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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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7733 데이터시트(PDF) 126 Page - Renesas Technology Corp |
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7733 데이터시트(HTML) 126 Page - Renesas Technology Corp |
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126 / 940 page  TIMER A 7733 Group User’s Manual 6–15 6.3.4 Selectable functions The gate and pulse output functions are described below. (1) Gate function The gate function is selected by setting the gate function selection bits (bits 4 and 3 at addresses 5616 to 5A16) to “102” or “112.” When the gate function is selected, counting can be started or stopped by pin TAiIN’s input signal. Table 6.3.3 lists the count valid levels. Figure 6.3.5 shows an operation example when the gate function is selected. When selecting the gate function, set the port P5 and port P6 direction registers’ bits which correspond to pin TAiIN for the input mode. Also make sure that pin TAiIN’s input signal has a pulse width equal to or greater than two cycles of the count source. Table 6.3.3 Count valid levels 6.3 Timer mode Count valid level (Duration of counting) While pin TAiIN’s input signal level is “L” While pin TAiIN’s input signal level is “H” Note: The counter does not count while pin TAiIN’s input signal is not at the count valid level. b4 1 1 b3 0 1 Gate function selection bits |
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