PC/104 Connector 

Minimum input Power Requirements at the PC/104 Connector: +5V at 250mA. 

Power Available at J7 

J7.1: +5V at 200mA (+5V at 450mA at the PC/104 connector). 

J7.15: -5V at 25mA 

The +5V at J7 pin 1 is tied directly to the PC/104 +5V supply line. 

The -5V at J7 pin 15 is derived from the on-board DC-DC converter and on-board regulator. 

Recommend that the -5V be returned via one of the AGND pins at J7. 

Recommend that the +5V be returned via the DGND for larger currents. If +5V is going to drive a small analog load (<50mA) then it is OK to return via AGND pins at J7.