S912XEG128J2VAL
Model | S912XEG128J2VAL |
Description | IC,MICROCONTROLLER,16-BIT,CPU12 CPU,CMOS,QFP,112PIN,PLASTIC |
PDF file | Total 1327 pages (File size: 7M) |
Chip Manufacturer | ROCHESTER |
Chapter 19 Pulse-Width Modulator (S12PWM8B8CV1)
19.1.2
Modes of Operation
Because of an order from the United States International Trade Commission, BGA-packaged product lines and part numbers indicated here currently are not
available from Freescale for import or sale in the United States prior to September 2010: S12XE products in 208 MAPBGA packages
There is a software programmable option for low power consumption in wait mode that disables the input
clock to the prescaler.
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.
PWM8B8C
PWM Channels
Channel 7
Period and Duty
Channel 6
Counter
PWM7
PWM6
Counter
Bus Clock
Clock Select
PWM Clock
Period and Duty
Channel 5
Period and Duty
Control
Channel 4
Period and Duty
Counter
Counter
PWM5
PWM4
Channel 3
Enable
Period and Duty
Counter
PWM3
Polarity
Channel 2
Period and Duty
Counter
PWM2
Alignment
Channel 1
Period and Duty
Channel 0
Period and Duty
Counter
Counter
PWM1
PWM0
Figure 19-1. PWM Block Diagram
19.2
External Signal Description
The PWM module has a total of 8 external pins.
MC9S12XE-Family Reference Manual , Rev. 1.19
692
Freescale Semiconductor