Renesas 7700 FAMILY User Manual page 129

TIMER A
5.6 Pulse width modulation (PWM) mode
[Precautions when operating in PWM mode]
1. If the count start bit is cleared to "0" while outputting PWM pulses, the counter stops counting. When the
TAi pin was outputting "H" level at that time, the output level becomes "L" and the timer Ai interrupt
OUT
request bit is set to "1." When the TAi
and the timer Ai interrupt request does not occur.
2. When setting the timer's operating mode in one of the followings, the timer Ai interrupt request bit is set
to "1."
When the PWM mode is selected after a reset
When the operating mode is switched from the timer mode to PWM mode
When the operating mode is switched from the event counter mode to the PWM mode
Therefore, when using the timer Ai interrupt (interrupt request bit), be sure to clear the timer Ai interrupt
request bit to "0" after the above setting.
5–48
pin was outputting "L" level, the output level does not change
OUT
7751 Group User's Manual