ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 125

• 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

10.6.4
10.7
8331A–AVR–07/11
Address
+0x00
+0x01
+0x02
+0x03
+0x04
+0x05
+0x06
+0x07
Register Summary
BACKUP1: Battery Backup Register 1
BACKUP0
BACKUP1
STATUS
Name
CTRL
BBPWR
Bit 7
• Bit 7:0 – BACKUP0[7:0]: Backup Register 0
This register can be used to store data in the battery backup system before the main power is
lost or removed.
• Bit 7:0 – BACKUP1[7:0]: Battery Backup Register 1
This register can be used to store data in the battery backup system before the main power is
lost or removed.
–
Bit
+0x03
Read/Write
Initial Value
Bit 6
–
–
R/W
7
x
HIGHESR
Bit 5
R/W
–
6
x
R/W
XOSCSEL
5
x
Bit 4
–
BACKUP0[7:0]
BACKUP1[7:0]
R/W
4
x
BACKUP1[7:0]
XOSCRDY
XOSCEN
Bit 3
R/W
3
x
Atmel AVR XMEGA AU
XOSCFDEN
OSCFAIL
Bit 2
R/W
2
x
R/W
BBBODF
ACCEN
1
x
Bit 1
R/W
0
x
BBPODF
RESET
Bit 0
BACKUP1
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