XTAL218

XTAL119

ALE30EA31PSEN29

RST9

P0.0/AD0 39P0.1/AD1 38P0.2/AD2 37P0.3/AD3 36P0.4/AD4 35P0.5/AD5 34P0.6/AD6 33P0.7/AD7 32

P1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78

P3.0/RXD 10P3.1/TXD 11P3.2/INT0 12P3.3/INT1 13

P3.4/T0 14

P3.7/RD 17P3.6/WR 16P3.5/T1 15

P2.7/A15 28

P2.0/A8 21P2.1/A9 22

P2.2/A10 23P2.3/A11 24P2.4/A12 25P2.5/A13 26P2.6/A14 27

U1

AT89C51

X1CRYSTAL

C1

33p

C2

33p

C31uFR1

10k

+5v

+-

OUT1 21

ADD B24ADD A25

ADD C23

VREF(+)12VREF(-)16

IN31IN42IN53IN64IN75

START 6

OUT5 8

EOC 7

OE 9

CLOCK 10

OUT2 20

OUT7 14OUT6 15

OUT8 17

OUT4 18OUT3 19

IN228IN127IN026

ALE22

U3

ADC0808

+3V

X-axis

Xbee TxXbee Rx

Yaxis