ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 10

• 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

7.3
8386A–AVR–07/11
Flash Program Memory
The Atmel
ory for program storage. The Flash memory can be accessed for read and write both from an
external programmer through the PDI, or from application software running in the device.
All AVR instructions are 16- or 32-bit wide, each Flash address location is 16-bit.
The Flash memory is organized in two main sections, the Application Section and the Boot
Loader section. The size of the different sections are fixed, but device dependent. These two
sections have separate lock bits and can have different levels of protection. The Store Program
Memory (SPM) instruction, used to write to the Flash from the application software, will only
operate when executed from the Boot Loader Section.
The Application Section contains an Application Table Section with separate lock settings. This
enables safe storage of Non-volatile data in the Program Memory.
Figure 7-1.
The Application Table Section and Boot Section can also be used for general application
software.
®
AVR
Flash Program Memory (Hexadecimal address)
1EFFF
1FFFF
20FFF
1F000
20000
®
XMEGA
Word Address
/
/
/
/
/
®
16FFF
17FFF
18FFF
devices contain On-chip In-System Reprogrammable Flash mem-
17000
18000
/
/
/
/
/
10FFF
10000
EFFF
FFFF
F000
/
/
/
/
/
7FFF
77FF
87FF
7800
8000
0
Application Table Section
(256K/192K/128K/64K)
Application Section
(8K/8K/8K/4K)
(8K/8K/8K/4K)
Boot Section
XMEGA A3U
...
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