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參數(shù)資料
| 型號： | MC68HC05E6MFB |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | PLASTIC, QFP-44 |
| 文件頁數(shù)： | 94/140頁 |
| 文件大小： | 1584K |
| 代理商： | MC68HC05E6MFB |
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Programmable Timer
Timer functions
MC68HC05E6 — Rev. 1.0
Programmable Timer
7-ptimer
OCF — Output compare flag
1 = A valid output compare has occurred.
0 = No output compare has occurred.
This bit is set when the output compare register contents match those
of the free-running counter; an output compare interrupt will be
generated if OCIE is set. OCF is cleared by reading the TSR and then
the output compare low register at $17.
TOF — Timer overflow flag
1 = Timer overflow has occurred.
0 = No timer overflow has occurred.
This bit is set when the free-running counter overflows from $FFFF to
$0000; a timer overflow interrupt will occur if TOIE is set. TOF is
cleared by reading the TSR and the counter low register at $19.
When using the timer overflow function and reading the free-running
counter at random times to measure an elapsed time, a problem may
occur whereby the timer overflow flag is unintentionally cleared if:
1. the timer status register is read or written when TOF is set and
2. the LSB of the free-running counter is read, but not for the purpose
of servicing the flag.
Reading the alternate counter register instead of the counter register
will avoid this potential problem.
Input capture
function
‘Input capture’ is a technique whereby an external signal (connected to
the TCAP pin) is used to trigger a read of the free-running counter. In this
way it is possible to relate the timing of an external signal to the internal
counter value, and hence to elapsed time.
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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)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| MC68HC05E6VDW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
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| MC68HC05F32 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:a member of the M68HC05 family of HCMOS |
| MC68HC05F32CFU | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:a member of the M68HC05 family of HCMOS |
| MC68HC05F32CPU | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:a member of the M68HC05 family of HCMOS |
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