Datasheet

10
AT89C51IC2
4301D–8051–02/08
Pin Configurations
Figure 2. Pin Configurations
18 19 23222120 262524 27 28
5 4 3 2 1 6
44 43 42 41 40
P1.4/CEX1 P1.0/T2/XTALB1 P1.1/T2EX/SS P1.3/CEX0 P1.2/ECI XTALB2 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
PI2.0/SCL
P2.7/A15
P2.5/A13
P2.6/A14
P3.6/WR
P3.7/RD
XTAL2 XTAL1
VSS
P2.0/A8 P2.1/A9
P2.2/A10 P2.3/A11 P2.4/A12
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
P0.3/AD3
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 3944 38 37 36 35 34
P1.4/CEX1 P1.0/T2/XTALB1 P1.1/T2EX/SS P1.3/CEX0 P1.2/ECI XTALB2 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
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
P3.6/WR
P3.7/RD
XTAL2
XTAL1
VSS
P2.0/A8
P2.1/A9
P2.2/A10
P2.3/A11
P2.4/A12
NIC*
12 13 17161514 201918 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