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CC3235SF: CC3235SF SSPI question

SANGMIN JEON
Prodigy 170 points
Part Number: CC3235SF

I wonder CC3235SF internal structure for SSPI.

Q1. SSPI connect to MCU or wifi-phy?

Q2. If so, can we control SSPI with source?

  • 0
    Guru 79905 points

    Hi,

    SSPI is a SPI interface dedicated to connecting external SPI flash (sFlash). SPI flash is mandatory for a function of network-coprocessor (NWP). NWP use sFlash for storing own information (configuration, temporary files, etc.). SPI flash is formatted to TI proprietary filesystem. When NWP is enabled (by sl_Start() API), NWP communicate directly with sFlash.

    It may to be possible set pinmux and switch SSPI to application processor (Cortex-M4 core) and control it from user code. But this use case generally not make sense because you can do this only when NWP is disabled. And you cannot write directly into sFlash, because this will corrupt internal filesystem. TI does not support direct access into sFlash from application processor. For saving own data you need to use sl_ filesystem API.

    Jan

  • 0 in reply to Jan D
    Prodigy 170 points

    Thanks for your reply