CHAPTER 11 PWM UNIT
User’s Manual U11969EJ3V0UM00
327
11.3 Control Register
(1) PWM control register 0 to 3 (PWMC0 to PWMC3)
Controls PWMn operation, specifies the output active level, and specifies the bit length of the main pulse.
This register can be read/written in 8- or 1-bit units. The contents of this register can also be changed during
PWMn operation (PWME = 1).
Bit Position
Bit Name
Function
7 to 5
PMPn2 to
PWM Main Pulse
`
PMPn0
Specifies bit length of x-bit down counter (main pulse)
PMPn2 PMPn1 PMPn0
Bit Length
0
0
0
8 bits
0
0
1
7 bits
0
1
0
6 bits
0
1
1
5 bits
1
0
0
4 bits
Others
Setting prohibited
2
SYNn
Rewrite Cycle
Specifies PWM pulse width rewrite cycle
0: Large cycle (every PWM 2
x+8
cycles (2
x+8
/f
PWMC
))
1: Small cycle (every PWM 1 cycle (2
x
/f
PWMC
))
1
PWMEn
PWM Enable
Controls operation/stop of PWMn
0: Operation stops
1: Operation in progress
PWM counter is cleared by changing this bit from 0 to 1.
0
PALVn
PWM Active Level
Specifies PWMn active level
0: Active low
1: Active high
Remark
n = 0 to 3
x: number of bits set with PRM
Address
FFFFF360H to
FFFFF378H
7
PMPn2
PWMCn
6
PMPn1
5
PMPn0
4
0
3
0
2
SYNn
1
PWMEn
0
PALVn
After reset
05H
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