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
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