MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 228

• Manufacturer Part Number: MC68HC12
• Description: The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit
• Manufacturer: MOTOROLA [Motorola, Inc]

Pulse Width Modulator
Technical Data
228
LIMBDM
ECLK
PSBCK
*CLOCK S0 = (CLOCK A)/2, (CLOCK A)/4, (CLOCK A)/6,... (CLOCK A)/512
**CLOCK S1 = (CLOCK B)/2, (CLOCK B)/4, (CLOCK B)/6,... (CLOCK B)/512
BITS:
PCKB2,
PCKB1,
PCKB0
0:0:0
0:0:1
0:1:0
0:1:1
1:0:0
1:0:1
1:1:0
1:1:1
PSBCK IS BIT 0 OF PWCTL REGISTER.
INTERNAL SIGNAL LIMBDM IS ONE IF THE MCU IS IN BACKGROUND DEBUG MODE.
REGISTER:
PWPRES
÷
÷
÷
÷
÷
÷
÷
2
2
2
2
2
2
2
0:0:0
0:0:1
0:1:0
1:0:0
1:1:0
0:1:1
1:0:1
1:1:1
BITS:
PCKA2,
PCKA1,
PCKA0
Figure 14-3. PWM Clock Sources
Pulse Width Modulator
8-BIT DOWN COUNTER
8-BIT SCALE REGISTER
8-BIT DOWN COUNTER
8-BIT SCALE REGISTER
PWSCNT1
PWSCNT0
PWSCAL1
PWSCAL0
CLOCK B
CLOCK A
= 0
= 0
÷
÷
2
2
MC68HC912DT128A — Rev 4.0
PCLK3
PCLK2
PCLK0
PCLK1
CLOCK TO PWM
CHANNEL 3
CLOCK TO PWM
CHANNEL 1
CLOCK TO PWM
CHANNEL 2
CLOCK TO PWM
CHANNEL 0
MOTOROLA