eorex

EU1010

Feb.2009

www.eorex.com

Figure_C

Timer1

Address

06H

bit7

bit6

bit5

bit4

bit3

bit2

bit1

bit0

Name

T1BF0

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

07H

bit7

bit6

bit5

bit4

bit3

bit2

bit1

bit0

Name

T1BF1

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

#

#

#

#

#

#

#

#

Timer1 is a 16-bit down count timer. T1BF0(06H)/low byte and T1BF1(07H)/high byte are timer1 preload

buffer. Timer1 clock source could come from CPU main oscillator (Fosc), refer to figure_D. Timer1 can

work in two kinds of operating mode. One mode is normal 16-bit timer/counter mode and the other one is

specially designed for different interrupt time period.

Figure_D

Timer/counter mode

by every input clock when timer1 turns on by T1EN=1. When timer1 is down count from 0000H to FFFFH,

T1F bit will be set to “1”. At the same time, if T1INT=1, the timer1 interrupt occurs. Timer1 will

automatically reload data from preload buffer T1BF0(06H) and T1BF1(07H). Therefore, user can preset

T1BF0(06H) and T1BF1(07H) buffer data before different interrupt time duties caused by timer1

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