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DS90UB948-Q1: MODE_SEL0 strapping bug

Charlotte Allhammar
Prodigy 40 points
Part Number: DS90UB948-Q1

We got 1.241V (VDD33) on MODE_SEL0 pin and do read out MODE_SEL register to 0xBC wich will give us MODE_SEL0 = 100: Dual OLDI output (#5 on MODE_SEL0).

However the picture is totally off color wise and to make it perfect I have to write register FPD_TX_MODE to 0xC0. -> over write strap and select dual OLDI output.

What voltage should we have on the strap to make it good at default?

  • 0
    TI__Guru** 103215 points

    Hello Charlotte,

    With the pin strapping you are setting:

    - Dual SWAP output

    - MAPSEL = 1

    But when you write 0xC0 to FPD_TX_MODE you are setting:

    - Dual output (not SWAP)

    - MAPSEL = 0

    So please try changing the pin strapping to GND instead of 1.241V and see if that solves the problem. 

    Best Regards,

    Casey