M38027E8SP Datasheet, PDF (25/51 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3802 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
b7
b0
PWM control register
(PWMCON : address 002B16)
PWM function enable bit
0: PWM disabled
1: PWM enabled
Count source selection bit
0: f(XIN)
1: f(XIN)/2
Not used (return “0” when read)
Fig. 20 Structure of PWM control register
PWM output
PWM register
write signal
B= C
A
B
C
T T2
T
T
T2
(Changes from “A” to “B” during “H” period)
PWM prescaler
write signal
(Changes from “T” to “T2” during PWM period)
When the contents of the PWM register or PWM prescaler have changed, the PWM
output will change from the next period after the change.
Fig. 21 PWM output timing when PWM register or PWM prescaler is changed
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