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SM8958B

8位微控制器

32KB闪存

& 1KB RAM的嵌入式

产品List.................................................................................................................................................................................... 3

Description..................................................................................................................................................................................... 3

订购Information.....................................................................................................................................................................3

Features......................................................................................................................................................................................... 3

针Configuration...........................................................................................................................................................................4

块Diagram............................................................................................................................................................................... 7

特殊功能寄存器(SFR)................................................................................................................................................9

功能Description...................................................................................................................................................................12

1.

一般Features......................................................................................................................................................... 12

1.1

嵌入式Flash.................................................................................................................................................12

1.2

IO Pads.................................................................................................................................................................12

1.3

系统控制寄存器(SCONF)..................................................................................................................12

2.

指令Set............................................................................................................................................................... 13

3.

内存Structure.........................................................................................................................................................17

3.1

节目Memory................................................................................................................................................ 17

3.2

数据Memory....................................................................................................................................................... 18

3.3

数据存储器 - 低128字节（ 00h至7Fh)...................................................................................................18

3.4

数据存储器 - 高128字节（ 80h到FFh).................................................................................................18

3.5

数据存储器 - 扩展的768字节（$ 0000〜 $ 02FF ） ................................ ......................................... 18

4.

中央处理器Engine...................................................................................................................................................................22

4.1

Accumulator.........................................................................................................................................................22

4.2

B Register............................................................................................................................................................ 22

4.3

程序状态Word.........................................................................................................................................23

4.4

堆Pointer....................................................................................................................................................... 23

4.5

数据Pointer.........................................................................................................................................................23

5.

GPIO...............................................................................................................................................................................24

6.

定时器0和定时器1..................................................................................................................................................... 25

6.1

定时器/计数器模式控制寄存器(TMOD)................................................................................................ 25

6.2

定时器/计数器控制寄存器(TCON)............................................................................................................26

6.3

模式0 （13位Counter/Timer)......................................................................................................................... 26

6.4

模式1（ 16位Counter/Timer)......................................................................................................................... 27

6.5

模式2 （ 8位自动重装Counter/Timer)...................................................................................................... 27

6.6

模式3 （定时器0作为两个独立的8位定时器/计数器） ................................... ........................ 27

7.

定时器2........................................................................................................................................................................... 29

7.1

捕获mode......................................................................................................................................................30

7.2

自动加载（向上或向下Counter).................................................................................................................. 31

7.3

可编程时钟out....................................................................................................................................32

8.

串行接口

–

UART...............................................................................................................................................34

8.1

串行interface.................................................................................................................................................... 34

8.1.1

模式0........................................................................................................................................................ 35

8.1.2

模式1........................................................................................................................................................ 35

8.1.3

模式2........................................................................................................................................................ 36

8.1.4

模式3........................................................................................................................................................ 36

8.2

串行接口.............................................多处理器通信........................................... 36

8.3

波特率Generator......................................................................................................................................... 37

8.3.1

串行接口模式0............................................................................................................................ 37

8.3.2

串行接口模式2............................................................................................................................ 37

8.3.3

串行接口模式1和3................................................................................................................. 37

9.

Interrupt..........................................................................................................................................................................38

10.

看门狗Timer..........................................................................................................................................................40

11.

电源管理Unit.............................................................................................................................................42

11.1

空闲mode............................................................................................................................................................. 42

11.2

掉电mode............................................................................................................................................. 42

12.

脉冲宽度调制(PWM)................................................................................................................................. 44

13.

两线接口系列(TWSI).............................................................................................................................46

操作Conditions................................................................................................................................................................. 49

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-M085

版本一SM8958B 2014年3月7日

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