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7534 Datasheet(PDF) 86 Page - Renesas Technology Corp |
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7534 Datasheet(HTML) 86 Page - Renesas Technology Corp |
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86 / 221 page  7534 Group APPLICATION 2.2 Timer Rev.3.00 Oct 23, 2006 page 17 of 78 REJ09B0178-0300 (2) Timer application example 1: Clock function (measurement of 100 ms) Outline: The input clock is divided by the timer so that the clock can count up at 100 ms intervals. Specifications: •The clock f(XIN) = 6.00 MHz is divided by the timer. •The clock is counted up in the process routine of the timer X interrupt which occurs at 100 ms intervals. Figure 2.2.11 shows the timers connection and setting of division ratios; Figure 2.2.12 shows the relevant registers setting; Figure 2.2.13 shows the control procedure. Fig. 2.2.11 Timers connection and setting of division ratios f(XIN) = 6.00 MHz 100 ms 1/16 1/147 1/256 1/10 1 second Dividing by 4 with software Timer X count source selection bit Prescaler X Timer X Timer X interrupt request bit 0 or 1 0 : No interrupt request issued 1 : Interrupt request issued |
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