M16C65 Datasheet, PDF (473/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
21. Pulse Width Modulator
PWMENi bit in the ₁
PWMCON1 register
PWMi prescaler
pre-latch
m
Set the PWMREGi register by a program
PWMi register pre-latch
n
00h
n
FFh
n
PWMi prescaler latch
m
PWMi register latch
n
00h
n
FFh
n
(m+1) × n
fj
Low level is output in this cycle
when PWMi register latch is 00h
High level is output in this cycle
when PWMi register latch is FFh
PWMi output
(2⁸-1) × (m+1)
fj
PWMPREi register remains unchaged and so does PWM cycle
i: 0, 1
fj: PWM count source frequency
The above applies when the PWMPORTi bit in the PWMCON1 register is set to 1 (PWMi output).
Figure 21.3 PWMi Output Example (Duty 0%, Duty 100%)
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
Page 438 of 791