參數(shù)資料
型號： MC68HC705J1Ac
廠商： 飛思卡爾半導體(中國)有限公司
英文描述： Microcontrollers
中文描述： 微控制器
文件頁數(shù)： 100/162頁
文件大?。?/td> 1085K
代理商： MC68HC705J1AC
Technical Data
MC68HC705J1A — Rev. 4.0
Computer Operating Properly (COP) Module
For More Information On This Product,
Go to: www.freescale.com
Computer Operating Properly (COP) Module
7.6 Low-Power Modes
The STOP and WAIT instructions have these effects on the COP
watchdog.
7.6.1 Stop Mode
The STOP instruction clears the COP watchdog counter and disables
the clock to the COP watchdog.
NOTE:
To prevent the STOP instruction from disabling the COP watchdog,
program the stop-to-wait conversion bit (SWAIT) in the mask option
register to logic 1.
Upon exit from stop mode by external reset:
The counter begins counting from $0000.
The counter is cleared again after the oscillator stabilization delay
and begins counting from $0000 again.
Upon exit from stop mode by external interrupt:
The counter begins counting from $0000.
The counter is not
cleared again after the oscillator stabilization
delay and continues counting throughout the oscillator
stabilization delay.
NOTE:
Immediately after exiting stop mode by external interrupt, service the
COP to ensure a full COP timeout period.
7.6.2 Wait Mode
The WAIT instruction has no effect on the COP watchdog.
NOTE:
To prevent a COP timeout during wait mode, exit wait mode periodically
to service the COP.
F
Freescale Semiconductor, Inc.
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.
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