ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 148

• Manufacturer Part Number: ATxmega256A3U
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3U

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 50
• Ext Interrupts: 50
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.6 to 3.6
• Operating Voltage (vcc): 1.6 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

13.11 Multi-pin configuration
13.12 Virtual Ports
8331A–AVR–07/11
The multi-pin configuration function is used to configure multiple port pins using a single write
operation to only one of the port pin configuration registers. A mask register decides which port
pin is configured when one port pin register is written, while avoiding several pins being written
the same way during identical write operations.
Virtual port registers allow the port registers to be mapped virtually in the bit-accessible I/O
memory space. When this is done, writing to the virtual port register will be the same as writing
to the real port register. This enables the use of I/O memory-specific instructions, such as bit-
manipulation instructions, on a port register that normally resides in the extended I/O memory
space. There are four virtual ports, and so four ports can be mapped at the same time.
Atmel AVR XMEGA AU
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