參數(shù)資料
型號(hào): MC68HC05F4CDW
廠商: FREESCALE SEMICONDUCTOR INC
元件分類(lèi): 微控制器/微處理器
英文描述: 8-BIT, MROM, 1.789 MHz, MICROCONTROLLER, PDSO28
封裝: SOIC-28
文件頁(yè)數(shù): 85/130頁(yè)
文件大?。?/td> 10504K
代理商: MC68HC05F4CDW
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6-8
MC68HC05F4
16-BIT PROGRAMMABLE TIMER
6
When using the timer overow function and reading the free-running counter at random times to
measure an elapsed time, a problem may occur whereby the timer overow ag 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 ag.
Reading the alternate counter register instead of the counter register will avoid this potential
problem.
TCAP1 — Timer capture 1 ag
This bit reects the current state of the timer capture 1 input.
TCAP2 — Timer capture 2 ag
This bit reects the current state of the timer capture 2 input.
OC2F — Output compare 2 ag
This bit is set when the output compare register 2 contents match those of the free-running
counter; an output compare interrupt will be generated if OC2IE is set. OC2F is cleared by reading
the TSR and then the output compare 2 low register ($0027).
1 (set)
A valid output compare has occurred.
0 (clear) –
No output compare has occurred.
TPG
54
05F4Book Page 8 Tuesday, August 5, 1997 1:10 pm
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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