Rainbow Electronics T89C51IC2 - Manual (Page 5)

5
T89C51IC2
Rev. C – 3-Dec-01
Pin Configurations
18 19 23 22 21 20 26 25 24 27 28
5 4 3 2 1 6 44 43 42 41 40
P
1
.4/C
E
X
1
P
1
.0/T
2/
X
T
A
L
B
1
P
1
.1/T
2E
X
/S
S
P
1
.3/C
E
X
0
P
1
.2/E
CI
XT
A
L
B2
VC
C
P
0
.0/A
D0
P
0
.2/A
D2
P
0
.1/A
D1
P0.4/AD4
P0.6/AD6
P0.5/AD5
P0.7/AD7
ALE/PROG
PSEN
EA
PI2.0/SCL
P2.7/A15
P2.5/A13
P2.6/A14
P
3
.6/W
R
P
3
.7/RD
XT
A
L
2
XT
A
L
1
VS
S
P
2
.0/A
8
P
2
.1/A
9
P
2
.2/A
10
P
2
.3/A
1
1
P
2
.4/A
12
P1.5/CEX2/MISO
P1.6/CEX3/SCK
P1.7/CEx4/MOSI
RST
P3.0/RxD
PI2.1/SDA
P3.1/TxD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P
0
.3
/A
D3
NIC
*
7
8
9
10
11
12
13
14
15
16
17
39
38
37
36
35
34
33
32
31
30
29
PLCC44
43 42 41 40 39 44 38 37 36 35 34
P1
.4
/C
E
X
1
P1
.0
/T
2
/XT
AL
B
1
P1
.1
/T
2
E
X
/SS
P1
.3
/C
E
X
0
P1
.2
/E
C
I
XT
A
L
B2
VC
C
P0
.0
/A
D
0
P0
.2
/A
D
2
P0
.3
/A
D
3
P0
.1
/A
D
1
P0.4/AD4
P0.6/AD6
P0.5/AD5
P0.7/AD7
ALE/PROG
PSEN
EA
PI2.0/SCL
P2.7/A15
P2.5/A13
P2.6/A14
P1.5/CEX2/MISO
P1.6/CEX3/SCK
P1.7/CEX4/MOSI
RST
P3.0/RxD
PI2.1/SDA
P3.1/TxD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P
3
.6
/W
R
P3
.7
/R
D
XT
A
L
2
XT
A
L
1
VS
S
P
2
.0
/A
8
P2
.1
/A
9
P
2
.2
/A
1
0
P
2
.3
/A
1
1
P
2
.4
/A
1
2
NI
C*
12 13 17 16 15 14 20 19 18 21 22
33
32
31
30
29
28
27
26
25
24
23
VQFP44 1.4
1
2
3
4
5
6
7
8
9
10
11