HT45RM03 datasheet(24/54 Pages) HOLTEK

24 / 54 page

mentary PWM output with dead time is shown below.

Bit No.

Label

Function

PWMEN

To enable/disable PWM output (0=disabled; 1=enabled)

PWMCEN

To enable/disable PWM Complementary output (0=disabled; 1=enabled)

DTEN

To enable/disable PWM Complementary output with dead time

(0=without dead time; 1=with dead time)

PWMPS0

PWMPS1

PWMPS2

These three bits select the PWM clock prescaler rate.

PWMDT0

PWMDT1

These two bits select the PWM Complementary output dead time

PWMC (1CH) Register

The bits 3~5 of the PWM control register (PWMC) can be used to define the pre-scaling stages of the PWM clock.

PWMPS2

PWMPS1

PWMPS0

To Define the Prescaler Stages

000

fPWM=fSYS

001

fPWM=fSYS/2

010

fPWM=fSYS/4

011

fPWM=fSYS/8

100

fPWM=fSYS/16

101

fPWM=fSYS/32

110

fPWM=fSYS/64

111

fPWM=fSYS/128

PWM period according different PWM prescaler rate bits and system clock.

PWMPS2

PWMPS1

PWMPS0

fSYS=4MHz

fSYS=8MHz

fSYS=12MHz

Unit

3.91

7.81

11.72

kHz

1.95

3.91

5.86

0.98

1.95

2.93

0.49

0.98

1.46

0.24

0.49

0.73

0.12

0.24

0.37

0.06

0.12

0.18

0.03

0.06

0.09

10-bit PWM Full Frequency (fSYS is 4, 8, 12MHz)

HT45RM03

Rev. 1.10

February 16, 2007

P C 0 , P C 2 o r P C 4

P C 1 , P C 3 o r P C 5

0 : P W M I n a c t i v e

1 : P W M A c t i v e

P W M 0 , P W M 1 o r P W M 2

P W M D u t y

D T

P W M P e r i o d

PWM and Complementary PWM Output With Dead Time (PWMLEV & PWMCLEV =

²0² & ²0²)

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