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| Part Number | AT32UC3A1256-AUT | AT32UC3B1256-AUT | AT32UC3A1256-AUR |
|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Active | Active | Active |
| Core Processor | AVR | AVR | AVR |
| Core Size | 32-Bit Single-Core | 32-Bit Single-Core | 32-Bit Single-Core |
| Speed | 66MHz | 60MHz | 66MHz |
| Connectivity | Ethernet, I²C, SPI, SSC, UART/USART, USB OTG | I²C, IrDA, SPI, SSC, UART/USART, USB | Ethernet, I²C, SPI, SSC, UART/USART, USB OTG |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, DMA, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT |
| Number of I/O | 69 | 28 | 69 |
| Program Memory Size | 256KB (256K x 8) | 256KB (256K x 8) | 256KB (256K x 8) |
| Program Memory Type | Flash | Flash | Flash |
| EEPROM Size | - | - | - |
| RAM Size | 64K x 8 | 32K x 8 | 64K x 8 |
| Voltage - Supply (Vcc/Vdd) | 1.65V ~ 3.6V | 1.65V ~ 3.6V | 1.65V ~ 3.6V |
| Data Converters | A/D 8x10b | A/D 6x10b | A/D 8x10b |
| Oscillator Type | Internal | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 100-TQFP | 48-TQFP | 100-TQFP |
| Supplier Device Package | 100-TQFP (14x14) | 48-TQFP (7x7) | 100-TQFP (14x14) |
