ATxmega256A3BU Atmel Corporation, ATxmega256A3BU Datasheet - Page 45

• Manufacturer Part Number: ATxmega256A3BU
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3BU

• 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: 47
• Ext Interrupts: 49
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 8
• Twi (i2c): 2
• Uart: 6
• 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

4.17.32
4.17.33
4.18
4.18.1
4.19
8331A–AVR–07/11
Register Description – General Purpose I/O Memory
Register Description – External Memory
DACB1OFFCAL – DACB Offset Calibration Register
DACB1GAINCAL – DACB Gain Calibration Register
GPIORn – General Purpose I/O Register n
• Bit 7:0 – DACB1OFFCAL[7:0]: DACB1 Offset Calibration Byte
This byte contains the offset calibration value for channel 1 in the digitaltoanalog converter B
(DACB). Calibration is done during production test of the device. The calibration byte is not
loaded automatically into the DAC channel 1 offset calibration register, so this must be done
from software.
• Bit 7:0 – DACB1GAINCAL[7:0]: DACB1 Gain Calibration Byte
This byte contains the gain calibration value for channel 1 in the digitaltoanalog converter B
(DACB). Calibration is done during production test of the device. The calibration byte is not
loaded automatically into the DAC channel 1 gain calibration register, so this must be done from
software.
These are general purpose register that can be used to store data such as global variables and
flags in the bit-accessible I/O memory space.
Refer to
Bit
+0x37
Read/Write
Initial Value
Bit
+n
Read/Write
Initial Value
Bit
+0x33
Read/Write
Initial Value
”EBI - External Bus Interface” on page
R
7
0
R/W
7
R
0
7
0
R
6
0
R
6
0
R/W
6
0
R
5
0
R
5
0
R/W
5
0
R
4
0
R
4
0
DACB1GAINCAL[7:0]
DACB1OFFCAL[7:0]
R/W
4
0
GPIORn[7:0]
R
3
331.
x
R
3
x
R/W
Atmel AVR XMEGA AU
3
0
R
2
x
R
2
x
R/W
2
0
R
1
x
R
1
x
R/W
1
0
R
0
x
R
0
x
R/W
0
0
DACB1GAINCAL
DACB1OFFCAL
GPIORn
45