Datasheet

10
4235K–8051–05/08
AT89C51RD2/ED2
50
49
48
47
44
45
46
P4.5
P3.7/ RD
XTAL2
XTAL1
P4.4
P3.6/ WR
P4.3
NIC NIC
P3.1/TxD
P3.2/I
NT0
P3.3/
INT1
P3.4/T0 P3.5/T1
37 38 39 40 41 42 43
AT89C51ED2
PLCC68
P0.4/AD4 P5.4 P5.3 P0.5/AD5 P0.6/AD6 NIC P0.7/AD7 EA NIC ALE
P1.6/CEX3/SCK
P1.7/CEX4/MOSI
RST
NIC NIC NIC
P3.0/RxD
NIC
NIC
P1.5/CEX2/MISO
60
59
58
57
56
55
54
53
51
52
10
11
12
13
14
15
16
17
19
18
27 28 29 30 31 32 33 34 35 36
9 8 7 6 5 3 2 1
68
P5.0
P2.4/A12
P2.3/A11
P4.7
P2.2/A10
P4.6
P2.0/A8
P2.1/A9
NIC
VSS
P5.5
P0.3/AD3
P0.2/AD2
P5.6
P0.1/AD1
P0.0/AD0
P5.7
VCC
NIC
P1.0/T2
4
PSEN NIC P2.7/A15 P2.6/A14 P5.2 P5.1 P2.5/A13
67 65 64 63 62 61 66
20
21
22
23
26
25
24
P4.0
P1.1/T2EX/ SS
P1.2/ECI
P1.3/CEX0
P4.1
P1.4/CEX1
P4.2
NIC: Not Internaly Connected
54 53 52 51 50 49
AT89C51ED2
VQFP64
P0.4/AD4 P5.4 P5.3 P0.5/AD5 P0.6/AD6 P0.7/AD7 EA NIC ALE PSEN#
P1.5/CEX2/MISO
P1.6/CEX3/SCK
P1.7/A17/CEX4/MOSI
RST
NIC NIC NIC
P3.0/RxD
NIC
P4.2
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
P2.4/A12
P2.3/A11
P4.7
P2.2/A10
P2.1/A9
NIC
P4.6
P2.0/A8
VSS
P4.5
P5.5
P0.3/AD3
P0.2/AD2
P5.6
P0.1/AD1
P0.0/AD0
P5.7
VCC
NIC
P1.0/T2
11
12
13
16
15
14
P4.0
P1.1/T2EX/ SS
P1.2/ECI
P1.3/CEX0
P4.1
P1.4/CEX1
38
37
36
33
34
35
P3.7/ RD
XTAL2
XTAL1
P4.4
P3.6/ WR
P4.3
NIC
P3.1/TxD
P3.2/
INT0
P3.3
/INT1
P3.4/T0 P3.5/T1
27 28 29 30 31 32
P2.7/A15 P2.6/A14 P5.2 P5.1 P2.5/A13 P5.0