9
at89c51rd2/ed2
4235e–8051–04/04
管脚 配置
图示 2.
管脚 配置
43 42 41 40 3944 38 37 36 35 34
p1.4/cex1
p1.0/t2
p1.1/t2ex/ss
p1.3/cex0
p1.2/eci
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
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
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*
1213 17161514 201918 2122
33
32
31
30
29
28
27
26
25
24
23
at89c51rd2/ed2
1
2
3
4
5
6
7
8
9
10
11
vqfp44 1.4
NIC*
NIC*
NIC*
PLCC44
at89c51rd2/ed2
NIC*
NIC*
NIC*
PDIL40
p1.7cex4/mosi
p1.4/cex1
RST
p3.0/rxd
p3.1/txd
p1.3cex0
1
p1.5/cex2/miso
p1.6/cex3/sck
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/ss
VCC
p0.0/ad0
p0.1/ad1
p0.2/ad2
p0.3/ad3
AT89C51ED2
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 23222120 262524 27 28
5 4 3 2 16
44 43 42 41 40
p1.4/cex1
p1.0/t2
p1.1/t2ex/ss
p1.3/cex0
p1.2/eci
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
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
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
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