SPMCK16Z4MPV20 datasheet(449/500 Pages) FREESCALE

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M68HC16 Z SERIES

USER’S MANUAL

D-75

FOC[5:1] — Force Output Compare

FOC[5:1] correspond to OC[5:1].

0 = Has no effect.

1 = Causes pin action programmed for corresponding OC pin, but the OC flag is

not set. FOC[5:1] correspond to OC[5:1].

FPWMA/B — Force PWM Value

0 = PWM pin A/B is used for PWM functions; normal operation.

1 = PWM pin A/B is used for discrete output. The value of the F1A/B bit will be driv-

en out on the PWMA/B pin. This is true for PWMA regardless of the state of the

PPROUT bit.

PPROUT — PWM Clock Output Enable

0 = Normal PWM operation on PWMA.

1 = Clock selected by PPR[2:0] is driven out PWMA pin.

PPR[2:0] — PWM Prescaler/PCLK Select

This field selects one of seven prescaler taps or PCLK to be PWMCNT input. Refer to

Table D-49.

SFA — PWMA Slow/Fast Select

0 = PWMA period is 256 PWMCNT increments long.

1 = PWMA period is 32768 PWMCNT increments long.

SFB — PWMB Slow/Fast Select

0 = PWMB period is 256 PWMCNT increments long.

1 = PWMB period is 32768 PWMCNT increments long.

Table D-50 shows a range of PWM output frequencies using 16.78 MHz, 20.97 MHz,

and 25.17 MHz system clocks.

Table D-49 PPR[2:0] Field

PPR[2:0]

System Clock Divide-By Factor

000

001

010

011

100

101

110

128

111

PCLK

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