2. 方框图.......................................................................................................... 10
3. 特殊功能寄存器............................................................................................ 11
3.1. SFR 地址表...................................................................................................................11
3.2. SFR 位分配表...............................................................................................................12
4. 引脚结构 ...................................................................................................... 14
4.1. 封装指南.......................................................................................................................14
4.2. 引脚描述.......................................................................................................................16
5. 8051 CPU 功能描述..................................................................................... 18
5.1. CPU 寄存器 ..................................................................................................................18
5.2. CPU 时序......................................................................................................................19
5.3. CPU 寻址模式 ..............................................................................................................20
6. 存储器组织................................................................................................... 21
6.1. 片上程序存储器 ............................................................................................................21
6.2. 片上数据存储器 ............................................................................................................22
6.3. 片上扩展 RAM(XRAM)..................................................................................................24
6.4. 关于 C51 编译器的声明标识符 ......................................................................................25
7. 数据指针寄存器(DPTR)................................................................................ 26
8. 系统时钟 ...................................................................................................... 27
8.1. 时钟结构.......................................................................................................................27
8.2. 时钟寄存器 ...................................................................................................................28
8.3. 时钟示例代码................................................................................................................29
9. 看门狗定时器 (WDT).................................................................................... 30
9.1. WDT 结构.....................................................................................................................30
9.2. WDT 在掉电模式和空闲模式期间..................................................................................30
9.3. WDT 寄存器 .................................................................................................................31
9.4. WDT 硬件选项..............................................................................................................32
9.5. WDT 示例代码 ..............................................................................................................33
10.系统复位 ...................................................................................................... 34
10.1. 复位源 ..........................................................................................................................34
10.2. 上电复位.......................................................................................................................34
10.3. 外部复位.......................................................................................................................35
10.4. 软件复位.......................................................................................................................35
10.5. 低电压复位 ...................................................................................................................35
10.6. WDT 复位.....................................................................................................................36
10.7. 非法地址复位................................................................................................................36
10.8. 复位示例代码................................................................................................................37
11.电源管理 ...................................................................................................... 38
11.1. 低电压检测器................................................................................................................38
11.2. 省电模式.......................................................................................................................39
11.3. 空闲模式.......................................................................................................................39
MEGAWIN
MA803_MA804 说明书
5
5 Page 3. 特殊功能寄存器
3.1. SFR 地址表
表 3–1. SFR 地址表
0/8 1/9
F8 --
CH
F0 B
--
E8 --
CL
E0 ACC
WDTCR
D8 CCON
CMOD
D0 PSW
--
C8 --
--
C0 --
--
B8 IP
SADEN
B0 P3
P3M0
A8 IE
SADDR
A0 P2
--
98 SCON
SBUF
90 P1
P1M0
88 TCON
TMOD
80 P0
SP
0/8 1/9
2/A
CCAP0H
PCAPWM0
CCAP0L
IFD
CCAPM0
--
--
--
--
P3M1
--
--
--
P1M1
TL0
DPL
2/A
3/B
CCAP1H
PCAPWM1
CCAP1L
IFADRH
CCAPM1
--
--
--
--
--
--
--
--
P0M0
TL1
DPH
3/B
4/C
CCAP2H
PCAPWM2
CCAP2L
IFADRL
CCAPM2
--
--
--
--
--
--
--
P0M1
TH0
SPISDAT
4/C
5/D
CCAP3H
PCAPWM3
CCAP3L
IFMT
CCAPM3
--
--
ADCTL
--
--
--
--
--
P2M0
TH1
SPICTL
5/D
6/E
--
--
--
SCMD
--
--
--
ADCV
ADCVL
--
--
--
--
P2M1
AUXR
SPIDAT
6/E
7/F
--
--
--
ISPCR
--
--
--
PCON2
--
IPH
--
--
--
--
--
PCON
7/F
MEGAWIN
MA803_MA804 说明书
11
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