AN51234 discusses Serial Peripheral Interface (SPI) and how PSoC® 1 handles SPI communications. After reading this document, you should have an understanding of how SPI works and how it is implemented in PSoC 1.
This application note first explains the basics of SPI and then gives a brief overview of the SPI UMs and their associated APIs. In addition, it explores special SPI considerations, such as SPI modes, multislave systems, 16-bit transfers, and interbyte delay.
PSoC® 1 - Getting Started with SPI