Rainbow Electronics T89C51RD2 - Manual (Page 5)

Rev. F - 15 February, 2001 5
T89C51RD2
5. Pin Configuration
P1.7CEX4
P1.4/CEX1
RST
P3.0/RxD
P3.1/TxD
P1.3CEX0
1
P1.5/CEX2
P1.6/CEX3
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6/WR
P3.7/RD
XTAL2
XTAL1
VSS P2.0/AD8
P2.1/AD9
P2.2/AD10
P2.3/AD11
P2.4/AD12
P0.4/AD4
P0.6/AD6
P0.5/AD5
P0.7/AD7
ALE/PROG
PSEN
EA
P2.7/AD15
P2.5/AD13
P2.6/AD14
P1.0/T2
P1.2/ECI
P1.1/T2EX
VCC
P0.0/AD0
P0.1/AD1
P0.2/AD2
P0.3/AD3
PDIL
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
18 19 23 22 21 20 26 25 24 27 28
5 4 3 2 1 6 44 43 42 41 40
P1.4/CEX1 P1.0/T2 P1.1/T2EX P1.3/CEX0 P1.2/ECI VSS1/NIC* VCC P0.0/AD0 P0.2/AD2 P0.1/AD1
P0.4/AD4
P0.6/AD6
P0.5/AD5
P0.7/AD7
ALE/PROG
PSEN
EA
NIC*
P2.7/A15
P2.5/A13
P2.6/A14
P3.6/WR P3.7/RD
XT
AL2
XT
AL1
VSS
P2.0/A8 P2.1/A9
P2.2/A10 P2.3/A11 P2.4/A12
43 42 41 40 39 44 38 37 36 35 34
P1.4/CEX1 P1.0/T2 P1.1/T2EX P1.3/CEX0 P1.2/ECI VSS1/NIC* VCC P0.0/AD0 P0.2/AD2 P0.3/AD3 P0.1/AD1
P0.4/AD4
P0.6/AD6
P0.5/AD5
P0.7/AD7
ALE/PROG
PSEN
EA
NIC*
P2.7/A15
P2.5/A13
P2.6/A14
P1.5/CEX2
P1.6/CEX3
P1.7/CEX4
RST
P3.0/RxD
NIC*
P3.1/TxD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6/WR P3.7/RD
XT
AL2
XT
AL1
VSS
P2.0/A8 P2.1/A9
P2.2/A10 P2.3/A11 P2.4/A12
P1.5/CEX2
P1.6/CEX3
P1.7/CEx4
RST
P3.0/RxD
NIC*
P3.1/TxD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P0.3/AD3
NIC*
NIC*
*NIC: No Internal Connection
7
8
9
10
11
12
13
14
15
16
17
39
38
37
36
35
34
33
32
31
30
29
PLCC
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