参数资料
型号: M38004E8-XXXFP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP64
封装: 14 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-64
文件页数: 133/174页
文件大小: 1752K
代理商: M38004E8-XXXFP
APPLICATION
2.2 Timer
2-12
3800 GROUP USER’S MANUAL
(2) Timer application example 1 : Clock function (measurement of 250 ms)
Outline : The input clock is divided by a timer so that the clock counts up every 250 ms.
Specifications : The clock f(XIN) = 4.19 MHz (222 Hz) is divided by a timer.
The clock is counted at intervals of 250 ms by the Timer X interrupt.
Figure 2.2.10 shows a connection of timers and a setting of division ratios, Figures 2.2.11 show a
setting of related registers, and Figure 2.2.12 shows a control procedure.
Fig. 2.2.10 Connection of timers and setting of division ratios [Clock function]
Timer X interrupt request bit
1/16
0 or 1
1/256
f(XIN) =
4.19 MHz
Fixed
Prescaler X
Timer X
250 ms
0 : No interrupt request
1 : Interrupt request
1/4
The clock is divided by 4 by software.
1 second
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