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STC89C53RC датащи(PDF) 30 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]
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STC89C53RC датащи(HTML) 30 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
30
适用型号:  STC12C5410AD 系列
Symbol 符号 Function 功能
WDT_FLAG    When WDT overflows, this bit is set. It can be cleared by software.
          看门狗溢出标志位,当溢出时,该位由硬件置 1,可用软件将其清 0。
EN_WDT
Enable WDT bit. When set, WDT is started
看门狗允许位,  当设置为“1”时,看门狗启动。
CLR_WDT
WDT clear bit. When set, WDT will recount. Hardware will automatically clear
            this bit.
看门狗清“0”位,当设为“1”时,看门狗将重新计数。硬件将自动清“0”此位。
IDLE_WDT
When set, WDT is enabled in IDLE mode. When clear, WDT is disabled in IDLE mode
看门狗“IDLE”模式位,当设置为“1”时,看门狗定时器在“空闲模式”计数
                               当清“0”该位时,  看门狗定时器在“空闲模式”时不计数
PS2, PS1, PS0 Pre-scale value of Watchdog timer is shown as the bellowed table:
            看门狗定时器预分频值,如下表所示
Mnemonic
Add
Name
 7
 6
 5
 4
 3
 2
 1
 0
Reset Value
WDT_CONTR E1h
Watch-Dog-Timer
Control register
 WDT_FLAG
 -
EN_WDT CLR_WDT IDLE_WDT PS2 PS1 PS0 xx00,0000
PS2
PS1
PS0
Pre-scale
预分频
WDT Period @20MHz
 0
 0
 0
    2
       39.3 mS
 0
 0
 1
    4
       78.6 mS
 0
 1
 0
    8
     157.3 mS
 0
 1
 1
    16
     314.6 mS
 1
 0
 0
    32
     629.1 mS
 1
 0
 1
    64
        1.25S
 1
 1
 0
    128
        2.5S
 1
 1
 1
    256
        5S
PS2
PS1
PS0
Pre-scale
预分频
WDT Period @12MHz
 0
 0
 0
    2
       65.5 mS
 0
 0
 1
    4
     131.0 mS
 0
 1
 0
    8
     262.1 mS
 0
 1
 1
    16
     524.2 mS
 1
 0
 0
    32
      1.0485S
 1
 0
 1
    64
      2.0971S
 1
 1
 0
    128
      4.1943S
 1
 1
 1
    256
      8.3886S
               看门狗应用及测试程序
The WDT period is determined by the following equation 看门狗溢出时间计算
看门狗溢出时间 =( N x Pre-scale x 32768) / Oscillator frequency
设时钟为 12MHz :
看门狗溢出时间 =  ( 12 x Pre-scale x 32768) / 12000000 = Pre-scale x 393216 / 12000000



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