S912XEG384J3VA Datasheet, PDF (692/1324 Pages) Freescale Semiconductor, Inc – MC9S12XEP100 Reference Manual Covers MC9S12XE Family

Chapter 19 Pulse-Width Modulator (S12PWM8B8CV1)
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.
Bus Clock
PWM8B8C
PWM Channels
Channel 7
Period and Duty Counter
Clock Select ^{PWM Clock}
Control
Channel 6
Period and Duty Counter
Channel 5
Period and Duty Counter
Channel 4
Period and Duty Counter
Enable
Polarity
Alignment
Channel 3
Period and Duty Counter
Channel 2
Period and Duty Counter
Channel 1
Period and Duty Counter
Channel 0
Period and Duty Counter
PWM7
PWM6
PWM5
PWM4
PWM3
PWM2
PWM1
PWM0
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.
MC9S12XE-Family Reference Manual Rev. 1.25
692
Freescale Semiconductor