CHAPTER 7 TIMER/COUNTER FUNCTION
User’s Manual U13850EJ4V0UM
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(1) Basic operation of the PWM output
Setting method
(1) Set the port latch and port mode register n to 0.
(2) Set the active level width in 8-bit compare register n (CRn0).
(3) Select the count clock with timer clock selection register n0, n1 (TCLn0, TCLn1).
(4) Set the active level in bit 1 (TMCn1) of TMCn.
(5) If bit 7 (TCEn) of TMCn is set to 1, counting starts. When counting stops, set TCEn to 0.
PWM output operation
(1) When counting starts, the PWM output (output from TOn) outputs the inactive level until an overflow
occurs.
(2) When the overflow occurs, the active level specified in step (1) in the setting method is output. The active
level is output until CRn0 and the count of 8-bit counter n (TMn) match.
(3) The PWM output after CRn0 and the count match is the inactive level until an overflow occurs again.
(4) Steps (2) and (3) repeat until counting stops.
(5) If counting is stopped by TCEn = 0, the PWM output goes to the inactive level.
Remark
n = 2 to 5
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