參數(shù)資料
型號: MC68HLC705KJ1CP
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP16
封裝: PLASTIC, DIP-16
文件頁數(shù): 45/117頁
文件大?。?/td> 1644K
代理商: MC68HLC705KJ1CP
Computer Operating Properly Module (COP)
Low-Power Modes
MC68HC705KJ1MC68HRC705KJ1MC68HLC705KJ1 — Rev. 4.0
Data Sheet
MOTOROLA
Computer Operating Properly Module (COP)
33
3.6 Low-Power Modes
The STOP and WAIT instructions have the following effects on the COP watchdog.
3.6.1 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.
3.6.2 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.
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