MC68331MFC16 datasheet(81/84 Pages) FREESCALE

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MC68331TS/D

F1B — Force Logic Level One on PWMB

0 = Force logic level zero output on PWMB pin

1 = Force logic level one output on PWMB pin

PWMA/PWMB — PWM Control Registers A/B

$YFF926, $YFF927

These registers are associated with the pulse-width value of the PWM output on the corresponding

PWM pin. A value of $00 loaded into one of these registers results in a continuously low output on the

corresponding pin. A value of $80 results in a 50% duty cycle output. Maximum value ($FF) selects an

output that is high for 255/256 of the period.

PWMCNT — PWM Count Register

$YFF928

PWMCNT is the 16-bit free-running counter associated with the PWM functions of the GPT module.

PWMBUFA/B — PWM Buffer Registers A/B

$YFF92A, $YFF92B

These read-only registers contain values associated with the duty cycles of the corresponding PWM.

Reset state is $0000.

PRESCL — GPT Prescaler

$YFF92C

The 9-bit prescaler value can be read from bits [8:0] at this address. Bits [15:9] always read as zeros.

Reset state is $0000.

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MC68331MFC16 Datenblatt(PDF) 81 Page - Freescale Semiconductor, Inc