Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Using LVDS

Hello, Could anybody please tell me how I can use the HSTC Connectors to communicate between two DE3 Boards? I tried using bidirectional buffers to send/receive data over the pins, but tha...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

--- Quote Start ---

I tried using bidirectional buffers to send/receive data over the pins, but that doesn't work.

--- Quote End ---

As explained in the DE3 User Manual, the male and female HSTC connectors have crossed LVDS Rx and Tx pins. You can either use fast differential LVDS connections, then you must follow the intended Tx and Rx assignment, or single ended connections with an arbitrary selected data direction. Also bidirectional I/Os are an option. But due to the said Tx/Rx crossing, you don't connect same pin numbers of adjacent boards.