GPIO pinout
PIN
Designation
Function
1
NC
No Connect
2
D3
reserved for future functionality
3
D2
reserved for future functionality
4
D1
reserved for future functionality
5
D0
reserved for future functionality
6
NC
No Connect
7
5VDC
+5V DC
8
GND
ground
9
TTL Tally
reserved for future functionality
Parport pinout
PIN
Designation
Function
1
NC
No Connect
2
D3
Data bit 3 ( input )
3
D2
Data bit 2 ( input )
4
D1
Data bit 1 ( input )
5
D0
Data bit 0 ( input )
6
NC
No Connect
7
5VDC
+5V DC
8
GND
ground
9
NC
No Connect