HT49CV3 datasheet(18/44 Pages) HOLTEK

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HT49RV3/HT49CV3

Rev. 1.30

March 20, 2007

Bit No.

Label

Function

0~2

T0PSC0~

T0PSC2

Defines the prescaler stages.

T0PSC2, T0PSC1, T0PSC0=

000: fINT=fSYS

001: fINT=fSYS/2

010: fINT=fSYS/4

011: fINT=fSYS/8

100: fINT=fSYS/16

101: fINT=fSYS/32

110: fINT=fSYS/64

111: fINT=fSYS/128

T0E

Defines the TMR0 active edge of the timer/event counter:

In Event Counter Mode (T0M1,T0M0)=(0,1):

1:count on falling edge;

0:count on rising edge

In Pulse Width measurement mode (T0M1,T0M0)=(1,1):

1: start counting on the rising edge, stop on the falling edge;

0: start counting on the falling edge, stop on the rising edge

T0ON

Enable/disable timer counting (0=disable; 1=enable)

Unused bit, read as

²0²

T0M0

T0M1

Defines the operating mode (T0M1, T0M0)

01= Event count mode (External clock)

10= Timer mode (Internal clock)

11= Pulse Width measurement mode (External clock)

00= Unused

TMR0C (0EH) Register

Bit No.

Label

Function

0~2

Unused bit, read as

²0²

T1E

Defines the TMR1 active edge of the timer/event counter:

In Event Counter Mode (T1M1,T1M0)=(0,1):

1:count on falling edge;

0:count on rising edge

In Pulse Width measurement mode (T1M1,T1M0)=(1,1):

1: start counting on the rising edge, stop on the falling edge;

0: start counting on the falling edge, stop on the rising edge

T1ON

Enable/disable timer counting (0= disable; 1= enable)

T1S

Defines the TMR1 internal clock source (0=fSYS/4; 1=32768Hz)

T1M0

T1M1

Defines the operating mode (T1M1, T1M0)

01= Event count mode (External clock)

10= Timer mode (Internal clock)

11= Pulse Width measurement mode (External clock)

00= Unused

TMR1C (11H) Register

HT49CV3 Datasheet(PDF) 18 Page - Holtek Semiconductor Inc

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