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Processors/DSPs  

Microprocessor uses only 80mW in full power

Posted: 19 May 2008     Print Version  Bookmark and Share

Keywords:microprocessor  full-power mode 

Atmel Corp. has come up with its 400MHz AT91SAM9G20 ARM926EJ-S based embedded microprocessor, which consumes only 80mW in full-power mode even with all the peripherals on.

The AT91SAM9G20, pin-compatible with the 200MHz AT91SAM9260, features an improved error correction for external NAND flash, and offers four times the cache and on-chip SRAM, as well as an enlarged Ethernet FIFO for latency improvement. The product is for power-constrained applications that need high performance including POS terminals, building automation, security cameras and bar code readers.

The AT91SAM9G20 offers the industry's widest choice of operating systems, with support for Microsoft Windows CE, .NET MF and Linux, as well as a number of RTOS and middleware products from industry-leading third parties including Adeneo, IAR, Keil, Mentor Graphics, Micrium, Segger and TimeSys.

Smart functions
The AT91SAM9G20 fully exploits Atmel's peripheral DMA and distributed memory architecture that, together with the 6-layer bus matrix, enables multiple simultaneous data transfers between memories, peripherals and external interfaces without consuming CPU clock cycles. The external bus interface (EBI) is clocked at 133MHz for high-speed transfers to off-chip memories. This architecture gives the device the high internal and external data bandwidth required by many embedded networked applications.

Networking and communications requirements are met by 12Mbps USB Full Speed Dual Host and Device ports, an Ethernet 10/100 Base T MAC, four USARTs, SPI, SSC and Two-Wire Interface (TWI). The image sensing requirements of many of the target applications for the AT91SAM9G20 are met by a fully integrated Image Sensor Interface (ISI).

In addition to cutting the power consumption in full-speed operating mode (where the clock frequency is software programmable) in half, the AT91SAM9G20 features four reduced-power modes, including Backup Mode where the main power supply is off and the device power consumption is sufficiently low (9µW) for an extended period of operation under battery supply.

The AT91SAM9G20 is sampling now, packaged in a 217-ball LFBGA RoHS-compliant package. Pricing is Rs.280.15 ($ 7) in quantities of 10,000. The AT91SAM9260 will continue to be supplied and fully supported as long as demand continues.





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