Datasheet

Pulse Width Modulator
Technical Data MC68HC912D60A — Rev. 3.1
216 Pulse Width Modulator Freescale Semiconductor
PWSCNT0 is a down-counter that, upon reaching $00, loads the value
of PWSCAL0. Read any time.
Read and write anytime. A write will cause the scaler counter PWSCNT1
to load the PWSCAL1 value unless in special mode with DISCAL = 1 in
the PWTST register.
PWM channels 2 and 3 can select clock S1 (scaled) as its input clock by
setting the control bit PCLK2 and PCLK3 respectively. Clock S1 is
generated by dividing clock B by the value in the PWSCAL1 register + 1
and dividing again by two. When PWSCAL1 = $FF, clock B is divided by
256 then divided by two to generate clock S1.
PWSCNT1 is a down-counter that, upon reaching $00, loads the value
of PWSCAL1. Read any time.
Bit 7654321Bit 0
Bit 7654321Bit 0
RESET: 00000000
PWSCNT0 — PWM Scale Counter 0 Value $0045
Bit 7654321Bit 0
Bit 7654321Bit 0
RESET: 0 0 0 0 0 0 0 0
PWSCAL1 — PWM Scale Register 1 $0046
Bit 7654321Bit 0
Bit 7654321Bit 0
RESET: 0 0 0 0 0 0 0 0
PWSCNT1 — PWM Scale Counter 1 Value $0047