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DS90UB954-Q1EVM: What does the Port RX check box do in the ALP?

Benjamin Roy44
Prodigy 55 points

Part Number: DS90UB954-Q1EVM
Other Parts Discussed in Thread: ALP

Hello,

I am working on a custom system that uses the DS90UB954-EVM in it. We are trying to pass I2C from a local master on the De-Serializer side to the Sensor on the Serializer side (953). Our Master first sets some registers in the 954 and then tries to reach out to the 953 but there is no ACK. Unless I plug in using the ALP and select port 0 in the "Select RX Port" drop down in the registers tab. What does this selection do? Do we need to set another register in the 954 to mimic what the drop down menu does?

Thanks,

Ben Roy

  • 0
    TI__Mastermind 21685 points

    Ben,

    The "Select RX port" drop down configures register FPD3_PORT_SEL (0x4C). For example if 953 is connected to 954 on Port 0, then port 0 registers read/write (bit 4 and bit 0) has to be enabled. Also, check in RX_PORT_CTL (0x0C) register corresponding port is enabled.

    Thanks,
    Vishy