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7906 bảng dữ liệu(PDF) 159 Page - Renesas Technology Corp |
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7906 bảng dữ liệu(HTML) 159 Page - Renesas Technology Corp |
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159 / 531 page ![]() 7906 Group User’s Manual Rev.2.0 8-8 TIMER B 8.3 Timer mode In this mode, the timer counts an internally generated count source. Table 8.3.1 lists the specifications of the timer mode. Figure 8.3.1 shows the structures of the timer Bi register and timer Bi mode register in the timer mode. Table 8.3.1 Specifications of timer mode 8.3 Timer mode Item Count source fi Count operation Division ratio Count start condition Count stop condition Interrupt request occurrence timing TBiIN pin’s function Read from timer Bi register Write to timer Bi register Specifications f2, f16, f64, or f512 •Countdown •When a counter underflow occurs, reload register’s contents are re- loaded, and counting continues. When the count start bit is set to “1.” When the count start bit is cleared to “0.” When a counter underflow occurs. Programmable I/O port pin Counter value can be read out. q While counting is stopped When a value is written to the timer Bi register, it is written to both of the reload register and counter. q While counting is in progress When a value is written to the timer Bi register, it is written only to the reload register. (Transferred to the counter at the next reload timing.) 1 (n + 1) n: Timer Bi register’s set value |
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