ATxmega256A3BU Atmel Corporation, ATxmega256A3BU Datasheet - Page 131

• 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

11.8
8331B–AVR–06/11
Address
+0x00
+0x01
+0x02
Register Summary
Name
WINCTRL
STATUS
CTRL
• Bit 7:1 – Reserved
These bits are reserved and will always be read as zero. For compatibility with future devices,
always write these bits to zero when this register is written.
• Bit 0 – SYNCBUSY
When writing to the CTRL or WINCTRL registers, the WDT needs to be synchronized to the
other clock domains. During synchronization, the SYNCBUSY bit will be read as one. This bit is
automatically cleared after the synchronization is finished. Synchronization will take place only
when the ENABLE bit for the Watchdog Timer is set.
Bit 7
–
–
–
Bit 6
–
–
–
Bit 5
–
Bit 4
–
WPER[3:0]
PER[3:0]
Bit 3
–
ATMEL CONFIDENTIAL
Atmel AVR XMEGA AU
Bit 2
–
ENABLE
Bit 1
WEN
–
SYNCBUSY
Bit 0
WCEN
CEN
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