SWRU455M February 2017 – October 2020 CC3120 , CC3120MOD , CC3130 , CC3135 , CC3135MOD , CC3220MOD , CC3220MODA , CC3220R , CC3220S , CC3220SF , CC3230S , CC3230SF , CC3235MODAS , CC3235MODASF , CC3235MODS , CC3235MODSF , CC3235S , CC3235SF
The chapter provides guidelines for SPI configuration at the host side. It should be used by programmers during early integration stages.
The SPI bus is typically comprised of four lines, plus one interrupt line from the device to the host controller:
The CC31XX has two SPI interfaces. One for the auxiliary serial flash device (that bus is labeled FLASH_SPI), and one for the host interface (labeled HOST_SPI). This document only refers to the latter.