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Altera_Forum
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15 years ago

SD-SDI 8bit

Hello, SD-SDI megacore supports SD-SDI 10bit mode, however I need 8 bit support. Is it possible to use 8bit mode or it will be impossible to sync the signal? If two LSB bits will be left unconnect...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hm, strange, I wasn't able to start the default simulation as described in the core dir. Well, gonna try on ModelSim SE @ home :)

I wasn't able to make transmitter work. Data feeding seems correct, I can catch 3FF/000/000 signals, but no other possibilities to debug, so stopped for a while until I will generate new ideas :) Maybe SignalTap will help.

Now for the received part, it is a bigger black box at all. Since I am doing SD-SDI on Cyclone II, the soft transceivers are used. I clock the RX core from PLL (inclk 27MHz) with 135MHz, 337.5MHZ and 337.5MHz+90deg as required and feed the SDI_Input with SDI signal, however I get no output signals except rxclk(which is 135MHz) and rx_data_valid, which occours about clk_135MHz/5, nothing more, no parallel data, no other signals. rxrst and en_sync_switch are always tied to '0'. Did I miss something?