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DS90UH927QEVM: DS90UH927Q EVN board can not Pair with DS90UB928Q

Part Number: DS90UH927QEVM

Dear TI team.

I had a trouble about 927 EVM board pair with 928 board which is designed by ourselves and only testing 928 board is no problem and can normal work.

the following is platform setting up:

1. 927 EVM board with power Vin =5V,

2. 927 EVM board pair with 928 board by FPD -link cable. (928 board with other power supplier.).

3. there is no LVDS image signals to input to 927 EVM board interface.

4. We use a MCU I2C channel to connect 972 EVM board's I2C channel.

5. we can use MCU to read/write 927 registers and we read 927 register address = 0x06, but the address content = 00H, which means 928 did not be paired with 927, am I right?

So I have 3 questions and need TI to share comments.

Q1: based on the set-up above description, can 927 EVM board pair with 928 board? If the answer is no, could you share detail information?

Q2: If there is no LVDS signals to input to 927, can 972 & 928 be paired with ?

Looking forward to your feedback.

Thanks a lot.