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AVR Microcontroller, High performance, Low Power, AT32 Family AT32UC3B Series Microcontrollers

The AT32UC3B1256-AUT is a 32-bit complete System-On-Chip Microcontroller based on the AVR32 UC RISC processor running at frequencies up to 60MHz. AVR32 UC is a high-performance 32-bit RISC microprocessor core, designed for cost-sensitive embedded applications, with particular emphasis on low power consumption, high code density, and high performance. 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 capability is achieved using a rich set of DSP instructions. The AT32UC3B incorporates on-chip Flash and SRAM memories for secure and fast access. The Peripheral Direct Memory Access controller enables data transfers between peripherals and memories without processor involvement. PDCA drastically reduces processing overhead when transferring continuous and large data streams between modules within the MCU.

  • Compact single-cycle RISC instruction set including DSP instruction set
  • Performing up to 1.39DMIPS/MHz
  • Multilayer bus system - High-performance data transfers on separate buses for increased performance
  • Internal high-speed flash - Single-cycle flash access up to 30MHz
  • Internal high-speed SRAM - Single-cycle access at full speed
  • Interrupt controller - Auto vectored low latency interrupt service with programmable priority
  • System functions - watchdog timer, real-time clock timer
  • Universal serial bus (USB) - Device 2.0 and embedded host low speed and full speed
  • One three-channel 16-bit timer/counter (TC)
  • One 7-channel 20-bit pulse width modulation controller (PWM)
  • Three universal synchronous/asynchronous receiver/transmitters (USART)
  • Serial peripheral interface (SPI) with chip select signals
  • One synchronous serial protocol controller supports I2S and generic frame-based protocols
  • Two-wire interface (TWI), 400kBps I²C-compatible
  • One 8-channel 10-bit analog-to-digital converter, 384ksps
  • 16bit stereo audio bitstream DAC - sample rate up to 50KHz
  • QTouch® library support
  • 5V input tolerant I/Os, including 4 high-drive pins
  • Single 3.3V power supply or dual 1.8 to 3.3V power supply

Technical Doc: AT32UC3B1256-AUT  Datasheet

Additional information

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790 available for 4 – 6 business days delivery


CPU Speed


RoHS Compliant

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Product Range

AT32 Family AT32UC3B Series Microcontrollers

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RoHs Phthalates Compliant


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