Clocking from the ePC

stroterd · Joined: 08 Mar 2012 Posts: 14

The ePC sends clocks to 4 locations, one of which is XMC1 via J26 A9/B9. In its original state, the X5-TX framework logic does not appear support a DAC clock from the ePC across the P16 connector. Is it possible to use this clock from the ePC via the P16 connector? If so which pins in the UCF file are mapped to the signals at P16 A9/B9?

stroterd · Joined: 08 Mar 2012 Posts: 14

To be more specific, we were interested in using this clock as the DAC sample clock. after taking a closer look at the X5-TX diagrams, it appears the DAC clock is distributed from a chip external to the FPGA and so clocking the DAC from the P16 may nto be possible. Can you confirm?

jhenderson · Posted: Thu Mar 08, 2012 1:47 pm Post subject:

It is not possible to clock the X5-TX from J16. You must route the ePC clock output to the EXT CLK front panel connector of the X5-TX.

stroterd · Joined: 08 Mar 2012 Posts: 14

I had guessed that that was the solution. Thanks for the response!

jhenderson · Posted: Fri Mar 09, 2012 6:06 am Post subject:

Issue closed