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What is the recommended implementation of 3-wire SPI on Kinetis K24F with SDK v2.4.0?

Question asked by minibix on Jun 6, 2018
Latest reply on Jun 7, 2018 by Fang Li

I have to integrate a device with 3-wire SPI (CS, SCK and S-IO pins).


I am using the Kinetis K24F chips (specifically, MK24FN1M0VDC12) and MCUX SDK v2.4.0.


What would be the recommended way to implement 3-wire SPI on the hardware and using the SDK?


  • Does the SPI module support bi-directional S-IO pins?
  • Is it acceptable to connect both MCU SIN and SOUT pins to the device's single S-IO pin directly?
  • Does the v2.4.0 SDK support this configuration easily?