AT89C51RB2-RLTCM ATMEL [ATMEL Corporation], AT89C51RB2-RLTCM Datasheet - Page 8

• Manufacturer Part Number: AT89C51RB2-RLTCM
• Description: 8-bit Microcontroller with 16K/ 32K Bytes Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Pin Configurations
Figure 2. Pin Configurations
8
P1.5/CEX2/MISO
*NIC: No Internal Connection
P1.7CEX4/MOSI
P1.6/CEX3/SCK
P1.1/T2EX/SS
P1.4/CEX1
P1.3CEX0
P3.2/INT0
P3.3/INT1
P3.0/RxD
P3.1/TxD
P1.2/ECI
P3.6/WR
P3.7/RD
P1.0/T2
P3.4/T0
P3.5/T1
XTAL2
XTAL1
AT89C51RB2/RC2
RST
VSS
14
4
10
12
13
1
2
3
5
6
7
8
11
15
16
17
18
19
9
20
PDIL40
33
26
25
24
23
22
40
39
36
34
32
31
30
29
28
27
21
38
37
35
P1.6/CEX3/SCK
P1.7/CEX4/MOSI
P1.5/CEX2/MISO
P0.2/AD2
P0.0/AD0
P0.1/AD1
P0.3/AD3
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
EA
ALE/PROG
PSEN
P2.7/AD15
P2.6/AD14
P2.5/AD13
P2.4/AD12
P2.3/AD11
P2.2/AD10
P2.1/AD9
P2.0/AD8
VCC
NIC*
P3.2/INT0
P3.3/INT1
P3.0/RxD
P3.1/TxD
P3.4/T0
P3.5/T1
RST
4
10
1
2
3
5
6
7
8
11
9
44
12 13
43 42 41 40 39
14
15
VQFP44 1.4
16
17
38 37 36 35 34
18
P1.5/CEX2/MISO
P1.7/CEx4/MOSI
P1.6/CEX3/SCK
19
20
P3.2/INT0
P3.3/INT1
P3.0/RxD
P3.1/TxD
21 22
P3.4/T0
P3.5/T1
NIC*
RST
30
28
27
26
33
32
31
29
25
24
23
14
10
12
13
15
16
17
8
11
7
9
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
EA
NIC*
ALE/PROG
PSEN
P2.7/A15
P2.6/A14
P2.5/A13
18 19
6
5 4 3 2 1
20
21
22
PLCC44
23
24
44 43 42 41 40
25
26
27 28
4180B–8051–04/03
36
34
33
32
39
38
37
35
31
30
29
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
EA
NIC*
ALE/PROG
PSEN
P2.7/A15
P2.6/A14
P2.5/A13