OOPic's 40-pin I/O Connector
All of the OOPic's electrical connections are available at the 40-pin expansion connector.
It provides the following connections.
  • 31 Digital I/O lines
  • Serial Port
  • I2C Network
  • Programming Port
  • Power (regulated & unregulated)
  • 4 Analog-to-digital converters
  • Xtal for Timer functions
  • 2 Pulse width modulators
  • EEPROMs
40 pin male(At the OOPic)
40 pin female(At the cable)

The connector is a 40-pin, .100 inch spacing, connector commonly used on IDE hard drives.
The following table shows the pin assignments for the 40-pin I/O Connector:
PinNameDirFunction PinNameDirFunction
1LSDA-Local I2C Serial Data 2GND---Ground
3LSCLLocal I2C Serial Clock 4Power+6v to +18v Power Supply
5ResetReset (Active Low) 6I/O 15I/O Line 15
I/O Group 1 bit 7
7I/O 1I/O Line 1
A2D 1		 8I/O 14I/O Line 14
I/O Group 1 bit 6
9I/O 2I/O Line 2
A2D 2		 10I/O 13I/O Line 13
I/O Group 1 bit 5
11I/O 3I/O Line 3
A2D 3		 12I/O 12I/O Line 12
I/O Group 1 bit 4
13I/O 4I/O Line 4
A2D 4		 14I/O 11I/O Line 11
I/O Group 1 bit 3
15I/O 5I/O Line 5
 16I/O 10I/O Line 10
I/O Group 1 bit 2
17I/O 6I/O Line 6
 18I/O 9I/O Line 9
I/O Group 1 bit 1
19I/O 7---I/O Line 7
 20I/O 8I/O Line 8
I/O Group 1 bit 0
21+5v+ 5 Volts regulated 22+5v+ 5 Volts regulated
23GNDGND 24GND---GND
25I/O 16I/O Line 16
I/O Group 2 bit 0
Timer 1 Xtal 		 26I/O 31I/O Line 31
I/O Group 3 bit 7
27I/O 17I/O Line 17
I/O Group 2 bit 1
Timer 1 Xtal
PWM-2 		 28I/O 30I/O Line 30
I/O Group 3 bit 6
29I/O 18I/O Line 18
I/O Group 2 bit 2
PWM-1 		 30I/O 29I/O Line 29
I/O Group 3 bit 5
31I/O 19I/O Line 19
I/O Group 2 bit 3
I2C Serial Clock		 32I/O 28I/O Line 28
I/O Group 3 bit 4
33I/O 20I/O Line 20
I/O Group 2 bit 4
I2C Serial Data		 34I/O 27I/O Line 27
I/O Group 3 bit 3
35I/O 21I/O Line 21
I/O Group 2 bit 5		 36I/O 26I/O Line 26
I/O Group 3 bit 2
37I/O 22I/O Line 22
I/O Group 2 bit 6
Serial Transmit		 38I/O 25I/O Line 25
I/O Group 3 bit 1
39I/O 23I/O Line 23
I/O Group 2 bit 7
Serial Receive		 40I/O 24I/O Line 24
I/O Group 3 bit 0