ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 13

• 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

7.5
7.6
8386A–AVR–07/11
Production Signature Row
User Signature Row
The Production Signature Row is a separate memory section for factory programmed data. It
contains calibration data for functions such as oscillators and analog modules.
The production signature row also contains an ID that identifies each microcontroller device
type, and a serial number that is unique for each manufactured device. The device ID for the
available devices is shown in
LOT number, wafer number, and wafer coordinates for the device.
The production signature row can not be written or erased, but it can be read from both applica-
tion software and external programming.
Table 7-1.
The User Signature Row is a separate memory section that is fully accessible (read and write)
from application software and external programming. It is one flash page in size, and is meant
for static user parameter storage, such as calibration data, custom serial numbers or identifica-
tion numbers, random number seeds etc. This section is not erased by Chip Erase commands
that erase the Flash, and requires a dedicated erase command. This ensures parameter storage
during multiple program/erase session and on-chip debug sessions.
ATxmega128A3U
ATxmega192A3U
ATxmega256A3U
ATxmega64A3U
Device ID bytes for XMEGA A3U devices.
Device
Table 7-1 on page
Byte 2
42
42
44
42
13. The serial number consist of the production
Device ID bytes
Byte 1
96
97
97
98
XMEGA A3U
Byte 0
1E
1E
1E
1E
13