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TIC12400: TIC12400QDCPRQ1

SS C
Prodigy 30 points

Part Number: TIC12400

Tool/software:

Hello, 

I am sending two different messages to read two registers using the same Chip Select (CS) line; however, the integrated circuit does not respond to the second message. 


Can you assist me with this issue?

Thank you,
Regards.



  • +1
    TI__Mastermind 35550 points

    Hello SS,

    You can only read or write to a single register in a SPI transaction, you can't read two registers in a single read transaction with this device.  Therefore, your Chip Select signal must transition high after the first register read is complete and then transition low again to start the read transaction for the second register.  There can only be 32 SPI clock cycles per SPI read or write transaction and so the device is ignoring the additional register read you are attempting.

    Reading these two registers in separate SPI read transactions should resolve your issue.

    Regards,

    Jonathan