MC912DG128ACPVE Datasheet, PDF (226/478 Pages) Freescale Semiconductor, Inc – Upward compatible with M68HC11 instruction set

Freescale Semiconductor, Inc.
Pulse Width Modulator
possible to know where the count is with respect to the duty value and
software can be used to make adjustments by turning the enable bit off
and on.
The four PWM channel outputs share general-purpose port P pins.
Enabling PWM pins takes precedence over the general-purpose port.
When PWM are not in use, the port pins may be used for discrete
input/output.
CLOCK SOURCE
(ECLK or Scaled ECLK)
GATE
(CLOCK EDGE SYNC)
PWCNTx
RESET
CENTR = 0
UP/DOWN
8-BIT COMPARE =
PWDTYx
PWENx
SYNC
PPOL = 0
8-BIT COMPARE =
PWPERx
FROM PORT P
DATA REGISTER
S
Q
MUX
Q
R
PPOLx
MUX
TO PIN
DRIVER
PPOL = 1
PWDTY
PWPER
Figure 14-1. Block Diagram of PWM Left-Aligned Output Channel
Technical Data
226
MC68HC912DT128A — Rev 4.0
Pulse Width Modulator
For More Information On This Product,
Go to: www.freescale.com
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