Aug.2007

www.eorex.com

Address

04H

bit7

bit6

bit5

bit4

bit3

bit2

bit1

bit0

Name

T0BF

1/0

1/0

1/0

1/0

1/0

1/0

1/0

1/0

Read or Write

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

Default Value

#

#

#

#

#

#

#

#

Address

05H

bit7

bit6

bit5

bit4

bit3

bit2

bit1

bit0

Name

T0C

T0EN

T0F

T0CK

#

#

Timer0 pre-scaler

Read or Write

R/W

R/W

R/W

#

#

R/W

R/W

R/W

Default Value

0

#

#

#

#

#

#

#

Note:

*T0EN : timer0 enable flag

T0EN = 1, load T0BF content (preload buffer data) into timer0 and enable timer0 start to down

count.

T0EN = 0, stop timer0 counting. User can get timer0 data by reading T0BF register. (LDA

T0BF)

* when T0EN=0, write data to T0BF(04H), data will be directly passed to timer0 counter.

T0F : timer0 underflow flag

T0F = 1, timer0 underflow;

T0F = 0, timer0 not underflow.

*T0CK : timer0 clock source option bit

T0CK = 1, clock source from ExCLK/PB3 pin. User can set T0CK=1, ExCLK/PB3 is optioned as

external clock input pin that connect to Timer0. Before this, user should set PBIO.3=1 and

PBPH.3 internal pull-up resistor could be enabled or disabled.

T0CK = 0, clock source from Fosc.

*There is no default data with T0CK bit, user should preset this bit after power on reset.

bit2

bit1

bit0

0

0

0

0

0

1

0

1

0

0

1

1

1

#

#

10/21