DataFlash®

DataFlash® is the world's number one selling serial interface flash family.

Introduced in 1997, Atmel's Dataflash families (45 series and the recently introduced 26 series) are feature rich, low pin count, sequential access families ideal for program code, data storage, Serial EEPROM replacement, and the next generation PC Bios Market.

Simple SPI Interface, Robust Architecture

DataFlash employs proven NOR technology (100% good bits), a robust architecture featuring on-board SRAM buffers (45 series), small pages and flexible op codes. Small pages facilitate easier changes to the chip's contents with less power consumption and eliminate the large external RAM buffers required by large sectored flash.

The simple SPI interface greatly reduces system pin counts, power consumption and switching noise. System design is greatly simplified with DataFlash, as all densities 1 Mbit to 128 Mbits (45 series), and 4 Mbit to 32M bit (26 series) require only 4 pins to connect to the system processor, controller or DSP. This also allows for an easy migration path between densities with no board changes. DataFlash is offered in several footprint-compatible packages including SOIC/CASON, TSOP, MLF and CBGA.

World's Fastest Serial Flash

For frequencies greater than 33 MHz, Atmel has pioneered the RapidS™ serial interface on its 45 series products. RapidS is a natural extension of SPI and allows bus frequencies of 50 Mhz and beyond. For applications requiring even faster read throughput, Atmel has introduced Rapid8™, an 8-bit sequential access interface on the high-density 45 series DataFlash products. The Rapid8 interface is offered on the 64 Mbit and 128 Mbit 45 series devices. These two devices can operate with the RapidS/SPI interface, the Rapid8 interface or both.

A Better Way

System designers have adopted DataFlash as the sole nonvolatile memory block in their system, replacing up to three memories to hold program code, user data and ID, calibration, or parametric data. DataFlash increases reliability and dramatically reduces total system costs, size, switching noise and manufacturing complexity.