ATxmega256A3BU Atmel Corporation, ATxmega256A3BU Datasheet - Page 313

• Manufacturer Part Number: ATxmega256A3BU
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3BU

• 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: 47
• Ext Interrupts: 49
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 8
• Twi (i2c): 2
• Uart: 6
• 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

24.2.1
8331A–AVR–07/11
Event System Filtering
For transmission, three pulse modulation schemes are available:
For reception, a fixed programmable minimum high-level pulse width for the pulse to be decoded
as a logical 0 is used. Shorter pulses will then be discarded, and the bit will be decoded to logical
1 as if no pulse was received.
The module can only be used in combination with one USART at a time. Thus, IRCOM mode
must not be set for more than one USART at a time. This must be ensured in the user software.
The event system can be used as the receiver input. This enables IRCOM or USART input from
I/O pins or sources other than the corresponding RX pin. If event system input is enabled, input
from the USART's RX pin is automatically disabled. The event system has a digital input filter
(DIF) on the event channels that can be used for filtering. Refer to
for details on using the event system.
• 3/16 of the baud rate period
• Fixed programmable pulse time based on the peripheral clock frequency
• Pulse modulation disabled
Atmel AVR XMEGA AU
”Event System” on page
313
69”