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LAUNCHXL-CC26X2R1: External flash

Shyam Shankar79
Expert 2330 points
Part Number: LAUNCHXL-CC26X2R1
Other Parts Discussed in Thread: CC2652R

Hello,

I am using the cc26x2r1 launchapad along with the external flash. Now I have connected the similar flash chip externally, but I am not even able to read the Manufacture ID. Could you tell me how to troubleshoot this issue? I tried with a logic analyzer and I can see the data going out through MOSI line, but the MISO always shows 0. The CLK too is appearing well.

Regards,

Shyam

  • 0
    TI__Guru** 106705 points
    Hi Shyam,

    Since the MISO line is low the flash is obviously not responding. You should thus figure out if the data being sent from the CC2652R is in fact what the flash expects, and also if all the required external signals on the flash is connected properly.

    Regards,
    Fredrik
  • 0 in reply to Fredrik K
    Expert 2330 points

    Hi Fredrik,
    I am using the same external flash as used by the nvsextrenal example for the cc26x2r1 launchpad. And the external signals too - Write protect, rst, cs pin all seem to be proper. I tried it the manufacture id read with the external flash present on the launchpad board by modifying the nvsexternal example and it seems to work fine. But when I try it with an externally connected flash on  my custom PCB using the cc2652r1 chip, it seems to be not working. Would you suggest that the issue might be with the external pins again?

    Regards,
    Shyam