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AT89C51AC3
引脚配置
P1.3/AN3/CEX0
P1.2/AN2/ECI
P1.1/AN1/T2EX
P1.0 / AN 0 / T2
VAREF
VAGND
RESET
VSS
VCC
XTAL1
XTAL2
P1.4/AN4/CEX1
P1.5/AN5/CEX2
P1.6/AN6/CEX3
P1.7/AN7/CEX4
EA
P3.0/RxD
P3.1/TxD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
7
8
9
10
11
12
13
14
15
16
17
6
5
4
3
2
1
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
PLCC44
ALE
PSEN
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.4/AD4
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
P2.0/A8
P1.4/AN4/CEX1
P1.5/AN5/CEX2
P1.6/AN6/CEX3
P1.7/AN7/CEX4
EA
P3.0/RxD
P3.1/TxD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P1.3/AN3/CEX0
P1.2/AN2/ECI
P1.1/AN1/T2EX
P1.0 / AN 0 / T2
VAREF
VAGND
RESET
VSS
VCC
XTAL1
XTAL2
44 43 42 41 40 39 38 37 36 35 34
1
2
3
4
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
P3.6/WR
P3.7/RD
P4.0
P4.1
P2.7/A15
P2.6/A14
P2.5/A13
P2.4/A12
P2.3/A11
P2.2/A10
P2.1/A9
18
19
20
21
22
23
24
25
26
27
28
VQFP44
ALE
PSEN
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.4 / AD4
P0.3 / AD3
P0.2 / AD2
P0.1 / AD1
P0.0 / AD0
P2.0/A8
12 13 14 15 16 17 18 19 20 21 22
P3.6/WR
P3.7/RD
P4.0
P4.1
P2.7/A15
P2.6/A14
P2.5/A13
P2.4/A12
P2.3/A11
P2.2/A10
P2.1/A9
3
4383B–8051–01/05
