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)
Either left aligned or center aligned output mode can be used in concatenated mode and is controlled by
the low order CAEx bit. The high order CAEx bit has no effect.
Table 19-5
is used to summarize which channels are used to set the various control bits when in 16-bit
mode.
Table 19-5. 16-bit Concatenation Mode Summary
CONxx
CON67
CON45
CON23
CON01
PWMEx
PWME7
PWME5
PWME3
PWME1
PPOLx
PPOL7
PPOL5
PPOL3
PPOL1
PCLKx
PCLK7
PCLK5
PCLK3
PCLK1
CAEx
CAE7
CAE5
CAE3
CAE1
PWMx
Output
PWM7
PWM5
PWM3
PWM1
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
19.4.2.8
PWM Boundary Cases
Table 19-6
summarizes the boundary conditions for the PWM regardless of the output mode (left aligned
or center aligned) and 8-bit (normal) or 16-bit (concatenation).
Table 19-6. PWM Boundary Cases
PWMDTYx
$00
(indicates no duty)
$00
(indicates no duty)
XX
XX
>= PWMPERx
PWMPERx
>$00
>$00
$00
(1)
(indicates no period)
$00
1
(indicates no period)
XX
PPOLx
1
0
1
0
1
0
PWMx Output
Always low
Always high
Always high
Always low
Always high
Always low
>= PWMPERx
XX
1. Counter = $00 and does not count.
19.5
Resets
The reset state of each individual bit is listed within the
Section 19.3.2, “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 do not count.
MC9S12XE-Family Reference Manual , Rev. 1.19
720
Freescale Semiconductor
