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Output pixel routing when assigned pins exceed bit depth

Question asked by BrianE Employee on Jun 16, 2015
Latest reply on Jun 29, 2015 by GuenterL

Hello,

  In ADV7612 or other receivers, if the OP_FORMAT_SEL register allocates more pixels than the incoming bit depth - e.g. say OP_FORMAT_SEL = 0x42, to assign all 12 bits of each color component to a pin, and say the incoming bit depth is only 8 or 10 bits - will the output pixel ports follow their labeling per the OP_FORMAT_SEL table (page 199 in ADV7612 UG, rev. C), which would mean the LSB stays put and the MSBs will drop off; or will the MSB stay put, which would mean that, effectively, all that changing OP_FORMAT_SEL to match the reduced bit depth would do is float the pins that don't apply, and if that's the case, is there any reason why we should encourage a user to make the change to OP_FORMAT_SEL rather than just leave it set to maximum bit depth?

Thanks,

Brian

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