Freescale Semiconductor, Inc.
Pulse Width Modulator
Bit 7
Bit 7
0
6
6
0
5
5
0
4
4
0
3
3
0
2
2
0
1
1
0
Bit 0
Bit 0
0
RESET:
PWSCNT0 — PWM Scale Counter 0 Value
$0045
PWSCNT0 is a down-counter that, upon reaching $00, loads the value
of PWSCAL0. Read any time.
Bit 7
Bit 7
0
6
6
0
5
5
0
4
4
0
3
3
0
2
2
0
1
1
0
Bit 0
Bit 0
0
RESET:
PWSCAL1 — PWM Scale Register 1
$0046
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.
Bit 7
Bit 7
0
6
6
0
5
5
0
4
4
0
3
3
0
2
2
0
1
1
0
Bit 0
Bit 0
0
RESET:
PWSCNT1 — PWM Scale Counter 1 Value
$0047
PWSCNT1 is a down-counter that, upon reaching $00, loads the value
of PWSCAL1. Read any time.
Advance Information
190
68HC(9)12D60 — Rev 4.0
Pulse Width Modulator
MOTOROLA
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA [ MOTOROLA ]
