AN-1083 SPI Parallel to Serial Converter

The Serial-Parallel Interface (SPI) bus is a synchronous serial communication interface specification made popular by Motorola before it spun off to Freescale and then acquired by NXP. Typical applications include SDIO and LCD. GreenPAK4 includes a SPI slave macro-cell. The purpose of this application note is to demonstrate the SPI macro-cell’s parallel to serial (P2S) mode configuration. AN-1065 covers serial to parallel (S2P) mode configuration. Specific to GreenPAK4, P2S applications include converting ADC or FSM counter data into standard SPI serial data for system-level communication. Please note the SPI macro-cell cannot send and receive serial data in the same application; it is set up either in S2P or P2S mode.

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