Pulse-Width Modulator (S12PWM8B8CV1)
MC9S12XHY-Family Reference Manual, Rev. 1.01
442
Freescale Semiconductor
Figure 13-18. PWM Clock Select Block Diagram
128
2
4
8
16
32
64
PCKB2
PCKB1
PCKB0
M
U
X
Clock A
Clock B
Clock SA
Clock A/2, A/4, A/6,....A/512
Prescale
Scale
Divide b
y
PFRZ
F
reez
e Mode Signal
Bus Cloc
k
Clock Select
M
U
X
PCLK0
Clock to
PWM Ch 0
M
U
X
PCLK2
Clock to
PWM Ch 2
M
U
X
PCLK1
Clock to
PWM Ch 1
M
U
X
PCLK4
Clock to
PWM Ch 4
M
U
X
PCLK5
Clock to
PWM Ch 5
M
U
X
PCLK6
Clock to
PWM Ch 6
M
U
X
PCLK7
Clock to
PWM Ch 7
M
U
X
PCLK3
Clock to
PWM Ch 3
Load
DIV 2
PWMSCLB
Clock SB
Clock B/2, B/4, B/6,....B/512
M
U
X
PCKA2
PCKA1
PCKA0
PWME7-0
Count = 1
Load
DIV 2
PWMSCLA
Count = 1
8-Bit Down
Counter
8-Bit Down
Counter
Prescaler T
aps:
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