ATxmega256A3 Atmel Corporation, ATxmega256A3 Datasheet - Page 21
ATxmega256A3
Manufacturer Part Number
ATxmega256A3
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega256A3
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 Speed
No
Usb Interface
No
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
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XMEGA A
The Lock bits are used to set protection level on the different flash sections. They are used to
block read and/or write access of the code. Lock bits can be written from en external program-
mer and from the application software to set a more strict protection level, but not to set a less
strict protection level. Chip erase is the only way to erase the lock bits. The lock bits are erased
after the rest of the flash memory is erased.
An unprogrammed fuse or lock bit will have the value one, while a programmed flash or lock bit
will have the value zero.
Both fuses and lock bits are reprogrammable like the Flash Program memory.
21
8077H–AVR–12/09
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