MC9S12XD256MAL Datasheet, PDF (373/1348 Pages) Freescale Semiconductor, Inc – Freescale’s Scalable Controller Area Network

Chapter 8 Pulse-Width Modulator (S12PWM8B8CV1)
Read: Anytime
Write: Anytime
NOTE
Write these bits only when the corresponding channel is disabled.
Table 8-7. PWMCAE Field Descriptions
Field
7–0
CAE[7:0]
Description
Center Aligned Output Modes on Channels 7–0
0 Channels 7–0 operate in left aligned output mode.
1 Channels 7–0 operate in center aligned output mode.
8.3.2.6 PWM Control Register (PWMCTL)
The PWMCTL register provides for various control of the PWM module.
7
6
5
4
3
2
1
0
R
0
0
CON67
CON45
CON23
CON01
PSWAI
PFRZ
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 8-8. PWM Control Register (PWMCTL)
Read: Anytime
Write: Anytime
There are three control bits for concatenation, each of which is used to concatenate a pair of PWM
channels into one 16-bit channel. When channels 6 and 7are concatenated, channel 6 registers become the
high order bytes of the double byte channel. When channels 4 and 5 are concatenated, channel 4 registers
become the high order bytes of the double byte channel. When channels 2 and 3 are concatenated, channel
2 registers become the high order bytes of the double byte channel. When channels 0 and 1 are
concatenated, channel 0 registers become the high order bytes of the double byte channel.
See Section 8.4.2.7, “PWM 16-Bit Functions” for a more detailed description of the concatenation PWM
Function.
NOTE
Change these bits only when both corresponding channels are disabled.
MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor
373