参数资料
型号: MC68HC05P9AMDW
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 149/158页
文件大小: 3885K
代理商: MC68HC05P9AMDW
Timer
90
Timer
Figure 44. Input Capture Operation
Output Compare
The output compare function is a means of generating an output signal
when the 16-bit counter reaches a selected value. Software writes the
selected value into the output compare registers. On every fourth
internal clock cycle the output compare circuitry compares the value of
the counter to the value written in the output compare registers. When a
match occurs, the timer transfers the programmable output level bit
(OLVL) from the timer control register to the TCMP pin.
Software can use the output compare register to measure time periods,
to generate timing delays, or to generate a pulse of specific duration or
a pulse train of specific frequency and duty cycle on the TCMP pin.
Figure 45 shows the logic of the output compare function.
Figure 45. Output Compare Operation
TCAP
EDGE
SELECT/
DETECT
LOGIC
TRH
TRL
ICRH
ICRL
ICIE
IEDG
ICF
TIMER
INTERRUPT
REQUEST
16-BIT COMPARATOR
OCRH ($0016)
OCRL ($0017)
16-BIT COUNTER
TCMP
PIN
CONTROL
LOGIC
OCIE
OLVL
OCF
TIMER
INTERRUPT
REQUEST
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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