参数资料
型号: MC68HC705C9ACB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP42
封装: PLASTIC, SHRINK, DIP-42
文件页数: 72/118页
文件大小: 750K
代理商: MC68HC705C9ACB
Timer During Wait Mode
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
57
To prevent OCF from being set between the time it is read and the time the output compare registers are
updated, use this procedure:
1.
Disable interrupts by setting the I bit in the condition code register.
2.
Write to OCRH. Compares are now inhibited until OCRL is written.
3.
Clear bit OCF by reading timer status register (TSR).
4.
Enable the output compare function by writing to OCRL.
5.
Enable interrupts by clearing the I bit in the condition code register.
8.4 Timer During Wait Mode
The CPU clock halts during the wait mode, but the timer remains active. If interrupts are enabled, a timer
interrupt will cause the processor to exit the wait mode.
8.5 Timer During Stop Mode
In the stop mode, the timer stops counting and holds the last count value if STOP is exited by an interrupt.
If STOP is exited by reset, the counters are forced to $FFFC. During STOP, if at least one valid input
capture edge occurs at the TCAP pins, the input capture detect circuit is armed. This does not set any
timer flags or wake up the MCU, but if an interrupt is used to exit stop mode, there is an active input
capture flag and data from the first valid edge that occurred during the stop mode. If reset is used to exit
stop mode, then no input capture flag or data remains, even if a valid input capture edge occurred.
相关PDF资料
PDF描述
MC68HC705C9ACFNE 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC44
MC68HC705C9AFB 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP44
MC68HC705C9AVFN 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC44
MC68HC705C9AP 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP40
MC68HC705C9AFB 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP44
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