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HT56R67 Datasheet(PDF) 93 Page - Holtek Semiconductor Inc

Part # HT56R67
Description  TinyPower A/D Type with LCD 8-Bit OTP MCU
Download  129 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT56R67 Datasheet(HTML) 93 Page - Holtek Semiconductor Inc

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HT56R67/HT56R668/HT56C668/HT56R678/HT56C678/HT56R688
Rev. 1.70
2014-04-04
93
·
正常操作时看门狗溢出复位
除了看门狗溢出标志位 TO 将被设为 1 之外,正常操作时看门狗溢出复位和 RES 复位相同。
正常操作时看门狗溢出复位时序图
·
暂停时看门狗溢出复位
暂停时看门狗溢出复位和其它种类的复位有些不同,除了程序计数器与堆栈指针将被清 0 及 TO
位被设为 1 外,绝大部分的条件保持不变。图中 t
SST 的详细说明请参考交流电气特性。
暂停时看门狗溢出复位时序图
·
复位初始状态
不同的复位形式以不同的途径影响复位标志位。这些标志位,即 PDF 和 TO 位存放在状态寄存
器中,由暂停功能或看门狗计数器等控操作控制。复位标志位如下所示:
TO
PDF
复位条件
0
0
上电时的 RES 复位
u
u
正常运行时的 RES 或 LVR 复位
1
u
正常运行时的 WDT 溢出复位
1
1
暂停时的 WDT 溢出复位
注:“u”代表不改变
在单片机上电复位之后,各功能单元初始化的情形,列于下表。
项 目
复位后情况
程序计数器
清除为零
中断
所有中断被禁止
看门狗定时器
WDT 清除并重新计数
定时/计数器
定时/计数器停止
预分频器
定时/计数器之预分频器内容清除
输入/输出口
所有 I/O 设为输入模式
堆栈指针
堆栈指针指向堆栈顶端


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