SM39R4051/SM39R2051
8位微控制器
FOSVOS电话： 021-58998693
4KB / 2KB具有ISP功能的Flash
& 256B RAM的嵌入式
描述..........................................................................................................................................................................3
Features..............................................................................................................................................................................3
引脚配置................................................................................................................................................................4
块Diagram.....................................................................................................................................................................5
针Description....................................................................................................................................................................6
特殊功能寄存器（ SFR ） ........................................................................................................................................7
功能说明...........................................................................................................................................................9
1.
一般特点.......................................................................................................................................................9
1.1.
嵌入式闪存...........................................................................................................................................9
1.2.
IO垫.........................................................................................................................................................9
1.3.
指令时序的选择...........................................................................................................................9
1.4.
RESET ........................................................................................................................................................10
1.4.1.
硬件复位功能.............................................................................................................10
1.4.2.
软复位功能..............................................................................................................10
1.4.3.
时间访问密钥寄存器(TAKEY)................................................................................................10
1.4.4.
软件复位寄存器(SWRES).................................................................................................11
1.4.5.
软件复位的例子.............................................................................................................11
1.5.
钟.........................................................................................................................................................11
2.
指令集..........................................................................................................................................................12
3.
内存Structure.....................................................................................................................................................16
3.1.
程序存储器........................................................................................................................................16
3.2.
数据Memory...............................................................................................................................................17
3.2.1.
数据存储器 - 低128字节（从00h到7F ） ....................................... ........................................... 18
3.2.2.
数据存储器 - 高128字节（ 80H到FFH ） ....................................... ......................................... 18
4.
CPU引擎.............................................................................................................................................................19
4.1.
累加器................................................................................................................................................19
4.2.
B注册...................................................................................................................................................19
4.3.
程序状态Word..................................................................................................................................20
4.4.
堆栈指针...............................................................................................................................................20
4.5.
数据指针................................................................................................................................................20
4.6.
数据指针1 .............................................................................................................................................21
4.7.
接口控制寄存器.............................................................................................................................21
5.
GPIO ........................................................................................................................................................................22
6.
定时器0和1 .................................................................................................................................................24
6.1.
定时器/计数器模式控制寄存器（ TMOD ） ......................................... .................................................. ..24
6.2.
定时器/计数器控制寄存器（ TCON ） .......................................................................................................25
6.3.
T0，T1信号swapping：..........................................................................................................................25
7.
串行接口0 ......................................................................................................................................................26
7.1.
模式0 ........................................................................................................................................................27
7.2.
模式1 ........................................................................................................................................................27
7.3.
模式2 ........................................................................................................................................................28
7.4.
模式3 ........................................................................................................................................................28
7.5.
串行接口0的多机通信............................................ ....................................... 28
7.6.
波特率发生器....................................................................................................................................29
7.6.1.
串行接口0的模式1和3 ...................................................................................................29
7.6.2.
时钟源波特rate.............................................................................................................29
8.
看门狗定时器........................................................................................................................................................30
9.
中断....................................................................................................................................................................33
9.1.
优先级structure..................................................................................................................................35
10.
电源管理Unit.................................................................................................................................36
10.1.
空闲模式................................................................................................................................................36
10.2.
停止mode...............................................................................................................................................36
11.
IIC功能......................................................................................................................................................37
12.
LVI - 低电压中断.............................................................................................................................41
13.
在系统编程（ ISP内部） ...........................................................................................................42
13.1.
ISP服务程序...............................................................................................................................42
13.2.
锁定位（N ） .............................................................................................................................................42
规格如有变更，恕不另行通知联系您的销售代理商以获取最新信息。
ISSFD-M055
1
Ver.E SM39R4051 09/2011
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
