AT45DB321D-SU Datasheet PDF - Adesto Technologies

The AT45DB321D is a 2.5V or 2.7V, serial interface, sequential access flash memory ideally suited for a wide variety of digital voice-, image-, program code-, and data-storage applications. The AT45DB321D supports the RapidS serial interface for applications requiring very high speed operations. The RapidS serial interface is SPI compatible for frequencies up to 66MHz. The 34,603,008-bits of memory are organized as 8,192 pages of 512 bytes or 528 bytes each. In addition to the main memory, the AT45DB321D also contains two SRAM buffers of 512/528 bytes each. These buffers allow the receiving of data while a page in the main memory is being reprogrammed, as well as the writing of a continuous data stream. EEPROM (electrically erasable and programmable read-only memory) emulation (bit or byte alterability) is easily handled with a self-contained, three-step read-modify-write operation.

● 66MHz maximum clock frequency

● User configurable page size

● Page program operation

● Flexible erase options

● Two SRAM data buffers (512/528 bytes)

● Continuous read capability through entire array

● Low power dissipation

● Hardware and software data protection features

● Sector lockdown for secure code and data storage

● Security: 128 byte security register

● 100,000 program/erase cycles per page min.

● Data retention: 20 years