T89C51RD2 ATMEL Corporation, T89C51RD2 Datasheet - Page 6

• Manufacturer Part Number: T89C51RD2
• Description: 0 to 40MHz Flash Programmable 8-bit Microcontroller
• Manufacturer: ATMEL Corporation

T89C51RD2
6
P1.3/CEX0
P1.4/CEX1
P1.1/T2EX
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
P1.2/ECI
P1.0/T2
P1.3/CEX0
P1.4/CEX1
P1.1/T2EX
NIC: No InternalConnection
VSS1
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
P1.2/EC1
VCC
P5.5
P5.6
P5.7
P4.0
P4.1
P4.2
P1.0/T2
VSS1
VCC
P5.5
P5.6
P5.7
P4.0
P4.1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27 28
9
8
29 30 31 32 33 34 35
7
10
12
13
14
15
16
1
2
3
4
5
6
7
8
9
11
64
17
6
63
18 19 20 21 22 23 24 25
5
62
61
4
60
PLCC 68
3
VQFP64 1.4
59
2
58
57
1 68 67 66 65 64 63
56
36 37 38 39 40 41
55
26
54
27 28 29 30 31 32
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
62 61
42 43
60
59
58
57
56
55
54
47
46
45
44
53
52
51
50
49
48
Rev. F - 15 February, 2001
P3.6/WR
P2.4/A12
P2.3/A11
P4.7
P2.2/A10
P2.1/A9
P2.0/A8
P4.6
NIC
VSS
P4.5
XTAL2
P3.7/RD
P4.4
P4.3
XTAL1
P5.0
P2.4/A12
P2.3/A11
P4.7
P2.2/A10
P2.1/A9
P2.0/A8
P4.6
NIC
VSS
P4.5
XTAL1
XTAL2
P3.7/RD
P4.4
P3.6/WR
P4.3