Forum Discussion
Altera_Forum
Honored Contributor
14 years ago --- Quote Start --- As we all know, transceivers need some training sequence to synchronize. Like XAUI for 10GE, it will send K28.5 and other signaling codes to ensure the lanes aligned and synchronized. If the transmission mode is not continuous, that is burst mode, high speed CDR will be required in order to recover the packet format. I have no idea whether Altera transceivers have that capability to recover the packet in ns scale, and how to operate on it? Just for open discussion. --- Quote End --- I would still argue that this is not a burst mode :) If you have 'traffic' that has bursts, and the interface uses CDR, then at the physical layer, there is a continuous toggling of bits, otherwise CDR will unlock. But, lets not get into a semantics argument. I don't quite understand what you mean by 'recover a packet in ns scale'. Perhaps you could explain what you are trying to do. I'm currently investigating using the receivers on the high-speed transceiver blocks for receiving data from high-speed ADCs with >5Gsps lane rates for the digitized data. The interface between the ADC and the transceiver is pretty much 'capture the bits', with no option for sending any protocol 'idle' characters and other such luxuries. If your application is similarly non-standard, perhaps I can help. Cheers, Dave