When the ADV7626 has no power supply is it necessary to add additional circuitry to hold the hot plug detect line low in order to stop a connected computer attempting to read the EDID from the ADV7626? This was necessary on the ADV7611 HDMI receiver.
Sorry, I mean HPA on the receive side - my apologies for the confusion.
Attached is the Analog Devices schematic for the ADV7611 eval board.
On the first page, second block is the circuit that I refer too.
When there is no power on the eval board the MOFSET Q2 holds HPA_A line to ground – this circuit stops an attached computer from attempting to read the internal ADV7611 EDID. If there is no power on the eval board the HPA_A line would be high (via R49, Block 1)) without the MOSFET circuit.
My question is does the ADV7626 require the same MOSFET circuit as it has an internal EDID.
I hope my understanding is correct.