SPI Protocol Slave Select Assertion Modes - 3.2 English

PG153 AXI Quad SPI Product Guide

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3.2 English

The standard mode SPI protocol is designed to have automatic slave select assertion and manual slave select assertion which are described in these sections. All the SPI transfer formats described in the Clocking (SPI Clock Phase and Polarity Control) section are valid for both automatic and manual slave select assertion mode.