Dac0808

4

3

2

D

VCC

P1

To Programmer C

1 2 3 4 5 6 1

VCC

2

1N4148

1k

1k B

VCC

P1.0/T2 P1.1/T2-EX P1.2 P1.3 P1.4/SS P1.5/MOSI P1.6/MISO P1.7/SCK

19 18 9

XTAL1 XTAL2 RST

31

EA/VPP

40

VCC

P2.0/A8 P2.1/A9 P2.2/A10 P2.3/A11 P2.4/A12 P2.5/A13 P2.6/A14 P2.7/A15

1 2 3 4 5 6 7 8

P3.0/RXD P3.1/TXD P3.2/INTO P3.3/INT1 P3.4/TO P3.5/T1 P3.6/WR P3.7/RD

10 11 12 13 14 15 16 17

1 2 3 4 5 6 7 8

PSEN

29

ALE/PROG

30

13

to P0

DAC0808

8 7 6 5 4 3 2 1

P3

5

B1

4

6

B2

2

7

B3

1

8

B4

9

B5

10

B6

11

B7

12

B8

Vr+ Vr-

COMP

RF 5K

4

1 2 3 4 5 6 7 8

P0.0/AD0 P0.1/AD1 P0.2/AD2 P0.3/AD3 P0.4/AD4 P0.5/AD5 P0.6/AD6 P0.7/AD7

21 22 23 24 25 26 27 28

-12V

2 3

6 Voutput

741 5K R14

+5V

12V

14 15

107

7

1 2 3 4 5 6 7 8

xtal1 xtal2

VCC 10uF

1 2 3 4 5 6 7 8

39 38 37 36 35 34 33 32

D

5V

P2

AT89S51

+

P0

1

-

5

5K

C

R15

16 C1 15pF

3

-12V

30p Xtal1

B

CRYSTAL 1 2 M Hz

Reset

Xtal2 30p

A

A

Title Size A Date: 5

4

3

DAC0808 Circuit Interface Document Number

Rev

Triwiyanto

Friday, April 07, 2006 2

Sheet

1

of 1

1