The figure ‎below shows the available GX5642 board connectors and jumpers followed by their description:

GX5642 Connectors and Jumpers
Connector/Jumpers |
Description |
J1, J2 |
TTL I/O Connector Channels |
J3, J4 |
Differential I/O Connector Channels |
JP2 |
Installed Jumper sets the board to Independent mode, without jumper the board is in Software Controlled mode. |