AT80C51RD2 Atmel Corporation, AT80C51RD2 Datasheet - Page 3

• Manufacturer Part Number: AT80C51RD2
• Manufacturer: Atmel Corporation

Specifications of AT80C51RD2

• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Sram (kbytes): 1.25
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Watchdog: Yes

3. Pin Configurations
4113D–8051–01/09
*NIC: No Internal Connection
P1.5/CEX2
P1.6/CEX3
P1.4/CEX1
P1.1/T2EX
P1.3CEX0
P1.7CEX4
P3.2/INT0
P3.3/INT1
P3.0/RxD
P3.1/TxD
P1.2/ECI
P1.6/CEX3
P1.7/CEX4
P3.6/WR
P1.5/CEX2
P3.7/RD
P1.0/T2
P3.4/T0
P3.5/T1
NIC*
P3.2/INT0
P3.3/INT1
P3.0/RxD
P3.1/TxD
XTAL2
XTAL1
P3.4/T0
P3.5/T1
RST
VSS
RST
14
4
10
12
13
15
16
17
1
2
3
5
6
7
8
11
18
19
9
20
4
10
1
2
3
5
6
7
8
9
11
44
12 13
PDIL40
43 42 41 40 39
14
15
VQFP44 1.4
16
25
24
40
39
36
34
33
30
29
26
23
22
38
37
35
32
31
28
27
21
17
38 37 36 35 34
18
P0.2/AD2
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
P0.0/AD0
P0.1/AD1
P0.3/AD3
VCC
19
20
21 22
26
32
30
28
27
33
31
29
25
24
23
P1.5/CEX2
P1.6/CEX3
P1.7/CEx4
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
P3.2/INT0
P3.3/INT1
P3.0/RxD
P3.1/TxD
P3.4/T0
P3.5/T1
NIC*
RST
14
10
12
13
8
11
15
16
17
7
9
18 19
6
5 4 3 2 1
20
21
22
PLCC44
23
24
44 43 42 41 40
25
26
27 28
AT80C51RD2
32
38
37
36
35
34
33
31
30
29
39
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
3