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APPLICATION NOTE
A V A I L A B L E
X25401 256 Bit
AN56
X25401
SPI Serial AUTOSTORE™ NOVRAM
16 x 16 Bit
FEATURES
DESCRIPTION
The Xicor X25401 is a serial 256 bit NOVRAM featuring a static RAM configured 16 x 16, overlaid bit-by-bit with a nonvolatile E2PROM array. The X25401 features a Serial Peripheral Interface (SPI) and software protocol allowing operation on a simple three-wire bus. The bus signals are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a chip select (CS) input, allowing any number of devices to share the same bus. The Xicor NOVRAM design allows data to be transferred between the two memory arrays by means of software commands or external hardware inputs.
X25401 Datasheet
