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The data structure for the SPI communications to the CP2400 and CP2402 devices is shown on this page. The first byte transmitted from the master node is the command and can be one of the 6 illustrated on the previous slide. The next two bytes make up the address starting with the high byte and then the low byte followed by the data bytes. The read sequence also adds a wait byte that allows time to load the shift register with the requested data.
PTM Published on: 2011-05-13
India