The AT32UC3A1256-AUT is a high-performance, low-power 32-bit AVR RISC-based Microcontroller combines 256kB flash, 64kB SRAM, 10/100 Ethernet MAC, full-speed (12Mbps) USB 2.0 with embedded host capability, I2S and a built-in audio D/A converter. This device features SRAM/SDRAM external bus interface and achieves 91 dhrystone MIPS (DMIPS) at 66MHz while consuming only 40mA at 3.3V. The Peripheral direct memory access (PDCA) controller transfers data between peripherals and memories without processor involvement, drastically reducing processing with continuous large data streams within the MCU. The processor implements a Memory Protection Unit (MPU) and a fast and flexible interrupt controller for supporting modern operating systems and real-time operating systems. Higher computation capabilities are achievable using a rich set of DSP instructions. The PowerManager improves design flexibility and security.
Compact single-cycle RISC instruction set including DSP instruction set
Multi-hierarchy bus system
Internal high-speed flash
Internal high-speed SRAM, single-cycle access at full speed
External memory interface on AT32UC3A0 derivatives
Interrupt controller
Universal serial bus (USB)
Ethernet MAC 10/100Mbps interface
One 3-channel 16-bit Timer/counter (TC)
One 7-channel 16-bit Pulse width modulation controller (PWM)
Four universal synchronous/asynchronous receiver/transmitters (USARTs)
Two master/slave serial peripheral interfaces (SPI) with chip select signals
One synchronous serial protocol controller
One master/slave two-wire interface (TWI), 400kbit/s I2C-compatible
