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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UPD17062 датащи(PDF) 142 Page - Renesas Technology Corp |
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UPD17062 датащи(HTML) 142 Page - Renesas Technology Corp |
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142 / 298 page  140 µPD17062 As shown in Fig. 12-5, if the timer carry FF setting time interval is switched, the timer error that occurs before the BTM0CY flag is set for the first time is as follows: -tSET < error < tCHECK where tSET : Newly selected timer carry FF setting time interval tCHECK : Time interval at which the BTM0CY flag is checked The internal pulses, 4 Hz, 10 Hz, 200 Hz, and 1 kHz, have a phase difference. However, this phase difference is less than a newly selected set pulse interval, and included in the timer error described above. See Section 12.6 for details about the phase difference of each pulse. Fig. 12-5 Timer Error That Occurs When the Timer Carry FF Setting Time Interval Is Switched from A to B (a) Timer error of -tSET (b) Timer error of tCHECK tSET tSET = 0 SKT1 BTM0CY Internal pulse A Internal pulse B Timer carry FF set pulse BTM0CY flag True timer interval Actual timer interval Time interval switched here If the BTM0CY flag is checked right after the timer setting time interval is switched, it appears to be 1, and therefore, the timer error is -tSET. Actual timer interval True timer interval Time interval switched here If the timer setting time interval is switched right after the BTM0CY flag is checked, the BTM0CY flag remains reset for one cycle, and therefore, the timer error is tCHECK. . . = 0 . . tCHECK |
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