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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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7733 датащи(PDF) 142 Page - Renesas Technology Corp |
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7733 датащи(HTML) 142 Page - Renesas Technology Corp |
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142 / 940 page  TIMER A 7733 Group User’s Manual 6–31 [Precautions in event counter mode] 1. While counting is in progress, by reading out the timer Ai register, the counter value can be read at an arbitrary timing. However, when reading is performed at the reload timing shown in Figure 6.4.11, value “FFFF16” is read out at an underflow and value “000016” is read out at an overflow. If reading is performed in the period from when a value is set into the timer Ai register with the counter stopped until the counter starts counting, the set value is correctly read out. 6.4 Event counter mode Fig. 6.4.11 Timer Ai register read out 2. Pin TAiOUT is used for all functions listed below. Therefore, only one of the following functions can be used for one timer. q Switching between countup and countdown by pin TAiOUT’s input signal q Pulse output function q Two-phase pulse signal processing function (Timers A2 to A4) 21 0 n n – 1 Counter value (Hex.) 21 0 FFFF n – 1 Read value (Hex.) Reload Time n = Reload register’s contents (1) While counting down FFFD FFFE FFFF n n + 1 FFFD FFFE FFFF 0000 n + 1 (2) While counting up Counter value (Hex.) Read value (Hex.) Reload Time n = Reload register’s contents |
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