參數(shù)資料
型號： MC68HC705JB2DW
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDSO20
封裝： SOIC-20
文件頁數(shù)： 94/128頁
文件大?。?/td> 2493K
代理商： MC68HC705JB2DW
GENERAL RELEASE SPECIFICATION
August 28, 1998
PROGRAMMABLE TIMER
MC68HC705JB2
9-10
REV 1.1
OCF - OUTPUT COMPARE FLAG
The OCF bit is automatically set when the value of the timer registers matches
the contents of the output compare registers. Clear the OCF bit by reading the
timer status register with the OCF set, and then accessing the low byte (OCRL,
$0017) of the output compare registers. Reset has no effect on OCF.
TOF - TIMER OVERFLOW FLAG
The TOF bit is automatically set when the 16-bit timer counter rolls over from
$FFFF to $0000. Clear the TOF bit by reading the timer status register with the
TOF set, and then accessing the low byte (TMRL, $0019) of the timer registers.
Reset has no effect on TOF.
9.7
TIMER OPERATION DURING WAIT MODE
During WAIT mode the 16-bit timer continues to operate normally and may
generate an interrupt to trigger the MCU out of the WAIT mode.
9.8
TIMER OPERATION DURING STOP MODE
When the MCU enters the STOP mode the free-running counter stops counting
(the internal processor clock is stopped). It remains at that particular count value
until the STOP mode is exited by applying a low signal to the IRQ pin, at which
time the counter resumes from its stopped value as if nothing had happened. If
STOP mode is exited via an external reset (logic low applied to the RESET pin)
the counter is forced to $FFFC.
If a valid input capture edge occurs at the PB0/TCAP pin during the STOP mode
the input capture detect circuitry will be armed. This action does not set any ags
or “wake up” the MCU, but when the MCU does “wake up” there will be an active
input capture ag (and data) from the rst valid edge. If the STOP mode is exited
by an external reset, no input capture ag or data will be present even if a valid
input capture edge was detected during the STOP mode.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關(guān)PDF資料
PDF描述
MC68HC705JB2P 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDIP20
MC68HC705JB4P 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDIP28
MC68HC705K1CDW 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDSO16
MC68HC705K1CP 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDIP16
MC68HC705K1S 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, CDIP16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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