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LAUNCHXL-CC1310: What is the difference of CS pin labelled CS and CSN? (SPI)

JEnginnerHW
Prodigy 120 points
Part Number: LAUNCHXL-CC1310
Other Parts Discussed in Thread: CC1310

Tool/software:

Hi I am working with an external flash memory and I am following the default configuration for interfacing with CC1310, and I have noticed that there are two CS pins labelled as follows.

#define CC1310_LAUNCHXL_SPI_FLASH_CS        IOID_20

#define CC1310_LAUNCHXL_SPI0_CSN                 IOID_11

What is the difference?


I have noticed that CSN does not allow me to control the timing in low and high state as it seems it is not possible to configure it.

Regards.

  • 0
    TI__Guru* 77611 points

    Hi,

    I believe CC1310_LAUNCHXL_SPI_FLASH_CS is the CS pin for the external flash, while CC1310_LAUNCHXL_SPI0_CSN is the CS pin for the SPI which can be used for anything, e.g. communicate with a sensor on a booster pack. 

    Cheers,

    Marie H