7721 datasheet(166/577 Pages) RENESAS

tên linh kiện	7721

Giải thích chi tiết về linh kiện	16-BIT SINGLE-CHIP MICROCOMPUTER

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TIMER A

7721 Group User’s Manual

8–47

8.6 Pulse width modulation (PWM) mode

[Precautions for PWM mode]

1. If the count start bit is cleared to “0” while outputting PWM pulses, the counter stops counting. When the

TAjOUT pin was outputting “H” level at that time, the output level becomes “L” and the timer Aj interrupt

request bit is set to “1.” When the TAjOUT pin was outputting “L” level, the output level does not change

and a timer Aj interrupt request does not occur.

2. When the timer’s operating mode is set by one of the following procedures, the timer Aj interrupt request

bit is set to “1.”

qWhen the PWM mode is selected after reset

qWhen the operating mode is switched from the timer mode to the PWM mode

qWhen the operating mode is switched from the event counter mode to the PWM mode

Accordingly, when using the timer Aj interrupt (interrupt request bit), be sure to clear the timer Aj interrupt

request bit to “0” after the above setting.

7721 bảng dữ liệu(PDF) 166 Page - Renesas Technology Corp