mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 409

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Table 12-12
mode.
12.4.2.8
Table 12-13
or center aligned) and 8-bit (normal) or 16-bit (concatenation):
12.5
The reset state of each individual bit is listed within the register description section (see
“Memory Map and Register Definition,”
functions or modes which are initialized during or just following reset are described within this section.
12.6
The PWM8B6CV1 module has only one interrupt which is generated at the time of emergency shutdown,
if the corresponding enable bit (PWMIE) is set. This bit is the enable for the interrupt. The interrupt flag
PWMIF is set whenever the input level of the PWM5 channel changes while PWM5ENA=1 or when
PWMENA is being asserted while the level at PWM5 is active.
“PWM Shutdown Register (PWMSDN).”
Freescale Semiconductor
A description of the registers involved and affected due to this interrupt is explained in
•
•
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.
Resets
Interrupts
summarizes the boundary conditions for the PWM regardless of the output mode (left aligned
is used to summarize which channels are used to set the various control bits when in 16-bit
PWM Boundary Cases
1
CONxx
CON45
CON23
CON01
Counter = 0x0000 and does not count.
(indicates no duty)
(indicates no duty)
>= PWMPERx
>= PWMPERx
PWMDTYx
0x0000
0x0000
XX
XX
Table 12-12. 16-bit Concatenation Mode Summary
PWMEx
PWME5
PWME3
PWME1
Table 12-13. PWM Boundary Cases
MC9S12E256 Data Sheet, Rev. 1.08
(indicates no period)
(indicates no period)
which details the registers and their bit-fields. All special
PPOLx
PPOL5
PPOL3
PPOL1
PWMPERx
>0x0000
>0x0000
0x0000
0x0000
XX
XX
1
1
PCLKx
PCLK5
PCLK3
PCLK1
PPOLx
CAEx
CAE5
CAE3
CAE1
1
0
1
0
1
0
Chapter 12 Pulse-Width Modulator (PWM8B6CV1)
PWMx Output
PWMx Output
Always High
Always High
Always High
Always Low
Always Low
Always Low
PWM5
PWM3
PWM1
Section 12.3.2.15,
Section 12.3,
409