Hello,
I have hardware setup using the DS90UB933 linked to DS90UB934. I am trying to send generic 1.8V digital inputs to the Din[11:0] signals from DC to 1KHz. I am not using a camera, no Vsync, no Hsync, internal PCLK (10k to 1.8V+ 51k to GND), 12bit HF mode, no FrameSync on Des, all Ser VDD=1.8V, SER & DES SDA/SCL pulled up to 3.3V, Des VDDIO=3.3V. On the deserializer I see a 37.5MHz PCLK output, and LOCK/Pass are good based on 0x4D register reads of 0x13 and subsequent reads of 0x03. I see NO valid outputs on Rout[11:0], as they are all logic low. I have also enabled GPIO 0/1 and sent logic high thru the back channel to Ser GPO 0/1 successfully.
Can you point to any fundamental reason this could be happening? Any way to see if the problem is Ser or Des?
Also, just recently, some of the Des Rout's started outputting ~1.4V and VDDIO=3.3V. They return low when PDB=L, but return to indeterminate state when PDB=H again. Is this a clue to non-functioning output drivers, or a bad link, or damaged chip? Normally when the link is bad, the signals swing from 0 to 3.3V @10MHz, which is more expected since they are in HiZ mode without a link.
Thank you
