MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 540

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

Pulse-Width Modulator (S12PWM8B8CV2)
1
2
17.3.2.1
Each PWM channel has an enable bit (PWMEx) to start its waveform output. When any of the PWMEx
bits are set (PWMEx = 1), the associated PWM output is enabled immediately. However, the actual PWM
waveform is not available on the associated PWM output until its clock source begins its next cycle due to
the synchronization of PWMEx and the clock source.
An exception to this is when channels are concatenated. Once concatenated mode is enabled (CONxx bits
set in PWMCTL register), enabling/disabling the corresponding 16-bit PWM channel is controlled by the
low order PWMEx bit. In this case, the high order bytes PWMEx bits have no effect and their
corresponding PWM output lines are disabled.
While in run mode, if all existing PWM channels are disabled (PWMEx–0 = 0), the prescaler counter shuts
off for power savings.
Read: Anytime
Write: Anytime
540
RESERVED
RESERVED
RESERVED
The related bit is available only if corresponding channel exists.
The register is available only if corresponding channel exists.
Register
Reset
Name
This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
W
R
PWME7
W
W
W
R
R
R
PWM Enable Register (PWME)
0
7
The first PWM cycle after enabling the channel can be irregular.
Bit 7
0
0
0
Figure 17-2. The scalable PWM Register Summary (Sheet 1 of 4)
PWME6
0
6
= Unimplemented or Reserved
6
0
0
0
Figure 17-3. PWM Enable Register (PWME)
MC9S12G Family Reference Manual,
PWME5
5
0
5
0
0
0
PWME4
NOTE
0
4
4
0
0
0
PWME3
0
3
3
0
0
0
Rev.1.01
PWME2
2
0
2
0
0
0
PWME1
Freescale Semiconductor
0
1
1
0
0
0
PWME0
Bit 0
0
0
0
0
0