Datasheet

4
AT89C51AC3
4383D–8051–02/08
21 22 26252423 292827 30 31
5 4 3 2 1 6
52 51 50 49 48
8
9
10
11
12
13
14
15
16
17
18
46
45
44
43
42
41
40
39
38
37
36
PLCC52
7 47
19
20
32 33
34
35
P1.3/AN3/CEX0 P1.2/AN2/ECI P1.1/AN1/T2EX P1.0/AN 0/T2 VAREF VAGND RESET VSS VCC XTAL1 XTAL2
TESTI
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/SS
P4.3/SCK
ALE
PSEN
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.2 /AD2
P0.3 /AD3
P0.4 /AD4
P0.1 /AD1
P0.0 /AD0
P2.0/A8
P4.4/MOSI
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
P3.6/WR
P4.2/MISO
NC
NC
NC
TESTI must be connected to VSS
VCC
54 53 52 51 50 49
VQFP64
P1.3/AN3/CEX0 P1.2/AN2/ECI P1.1/AN1/T2EX P1.0/AN0/T2 VAREF VAGND RESET VSS VSS VSS
P3.7/RD
P4.0 P4.1
P2.7/A15 P2.6/A14
NC NC NC NC
P3.6/WR
48
47
46
45
44
43
42
41
39
40
1
2
3
4
5
6
7
8
10
9
17 18 19 20 21 22 23 24 25 26
64 63 62 61 60 59 58 57 56 55
NC
ALE
PSEN
P0.7/AD7
P0.6/AD6
NC
P0.5/AD5
NC
NC
P0.4/AD4
P1.4/AN4/CEX1
NC
P1.5/AN5/CEX2
P1.6/AN6/CEX3
P1.7/AN7/CEX4
NC
EA
NC
NC
P3.0/RxD
11
12
13
16
15
14
P4.3/SCK
P3.1/TxD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1/SS
38
37
36
33
34
35
P0.1/AD1
P0.2/AD2
P0.3/AD3
P4.4/MOSI
P0.0/AD0
P2.0/A8
P2.5/A13 P2.4/A12 P2.3/A11 P2.2/A10
P2.1/A9
P4.2/MISO
27 28 29 30 31 32
TESTI VCC VCC XTAL1 XTAL2 VCC
TESTI must be connected to VSS