Hi, Sameed, I think the only existing yellow blocks that use the MGTs are the 10 GbE block and the XAUI block. If you have other high speed serial data that you want to interface with the CASPER toolflow, you'll need to dive into the depths of building your own yellow block.
Hope this helps, Dave On Apr 25, 2013, at 2:48 PM, Sameed H wrote: > Hi Jason, > > Thanks for the info. In any case to use the higher speed connectors, are > there any yellow blocks already included? I guess to supply the high speed > connector with data I need to implement a FIFO. Is that right? > > Thanks, > Sameed > > > On Thu, Apr 25, 2013 at 10:50 AM, Jason Manley <jman...@ska.ac.za> wrote: > > 1. As far as I understand, the ZDOK connectors interface with the RocketIO > > transceivers on the Virtex 5 FPGA. Is that right? > > No, they interface to conventional GPIO pins. > > > 2. The RocketIO transceivers can reach much higher frequencies than the > > FPGA's core clock rate. But the yellow blocks in the Casper toolset clock > > the ZDOKs at the FPGA core clock rate only. So how should I proceed for > > going to higher clock rates? I can provide an external clock through one of > > the ZDOK connections in my application. > > For higher clock rates (RocketIO/MGT) with custom HW, you need to use > ROACH2's mezzanine connector. All of ROACH1's MGTs are routed to CX4 ports on > the rear panel. > > Jason >
