AT89C2051 View Datasheet(PDF) - Unspecified
Part Name
Description
Manufacturer
AT89C2051 Datasheet PDF : 26 Pages
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User Manual V2.00 Evalu8r
Pin Assignments Continued
Pin 8051 Function
1
P1.0
2
P1.1
3
P1.2
4
P1.3
5
P1.4
6
P1.5
7
P1.6
8
P1.7
9
RST
10
P3.0
11
P3.1
12
P3.2
13
P3.3
14
P3.4
15
P3.5
16
P3.6
17
P3.7
18
XTAL2
19
XTAL1
20
GND
21
P2.0
22
P2.1
23
P2.2
24
P2.3
25
P2.4
26
P2.5
27
P2.6
28
P2.7
29
PSEN
30
ALE
31
EA
32
P0.7
33
P0.6
34
P0.5
35
P0.4
36
P0.3
37
P0.2
38
P0.1
39
P0.0
40
Vcc
Reset Pin
RXD
TXD
INT0
INT1
T0
T1
Evalu8r
LED1
LED0
LED2 or A/D Reference
LED3 or A/D Input
LED4
LED5 & SPI
LED6 & SPI
LED7 & SPI
Links 3 & 4/CON8-10
SWITCH 5
SWITCH 4
SWITCH 2
SWITCH 3
SWITCH 1
CON9-10
CON9-2
CON9-3
CON9-4
CON9-5
CON9-6
CON9-7
CON9-8
CON9-9
CON10-4
CON10-3
CON10-2
CON11-9
CON11-8
CON11-7
CON11-6
CON11-5
CON11-4
CON11-3
CON11-2
CON11-1
40-pin microcontrollers
AVR
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
RESET
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
XTAL2
XTAL1
GND
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
OC1B
ALE
ICP
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
Vcc
Figure 39
Function
T0
T1
AIN0
AIN1
SS
MOSI
MISO
SCK
RXD
TXD
INT0
INT1
OC1A
WR
RD
A8
A9
A10
A11
A12
A13
A14
A15
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
17
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