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| Part Number | ATXMEGA256A3U-AU |
| Datasheet | ATXMEGA256A3U-AU datasheet |
| Description | IC MCU 16BIT 256KB FLASH 64TQFP |
| Manufacturer | Microchip Technology |
| Series | AVR® XMEGA® A3U |
| Part Status | Active |
| Core Processor | AVR |
| Core Size | 8/16-Bit |
| Speed | 32MHz |
| Connectivity | I²C, IrDA, SPI, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Number of I/O | 50 |
| Program Memory Size | 256KB (128K x 16) |
| Program Memory Type | FLASH |
| EEPROM Size | 4K x 8 |
| RAM Size | 16K x 8 |
| Voltage - Supply (Vcc/Vdd) | 1.6V ~ 3.6V |
| Data Converters | A/D 16x12b; D/A 2x12b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | Surface Mount |
| Supplier Device Package | 64-TQFP |
| Base Part Number | 64-TQFP (14x14) |