MC9S12T64 Datasheet, PDF (368/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Pulse Width Modulator (PWM8B8C)
Low Power Options
This section summarizes the low power options available in the PWM
module. Low power design practices are implemented where possible.
Run Mode
While in run mode, if all eight PWM channels are disabled (PWMEx=0 in
the PWME register, where x=0,1,...,7), the prescaler counter shuts off for
power savings (see Figure 60).
Wait Mode
The PWM will keep running in WAIT unless the PSWAI bit in the
PWMCTL register is enabled. This allows for lower power consumption
in WAIT mode by disabling the input clock to the prescaler. When in
WAIT mode with this bit set, no activity in the PWM occurs and the PWM
outputs go to a static state (high or low).
Stop Mode
In STOP mode, the PWM module is stopped since all the clocks from IP
bus to the module are stopped. The PWM outputs go to a static state
(high or low).
Reset Initialization
The reset state of each individual bit is listed within the Register
Description section (see Register Descriptions) which details the
registers and their bit-fields. All special functions or modes which are
initialized during or just following reset are described within this section.
• The 8-bit up/down counter is configured as an up counter out of
reset.
• All the channels are disabled and all the counters don’t count.
MC9S12T64Revision 1.1.1
368
Pulse Width Modulator (PWM8B8C)
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