AT89C2051 View Datasheet(PDF) - Unspecified
Part Name
Description
Manufacturer
AT89C2051 Datasheet PDF : 26 Pages
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User Manual V2.00 Evalu8r
Device Support
Atmel 20-pin 8051 microcontrollers
Device
Family
AT89C1051 (U)
AT89C2051
AT89C4051
Microcontroller
Socket
U1
U1
U1
Number
Of Pins
20
20
20
RESET Configuration
Polarity Link 3
Link 4
HIGH
1-2
1-2
HIGH
1-2
1-2
HIGH
1-2
1-2
Active
HIGH RESET
Circuit
(Refer to page 12)
Vcc
C6
1
RESET
20
Vcc
Figure 6
RST 1
20
(RXD) P3.0 2
19
P3.1 3
18
XTAL2 4
17
XTAL1 5
16
(INT0) P3.2 6
15
(INT1) P3.3 7
14
(T0) P3.4 8
13
(T1) P3.5 9
12
GND 10
11
ISP
NO
NO
NO
Figure 4
VCC
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1 (AIN1)
P1.0 (AIN0)
P3.7
External
RESET
Signal
AT89CX051
20-Pin
Microcontroller
Pinout for the AT89X051
4
XTAL1
XT1
5
XTAL2
C1
C2
GND
10
P1 (8 I/O)
P3 (7 I/O)
Figure 5
Figure 7
Port I/O Function
P1 8 LED x 8
P3 7 Push Button + Communications
5
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