ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 445

• 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

Notes:
33.12.3.1
8331A–AVR–07/11
CMD[6:0]
Application Section
Boot Loader Section
Calibration and User Signature sections
Fuses and Lock Bits
EEPROM Page Buffer
EEPROM
0x2B
0x2E
0x2F
0x2A
0x2C
0x2D
0x1A
0x4C
0x78
0x20
0x22
0x24
0x25
0x38
0x68
0x39
0x01
0x18
0x02
0x07
0x08
0x33
0x36
0x30
0x32
0x34
0x35
0x06
1. If the EESAVE fuse is programmed, the EEPROM is preserved during chip erase.
Chip Erase
Commands / Operation
Erase Flash Page
Write Flash Page
Erase & Write Flash Page
Flash CRC
Erase Application Section
Erase Application Section Page
Write Application Section Page
Erase & Write Application Section Page
Application Section CRC
Erase Boot Section
Erase Boot Loader Section Page
Write Boot Loader Section Page
Erase & Write Boot Loader Section Page
Boot Loader Section CRC
Read User Signature Row
Erase User Signature Row
Write User Signature Row
Read Calibration Row
Read Fuse
Write Fuse
Write Lock Bits
Load EEPROM Page Buffer
Erase EEPROM Page Buffer
Erase EEPROM
Erase EEPROM Page
Write EEPROM Page
Erase & Write EEPROM Page
Read EEPROM
The Chip Erase command is used to erase the Flash Program Memory, EEPROM and Lock
Bits. Erasing of the EEPROM depends on EESAVE fuse setting, refer to
latile Memory Fuse Byte 5” on page 33
and Fuses are not affected.
for details. The User Signature Row, Calibration Row
Atmel AVR XMEGA AU
PDI Write
Trigger
PDI Write
PDI Write
PDI Write
CMDEX
PDI Write
PDI Write
PDI Write
PDI Write
CMDEX
PDI Write
PDI Write
PDI Write
PDI Write
NVMAA
PDI Read
PDI Write
PDI Write
PDI Read
PDI Read
PDI Write
CMDEX
PDI Write
CMDEX
CMDEX
PDI Write
PDI Write
PDI Read
Change
Protected
”FUSEBYTE5 – Nono-
N
N
N
Y
N
N
N
N
Y
N
N
N
N
Y
N
N
N
N
N
N
Y
N
Y
Y
N
N
N
N
NVM Busy
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
Y
N
N
Y
Y
N
Y
Y
Y
Y
Y
N
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