MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 535

• Manufacturer Part Number: MC9S12G
• Description: Ignores external trigger. Performs one conversion sequence and stops.
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 17
Pulse-Width Modulator (S12PWM8B8CV2)
17.1
The Version 2 of S12 PWM module is a channel scalable and optimized implementation of S12
PWM8B8C Version 1. The channel is scalable in pairs from PWM0 to PWM7 and the available channel
number is 2, 4, 6 and 8. The shutdown feature has been removed and the flexibility to select one of four
clock sources per channel has improved. If the corresponding channels exist and shutdown feature is not
used, the Version 2 is fully software compatible to Version 1.
17.1.1
The scalable PWM block includes these distinctive features:
17.1.2
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.
Wait:
Freeze:
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This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
Up to eight independent PWM channels, scalable in pairs (PWM0 to PWM7)
Available channel number could be 2, 4, 6, 8 (refer to device specification for exact number)
Programmable period and duty cycle for each channel
Dedicated counter for each PWM channel
Programmable PWM enable/disable for each channel
Software selection of PWM duty pulse polarity for each channel
Period and duty cycle are double buffered. Change takes effect when the end of the effective period
is reached (PWM counter reaches zero) or when the channel is disabled.
Programmable center or left aligned outputs on individual channels
Up to eight 8-bit channel or four 16-bit channel PWM resolution
Four clock sources (A, B, SA, and SB) provide for a wide range of frequencies
Programmable clock select logic
Introduction
Features
Modes of Operation
The prescaler keeps on running, unless PSWAI in PWMCTL is set to 1.
The prescaler keeps on running, unless PFRZ in PWMCTL is set to 1.
MC9S12G Family Reference Manual, Rev.1.01
535