mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 214

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Pulse Width Modulator (PWM)
13.4 PWM Period and Resolution
Data Sheet
214
PWMDR = 256
PWMDR = 128
PWMDR = 255
NOTE:
PWMDR = 1
T =
P
CLK
1
T
The PWM period is equal to
P
(PWMDR) defines the period where the PWM output is high, the low
period is equal to 256 minus that value. Each PWM channel has its own
counter and I/O control bits so it can be turned on and off independently.
Figure 13-3
different values in the PWM data register.
CLK
Figure 13-3. PWM Output Waveforms
is the PWM counter clock. The value in the PWM data register
128 × T
Pulse Width Modulator (PWM)
shows the PWM output waveforms for a channel with
PWM PERIOD = 256 × T
255 × T
255 × T
256
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
×
-------------- -
P
CLK
1
, resolution is
128 × T
Freescale Semiconductor
-------------- -
P
CLK
1
T
, where