XC912BC32CFU8 Motorola Semiconductor Products, XC912BC32CFU8 Datasheet - Page 134

• Manufacturer Part Number: XC912BC32CFU8
• Description: M68HC12B Family Data Sheet
• Manufacturer: Motorola Semiconductor Products

Pulse-Width Modulator (PWM)
Data Sheet
134
CLOCK SOURCE
CLOCK EDGE SYNC
PWENx
PWENx
CLOCK SOURCE
CLOCK EDGE SYNC
PPOL = 0
PPOL = 1
(ECLK)
(ECLK)
GATE
Figure 11-2. Block Diagram of PWM Center-Aligned Output Channel
GATE
Figure 11-1. Block Diagram of PWM Left-Aligned Output Channel
PPOL = 0
PPOL = 1
PWDTY
RESET
PWCNTx
PWCNTx
Pulse-Width Modulator (PWM)
PWDTY
UP COUNTER ONLY
RESET
8-BIT COMPARE =
(PWPER − PWDTY)
8-BIT COMPARE =
8-BIT COMPARE
DUTY CYCLE
CENTR = 0
8-BIT COMPARE
CENTR = 1
PWPERx
PWDTYx
PERIOD
PWPERx
PWDTYx
PWPER
PWPER
×
2
×
2
S
T
R
Q
Q
Q
Q
PPOLx
PPOLx
MUX
DATA REGISTER
MUX
M68HC12B Family — Rev. 8.0
FROM PORT P
DATA REGISTER
FROM PORT P
PWDTY
MUX
MUX
MOTOROLA
DRIVER
TO PIN
DRIVER
TO PIN