Datasheet

Chapter 19 Pulse-Width Modulator (S12PWM8B8CV1)
MC9S12XE-Family Reference Manual Rev. 1.25
692 Freescale Semiconductor
In freeze mode there is a software programmable option to disable the input clock to the prescaler. This is
useful for emulation.
19.1.3 Block Diagram
Figure 19-1 shows the block diagram for the 8-bit 8-channel PWM block.
Figure 19-1. PWM Block Diagram
19.2 External Signal Description
The PWM module has a total of 8 external pins.
19.2.1 PWM7 — PWM Channel 7
This pin serves as waveform output of PWM channel 7 and as an input for the emergency shutdown
feature.
Period and Duty Counter
Channel 6
Clock Select
PWM Clock
Period and Duty Counter
Channel 5
Period and Duty Counter
Channel 4
Period and Duty Counter
Channel 3
Period and Duty Counter
Channel 2
Period and Duty Counter
Channel 1
Alignment
Polarity
Control
PWM8B8C
PWM6
PWM5
PWM4
PWM3
PWM2
PWM1
Enable
PWM Channels
Period and Duty Counter
Channel 7
Period and Duty Counter
Channel 0
PWM0
PWM7
Bus Clock