SAM3N Datasheet, Atmel

up to 256 Kbytes of Flash and up to 24 Kbytes of SRAM. The peripheral set includes 2 USARTs, 2 UARTs, 2 TWIs, 3 SPIs, as well as a PWM timer, two 3-channel general-purpos.

The Atmel® | SMART SAM3N series is a member of a family of Flash microcontrollers based on the high performance 32-bit ARM® Cortex®-M3 RISC processor. It operates at a maximum speed of 48 MHz and features up to 256 Kbytes of Flash and up to 24 Kbytes.