ATxmega256A3BU Atmel Corporation, ATxmega256A3BU Datasheet - Page 448

• 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

33.12.3.11
33.13 Register Description
33.14 Register Summary
8331A–AVR–07/11
Write Fuse/ Lock Bit
The BUSY flag in the NVM STATUS register will be set until the operation is finished. The CRC
checksum will be available in the NVM DATA register.
The Write Fuse and Write Lock Bit command is used to write the fuses and the lock bits to a
more secure setting.
The BUSY flag in the NVM STATUS register will be set until the command is finished.
For lock bit write the LOCK BIT write command can also be used.
Refer to
the NVM Controller.
Refer to
register description on the PDI.
Refer to
the NVM Controller.
Refer to
1. Load the NVM CMD register with the Write Fuse/ Lock Bit command.
2. Write the selected fuse or Lock Bits by doing a PDI Write operation.
”Register Description - NVM Controller” on page 24
”Register Summary” on page 426
”Register Description - NVM Controller” on page 24
”Register Description – PDI Control and Status Registers” on page 424
for complete register summary on the PDI.
Atmel AVR XMEGA AU
for complete register description on
for complete register summary on
for complete
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