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Pin configuration for mibSPI pins

William Stanton
Prodigy 30 points


 

Hello,

The data sheet details how the mibSPI pins can have different drive configurations when set as GPIO.

I wanted to find out the drive configuration when the SPI pins are operating in SPI mode?

Push/pull, pull up , pull down, etc.

The data sheet did not seem to detail the drive when in SPI mode.

Thanks and Best Regards,

Will Stanton

 

 

 

 

  • 0
    TI__Mastermind 49120 points

    Hi Will,

    For this post, I am assuming that you have selected CLK, SIMO, SOMI, CS and ENA as functional SPI signals and not as general-purpose I/O.

    • In Master mode, the CLK, SIMO and CS signals are outputs and controlled by the SPI communication controller (kernel).
    • When in functional output mode, the open drain capability is still available. So the application can configure the outputs to be used in push/pull or open-drain modes.
    • When the open-drain output mode is enabled, the output is enabled only when driving a low, otherwise it is tri-stated.
    • The pull selected is disabled automatically whenever the output is enabled.
    • In effect, if open-drain output mode is selected, the selected pull (via SPIPC7 and SPIPC8 registers) becomes effective when the module is trying to output a '1'.

    Hope this makes the behavior clearer. We will make the necessary updates to the TRM in the next release.

    Regards, Sunil