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7906 Datasheet(PDF) 162 Page - Renesas Technology Corp |
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7906 Datasheet(HTML) 162 Page - Renesas Technology Corp |
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162 / 531 page  7906 Group User’s Manual Rev.2.0 8-11 TIMER B 8.3 Timer mode 8.3.2 Operation in timer mode ➀ When the count start bit is set to “1,” the counter starts counting of the count source. ➁ When a counter underflow occurs, the reload register’s contents are reloaded and counting continues. ➂ The timer Bi interrupt request bit is set to “1” at the counter underflow in ➁. The interrupt request bit remains set to “1” until the interrupt request is accepted or until the interrupt request bit is cleared to “0” by software. Figure 8.3.3 shows an example of operation in the timer mode. Fig. 8.3.3 Example of operation in timer mode Stops counting. Restarts counting. FFFF16 n 000016 Time Count start bit Timer Bi interrupt request bit Cleared to “0” when interrupt request is accepted or cleared by software. Set to “1” by software. Starts counting. Set to “1” by software. 1 / fi ✕ (n+1) fi : Frequency of count source Cleared to “0” by software. n : Reload register’s contents |
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