Posted by Michael Posner on May 7th, 2013
Last week I discussed the occurrences of the cloak of invisibility in respect to my black truck and trailer as well as HAPS. Well fate was unhappy with me exposing the truth about the existence of the cloak of invisibility and sent me a message
Yes, last week someone drove into my car hauling fully enclosed trailer. Ouch. No one was injured but I was spooked by what the other drive said when I asked what happened, their response
I didn’t see you
Come on now, it’s a 25 foot long fully enclosed trailer that blocks out the sun. Maybe that’s the issue, maybe it’s really a black hole in disguise and the other driver was sucked into it !!!!
Last week I was asked if the Xilinx transceivers, the high speed serdes capable pins, were available on the HAPS-70. The answer is yes, we make 16 lanes of the transceivers available per FPGA across two multi-gigabit (MGB) connectors. The MGB is a generic connector meaning that the user of the HAPS system can either use an off-the-shelf MGB daughter board from Synopsys or build a custom MGB style daughter board to access the transceivers. Synopsys provides off-the-shelf MGB daughter boards for PCI E, SATA and Ethernet. The transceivers support a wide range of different protocols.
Here is an example of the Synopsys PCI MGB daughter board
Here is an example of the MGB access riser. A user would build a MGB daughter board to either plug into this of bypass it and go straight into the MGB connector itself.
Different from the previous “T” Xilinx FPGA variants the Virtex-7 2000T’s speed grade changes the max speed of the transceivers. The -1 part supports up to 6.6 Gb/s while the -2 part supports up to 10.3125 Gb/s. Does anyone know why it’s 10.3125 Gb/s? I do but if you know the answer make a comment below and I’ll ensure you are written up as a star in my next blog.