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2 Description

The

P25Q40U/20U/10U/05U is a serial interface Flash memory device designed for use in a wide variety of

high volume consumer based applications in which program code is shadowed from Flash memory into

embedded or external RAM for execution. The flexible erase architecture of the device, with its page erase

granularity it is ideal for data storage as well, eliminating the need for additional data storage devices.

The erase block sizes of the device have been optimized to meet the needs of today's code and data s

torage

applications. By optimizing the size of the erase blocks, the memory space can be used much more efficiently.

Because certain code modules and data storage segments must reside by themselves in their own erase

regions, the wasted and unused memory s pace that occurs with large sectored and large block erase Flash

memory devices can be greatly reduced. This increased memory space efficiency allows additional code

routines and data storage segments to be added while still maintaining the same overall de vice density.

The device also contains an additional 3*512

byte security registers with OTP lock (One Time

Programmable), can be used for purposes such as unique device serialization, system level Electronic Serial

Number (ESN) storage, locked key storage , etc.

Specifically designed for use in many different systems, the device supports read, program, and erase

operations with a wide supply voltage range of 1.65V to 3.6V. No separate voltage is required for

programming and erasing.