Schematics

1 2
3 4
5 6
(ADC0)PC0)
23
(ADC1)PC1
24
(ADC2)PC2
25
(ADC3)PC3
26
(ADC4)PC4
27
(ADC5)PC5
28
(AIN0)PD6
10
(AIN1)PD7
11
(ICP)PB0
12
(INT0)PD2
32
(INT1)PD3
1
(MISO)PB4
16
(MOSI)PB3
15
(OC1)PB1
13
(RXD)PD0
30
(SCK)PB5
17
(SS)PB2
14
(T0)PD4
2
(T1)PD5
9
(TXD)PD1
31
AGND
21
AREF
20
AVCC
18
GND
5
RESET
29
VCC
4
XTAL1
7
XTAL2
8
GND-HEAT
3
OSCO
2
OSCI
1
INT1
13
VDD
12
VBAT
4
VSS
5
SDA
10
SCL
11
INT2
7
CLKOUT
8
+1*2-
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
21
21
1 2
3 4
5 6
1
2
3
A
B
C
D
E
1 2 3 4 5 6 7 8
A
B
C
D
E
1
2
3
4
5
6
7
8