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Original question:

FPC402: FPC pin Function

FPC402: I2C issue

Dilip Namdeo Mohol
Intellectual 1990 points
Part Number: FPC402

Hi Nasser,

All of the below are very random issues that happen in 500 reloads of board

 

[1] downstream I2c between FPC and port // if this is stuck,  we are not able to reset this i2c

 

[2]  we do not get I2C error (NACK/TO/ERR) in cases where i2c transaction actually failed

 

[3] we had to give extra delays in i2c driver to avoid i2c  transaction failures

 

[4] for us,   i2c direct read did not work for reading,   so we use poller for read

  • 0
    TI__Guru* 93670 points

    Hi Dilip,

    1). We have FPC402 evaluation board. Is there a way you can get this board? Do you see the same issue on this evaluation board as well?

    2). Is it possible to get scope shot of of the whole I2C to port transaction with and without NACK or ACK?

    Since this debug may take some time, please send me internal email so we can get to the bottom of this.

    Regards,, Nasser