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7721 Datasheet(PDF) 155 Page - Renesas Technology Corp |
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7721 Datasheet(HTML) 155 Page - Renesas Technology Corp |
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155 / 577 page  TIMER A 7721 Group User’s Manual 8–36 8.5 One-shot pulse mode Stops counting. Starts counting. FFFF16 n 000116 Time Count start bit Timer Aj interrupt request bit n = Reload register’s contents Cleared to “0” when interrupt request is accepted or cleared by software. Set to “1” by software. Starts counting. TAjIN pin input signal One-shot pulse output from TAjOUT pin Trigger during counting 1 / fi ! (n) Note: The above applies when an external trigger (rising of TAjIN pin’s input signal) is selected. 1 / fi ! (n+1) When the count start bit = “0” (counting stopped), the TAjOUT pin outputs “L” level. When a trigger is generated during counting, the counter counts the count source (n + 1) times after a new trigger is generated. fi = Frequency of count source (f2, f16, f64, or f512) Stops counting. Reloaded Reloaded Fig. 8.5.5 Example of operation in one-shot pulse mode (selecting external trigger) |
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