Datasheet

MOSI - this is the Master Out Slave In pin, for data sent from your processor to the

FRAM

CS - this is the chip select pin, drop it low to start an SPI transaction. Its an input to the

chip

WP - Write Protect pin. This is used to write protect the status register only! This

pin does not directly affect write protection for the entire chip. Instead, it protects the

block-protect register which is configured however you want (sometimes only half the

FRAM is protected)