参数资料
型号: S3P9664-SM
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO24
封装: 0.300 INCH, SOP-24
文件页数: 145/148页
文件大小: 784K
代理商: S3P9664-SM
BASIC TIMER and TIMER 0
S3C9664/P9664 (Preliminary Spec)
10-12
Capture Mode
In capture mode, the timer 0 counter increases at a rate determined by the timer clock. The trigger signal
(a rising or falling edge) for the capture operation occurs at the T0 pin. The interrupt service routine stores the
captured 8-bit timer 0 counter value in the timer 0 data register whenever the capture signal is detected at the
T0 pin.
By reading the counter value at programmed intervals, the routine can compare the differences between
successive read values and calculate elapsed time interval. For example, if 80H is read and then 90H is read,
this gives a difference of 10H. Depending on the clock speed, you can convert this hexadecimal value into the
equivalent time interval (in this case, it is approximately 10 milliseconds).
PND
Interrupt
Enable/Disable
T0_INT
T0CON
P0.0/T0 (CAP)
Data Register
(T0DATA)
T0_OVF
Interrupt
Enable/Disable
Counter
(T0CNT)
CLK
PND
Figure 10-10. Simplified Timer 0 Function Diagram: Capture Mode
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