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TCAN4550: what does these register means when tcan4550 could not receive and send data?

Nan Zhang
Intellectual 1895 points
Part Number: TCAN4550


Hi team,

       My customers meet a problem that the device could not read or send data. The register value is h0300 000C whose address is h000C.According to the registers map,the 24th, 25th, 3th and 2nd register are set 1.I read the table 13. Status Field Descriptions, but still could not understand the what kind of error of these registers means.Could you please help me to understand these registers?

 

YOURS 

NAN

  • 0
    TI__Guru 74322 points

    Nan,

    Thanks for bringing this to E2E. Bit 25 indicates that the read FIFO was empty when an attempt was made to access it. Write FIFO overflow means that the write FIFO space had too many commands/writes entered before it was allowed to be sent out. Internal access active just indicates that the internal memory was accessed, and internal error interrupt indicates that an internal interrupt was asserted.

    Can you send over what registers 0x0820 and 0x0824 show as well? These are higher level interrupts that may indicate what else is going here. Just from this register it seems like messages aren't actually being transmitted from the write FIFO, so there are no responses and the read FIFO never receives anything to be read.

    Regards,

    Eric Hackett