Datasheet

Pinouts

The FRAM chip is the little guy in the middle. On the bottom we have the power and interface

pins

(http://adafru.it/dui)Power Pins:

VCC - this is the power pin. Since the chip uses 3-5VDC you should pick whatever the

logic voltage you're using. For most Arduino's that's 5V.

GND - common ground for power and logic

SPI Logic pins:

All pins are 3-5V compliant and use whatever logic level is on VCC

HOLD - this is a 'wait' pin for the SPI bus. When pulled low, it puts the SPI bus on hold.

This is different than the CS pin because it doesnt stop the current transaction. Its

good if you want to talk to other SPI devices and stream data back and forth without

stopping and starting transactions.

SCK - This is the SPI clock pin, its an input to the chip

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

processor