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7733 датащи(PDF) 128 Page - Renesas Technology Corp |
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7733 датащи(HTML) 128 Page - Renesas Technology Corp |
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128 / 940 page ![]() TIMER A 7733 Group User’s Manual 6–17 (2) Pulse output function The pulse output function is selected by setting the pulse output function selection bit (bit 2 at addresses 5616 to 5A16) to “1.” When this function is selected, pin TAiOUT is forcibly set as the pulse output pin independent of the corresponding bits of the port P5 and port P6 direction registers. And then, pin TAiOUT outputs the signal of which polarity is inverted each time an underflow occurs. When the count start flag (address 4016) = “0,” in other words, when counting is stopped, pin TAiOUT outputs “L” level. Figure 6.3.6 shows an operation example when the pulse output function is selected. 6.3 Timer mode Fig. 6.3.6 Operation example when pulse output function is selected Counting is stopped. Counting is restarted. FFFF16 n 000016 Time Count start flag Pulse output from pin TAiOUT “1” n = Reload register’s contents Cleared to “0” when an interrupt request is accepted; otherwise, cleared by software Set to “1” by software Counting is started. “0” Timer Ai interrupt request bit “1” “0” Set to “1” by software “1” “0” Cleared to “0” by software |
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