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STC89C53RC датащи(PDF) 31 Page - List of Unclassifed Manufacturers

номер детали STC89C53RC
подробное описание детали  STC12C5410AD
PDF  149 Pages
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производитель  ETC1 [List of Unclassifed Manufacturers]
домашняя страница  
Logo ETC1 - List of Unclassifed Manufacturers

STC89C53RC датащи(HTML) 31 Page - List of Unclassifed Manufacturers

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宏晶科技:www.MCU-Memory.com   Mobile:13922805190(姚永平)   Tel:0755-82948409    Fax: 0755-82944243
宏晶科技:专业单片机 / 存储器供应商   www.MCU-Memory.com   STC12C5410AD 系列 1T 8051 单片机中文指南
31
    设时钟为 11.0592MHz:
    看门狗溢出时间 = (12 x Pre-scale x 32768) / 11059200 = Pre-scale x 393216 / 11059200
PS2
PS1
PS0
Pre-scale
预分频
WDT Period @11.0592MHz
 0
 0
 0
    2
       71.1 mS
 0
 0
 1
    4
     142.2 mS
 0
 1
 0
    8
     284.4 mS
 0
 1
 1
    16
     568.8 mS
 1
 0
 0
    32
      1.1377S
 1
 0
 1
    64
      2.2755S
 1
 1
 0
    128
      4.5511S
 1
 1
 1
    256
      9.1022S
汇编语言程序示例
WDT_CONTR
DATA
0E1H ;    或者   WDT_CONTR EQU   0E1H
;复位入口
ORG
0000H
LJMP
Initial
ORG
0060H
Initial:
MOV
WDT_CONTR, #00111100B; Load initial value 看门狗定时器控制寄存器初始化
               ; EN_WDT = 1, CLR_WDT = 1, IDLE_WDT = 1, PS2 = 1, PS1 = 0, PS0 = 0
Main_Loop:
LCALL
Display_Loop
LCALL
Keyboard_Loop
MOV
WDT_CONTR, #00111100B ;  喂狗,  不要用 ORL    WDT_CONTR,  #00010000B
LJMP
Main_Loop
C 语言程序示例
#include<reg52.h>
sfr
WDT_CONTR
0xe1;
void main()
{   …
WDT_CONTR
0x3c;
   /* 0011,1100 EN_WDT = 1,CLR_WDT = 1,IDLE_WDT = 1,PS2 = 1,PS1 = 0,PS0 = 0 */
while(1){
display();
keyboard();
WDT_CONTR
0x3c;  /* 喂狗,  不要用  WDT_CONTR =
WDT_CONTR | 0x10;*/
}
}



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