Microchip AT32UC3B1256-AUT, 32bit AVR Microcontroller, AT32, 60MHz, 256 kB Flash, 48-Pin TQFP

The high-performance, low-power 32-bit AVR RISC-based microcontroller combines 256KB flash memory, 32KB SRAM, full-speed (12MBps) USB Mini-host + device, and I2S. The MCU achieves 83 Dhrystone MIPS (DMIPS) at 60MHz and consumes only 23mA at 3.3 volts.

High Performance, Low Power 32-Bit Atmel ® AVR®Microcontroller
Compact Single-cycle RISC Instruction Set Including DSP Instruction Set
Read-Modify-Write Instructions and Atomic Bit Manipulation
Performing up to 1.39 DMIPS /MHz
Up to 83 DMIPS Running at 60MHz from Flash
Up to 46 DMIPS Running at 30MHz from Flash
MPU