Rainbow Electronics AT89C2051 - Manual (Page 5)

Microcontroller
5-51
Figure 1. 8K Virtual Machine
10 F
µ
+5
10K
1N914
RST
AT89C2051
XTAL2
4
1
5
2
3
6
XTAL1
RXD/P3.0
TXD/P3.1
7
8
9
11
10
INT0/P3.2
INT1/P3.3
T0/P3.4
T1/P3.5
P3.7
GND
AIN0/P1.0
12
18
17
16
15
13
14
19
AIN1/P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
V
+5
20
.1 F µ
14.7456 MHz
22 pF
22 pF
1
A0
AT24C64
A1
A2
V
SS
2
3
4
SDA
SCL
NC
V
DD
8
7
6
5
+5
.1 F
µ
4.7K 4.7K
+5
CC