XNUT-100 Hardware Manual
6.11 Optional Daughter Board Connector
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Pin
Signal
Function
AVR I/O Pin
1
NC
(not connected)
2
VCC
+5V logic supply voltage
3
NC
(not connected)
4
VCC
+5V logic supply voltage
5
OC0
General purpose I/O
PB4
6
SCL/INT0
I
2
C clock or general purpose I/O with interrupt
PD0
7
SDA/INT1
I
2
C data or general purpose I/O with interrupt
PD1
8
AIN0
General purpose I/O
PE2
9
AIN1
General purpose I/O
PE3
10
GND
Logic supply ground
11
RXD0
Receive data, +5V logic-level
Note: If connected, remove resistor R40!
PE0
12
TXD0
Transmit data, +5V logic-level
PE1
13
GND
Logic supply ground
14
NC
(not connected)
15
NC
(not connected)
16
GND
Logic supply ground
17
NC
(not connected)
18
GND
Logic supply ground
19
T3/INT6
General purpose I/O with interrupt
Note: If connected, remove resistor R39!
PE6
20
NC
(not connected)
96
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