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Flash density of ARM7-based MCUs doubles

Posted: 19 Mar 2007 ?? ?Print Version ?Bookmark and Share

Keywords:flash memory? processor? ARM7? Atmel? MCU?

Atmel Corp. announced 512Kbyte dual-bank flash memory extensions to its AT91SAM7S, SAM7X and SAM7XC MCUs based on the ARM7TDMI processor core.

Doubling the flash memory density from 256Kbytes gives software engineers the capacity to integrate new features for their next-generation products and true in-application programming at an additional cost of less than 20 percent, according to Atmel.

Simultaneous programming
The flash memory on the AT91SAM7S512, SAM7X512 and SAM7XC512 is arranged in two separate banks that allow the device to be programmed simultaneously with application execution.

Atmel also doubled the density of the zero-wait-state, 32bit wide SRAM on its AT91SAM7X512 and SAM7XC512 from 64Kbytes to 128Kbytes.

The devices have 11 to 13 dedicated peripheral DMA channels (PDC) that increase on-chip bandwidth from a maximum of 4Mbps on conventional ARM7 MCUs, to 25Mbps or more. By off-loading peripheral-to-memory transfers from the CPU, the PDC increases the number of CPU operations available to the application.

Atmel's AT91SAM7XC integrates a hardware crypto engine that can be configured to do 128-, 192- or 256bit ("top secret") AES or triple-DES encryption.

Pricing, availability
Pricing for the 512Kbyte flash variants of the SAM7S, SAM7X and SAM7XC devices start at $6 in quantities of 10,000 units.

The AT91SAM7S512 is available in 64-pin LQFP and 64-lead QFN green packages. The AT91SAM7X512 and AT91SAM7XC512 are available in 100-pin LQFP and 100-ball BGA green packages.

- Ismini Scouras

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