Atmel is offering the SAM3S series of 18 general-purpose Cortex-M3 based flash microcontrollers.

At 1 MHz operation power consumption is 2.3mW. At maximum operating frequency of 64MHz the device consumes 1.45mW/MHz.
Intended for applications including metering, medical and wireless networking, the MCUs feature system control, sensor interfaces, 64k to 256kbyte flash memory options, an optional external parallel bus interface, connectivity capabilities and user interface support.

There is also On-Die Termination (ODT) where termination resistors are integrated inside the chip instead of on a printed circuit board. The SAM3S has integrated series resistors on the outputs with a typical value of 35ohms, which result in a reduced BOM cost, real estate savings and facilitate PCB design.

There are also USB device, SDIO, 12-bit ADC and DAC, 4 UARTs, dual I2C, I2S, timers and a chip ID feature.

The SAM3S’s supply voltage ranges from 1.62 to 3.6V operation and package options from 48-pin QFP and QFN up to 100-pin QFP and BGA.

For more information, see http://www.atmel.com