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7480 Datasheet(PDF) 92 Page - Renesas Technology Corp |
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7480 Datasheet(HTML) 92 Page - Renesas Technology Corp |
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92 / 337 page  1-75 1.12 Timer X and Timer Y HARDWARE 7480 Group and 7481 Group User's Manual Figure 1.12.14 Operation Example in Pulse Period Measurement Mode RL RL Count source 000016 FFFF16 Timer X stop control bit CNTR0 pin input ‘0’ is written Time T Count start Timer X interrupt request bit CNTR0 interrupt request bit RL RL RL RL UF UF A A 3 1 2 4 5 Note: In this case, CNTR0 edge selection bit is ‘0’ (falling edge is valid). A : Clearing by writing ‘0’ to interrupt request bit or accepting interrupt request RL UF T : ‘FFFF16’ is reloaded : Underflow : Pulse period T(s) = 1 Count source frequency × {(Contents of timer latch + 1) +65536 × n} n: The number of timer interrupt request generation during measuring. A A A A A 7 7 7 7 8 • When the period from falling edge until the next falling edge is measured (Note) 6 |
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