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