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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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7721 датащи(PDF) 138 Page - Renesas Technology Corp |
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7721 датащи(HTML) 138 Page - Renesas Technology Corp |
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138 / 577 page  TIMER A 7721 Group User’s Manual 8–19 8.4 Event counter mode Table 8.4.2 Specifications of event counter mode (when using two-phase pulse signal processing function) Item Count source Count operation Division ratio Count start condition Count stop condition Interrupt request occurrence timing TAjIN, TAjOUT pin function Read from timer Aj register Write to timer Aj register 1 (n + 1) Specifications External signal (two-phase pulse) input to the TAjIN or TAjOUT pin q Countup or countdown can be switched by external signal (two- phase pulse). q When a counter overflow or underflow occurs, reload register’s contents are reloaded, and counting continues. q For countdown q For countup When the count start bit is set to “1.” When the count start bit is cleared to “0.” When a counter overflow or underflow occurs. Two-phase pulse input Counter value can be read out. q While counting is stopped When a value is written to the timer Aj 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 Aj register, it is written only to the reload register. (Transferred to the counter at the next reload time.) 1 (FFFF16 – n + 1) n : Timer Aj register’s set value |
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