HT46R232 datasheet(16/50 Pages) HOLTEK

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HT46R232/HT46C232

Rev. 1.40

November 23, 2005

The bit0~bit2 of the TMR0C can be used to define the pre-scaling stages of the internal clock sources of timer/event

counter. The definitions are as shown. The overflow signal of timer/event counter can be used to generate the PFD sig-

nal. The timer prescaler is also used as the PWM counter.

Bit No.

Label

Function

T0PSC0

T0PSC1

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=disabled; 1=enabled)

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

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=disabled; 1=enabled)

Unused bit, read as

²0²

T1M0

T1M1

Defines the operating mode, T1M1, T1M0:

01=Event count mode (external clock)

10=Timer mode (internal clock)

11=Pulse width measurement mode

00=Unused

TMR1C (11H) Register

HT46R232 Datasheet(PDF) 16 Page - Holtek Semiconductor Inc

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