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AM4379: Pin attribute

Part Number: AM4379

Hi team,

The customer wanted to use pr1_edio_data_in/out[7:0]. As the below table listed, 141/150/151/152/196/197 can be configured to both data_in or data_out. But 42/43/246/249 can only be configured in one mode(we can also check section4.2 in datasheet). In that case it cannot conmmunicate with other device. The customer thinks it maybe an error. Please help to explain and provide a solution.

  • Hi,

    For available pr1_edio_data_in/out[7:0] pins please refer to Table 4-50 in the AM437x Datasheet Rev. D. I would also strongly advise that you use the Pinmux tool (www.ti.com/.../PINMUXTOOL ) to configure device pins.
  • Hi,
    Maybe i didn't express clearly. What puzzles the customer is the justification of design that the two pins spi0_d1 and cam1_data6 need to be connected if we want to use signals pr1_edio_data_out0 and pr1_edio_data_in0, while only the pin dss_hsync needs to be connected if we want to use the other two signals pr1_edio_data_out3 and pr1_edio_data_int3. I think he is confused about the communication in hardware instead of configuration in software. It is better to provide a connection diagram of the hardware.
  • Hi Nancy,

    I’m not aware of the AM437x design decision behind this pinmux configuration.  However, please note that on AM437x the PRU firmware cannot change the SoC’s pinmuxing, as the PRU does not have write-access to the Control Module registers. This may have influenced the decision to separate some data_in and data_out signals.

    Regards,

    Melissa