SPI Read and Write Transactions

As with all SPI communications, transactions start when the -CS line goes LOW and end when the -CS line goes HIGH.

SPI write transaction

SPI read transaction

Address auto-increments

Register address sent in bytes 2 and 3 of every SPI transaction will auto-increment with each data byte send to or received from the FPGA.

This allows you to write or read multiple registers within the span of a single transaction.