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AT32UC3B1256
  • AT32UC3B1256
  • AT32UC3B1256

AT32UC3B1256

In Production

The high-performance, low-power 32-bit AVR RISC-based microcontroller combines 64KB flash memory, 32KB SRAM, full-speed (12 Mbps) USB device, and I2S. The MCU achieves 83 Dhrystone MIPS (DMIPS) at 60MHz and consumes only 23mA at 3.3 volts. The microcontoller's Memory Protection Unit (MPU) and fast, flexible interrupt controller support the latest real-time operating systems. The Peripheral Direct Memory Access (PDMA) controller transfers data between peripherals and memories without processor involvement, drastically reducing processing overhead with large continuous data streams between MCU modules.The power manager improves design flexibility and security: the on-chip brown-out detector monitors the power supply, the CPU is run by the on-chip RC oscillator or one of external oscillator s...

Microchip Technology AT32UC3B1256 Product Info

16 April 2026 0

Parameters

Part Family

AVR B Series

CPU Type

32-bit AVR MCU

MaxSpeed (MHz)

60

Program Memory Size (KB)

256

SRAM (KB)

32

Temp. Range Min.

-40

Temp. Range Max.

85

Operation Voltage Min.(V)

3

Operation Voltage Max.(V)

3.6

SPI

3

I2C

1

UART

2

QSPI

0

Crypto Engine

No

Internal Oscillator

115Khz

Pin Count

48

Description

The high-performance, low-power 32-bit AVR RISC-based microcontroller combines 64KB flash memory, 32KB SRAM, full-speed (12 Mbps) USB device, and I2S. The MCU achieves 83 Dhrystone MIPS (DMIPS) at 60MHz and consumes only 23mA at 3.3 volts.

The microcontoller's Memory Protection Unit (MPU) and fast, flexible interrupt controller support the latest real-time operating systems. The Peripheral Direct Memory Access (PDMA) controller transfers data between peripherals and memories without processor involvement, drastically reducing processing overhead with large continuous data streams between MCU modules.

The power manager improves design flexibility and security: the on-chip brown-out detector monitors the power supply, the CPU is run by the on-chip RC oscillator or one of external oscillator sources, and the Real-Time Clock (RTC) and its associated timer track time.

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