ATxmega256A3BU Atmel Corporation, ATxmega256A3BU Datasheet - Page 44

• 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

4.17.29
4.17.30
4.17.31
8331A–AVR–07/11
DACB0GAINCAL – DACB Gain Calibration Register
DACA1OFFCAL – DACA Offset Calibration Register
DACA1GAINCAL – DACA Gain Calibration Register
• Bit 7:0 – DACB0OFFCAL[7:0]: DACB0 Offset Calibration Byte
This byte contains the offset calibration value for channel 0 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 0 offset calibration register, so this must be done
from software.
• Bit 7:0 – DACB0GAINCAL[7:0]: DACB0 Gain Calibration Byte
This byte contains the gain calibration value for channel 0 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 0 gain calibration register, so this must be done from
software.
• Bit 7:0 – DACA1OFFCAL[7:0]: DACA1 Offset Calibration Byte
This byte contains the offset calibration value for channel 1 in the digitaltoanalog converter A
(DACA). 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 – DACA1GAINCAL[7:0]: DACA1 Gain Calibration Byte
This byte contains the gain calibration value for channel 1 in the digitaltoanalog converter A
(DACA). 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.
Bit
+0x33
Read/Write
Initial Value
Bit
+0x34
Read/Write
Initial Value
Bit
+0x36
Read/Write
Initial Value
R
7
0
R
7
0
7
R
0
R
6
0
R
6
0
R
6
0
R
5
0
5
R
0
R
5
0
R
4
0
R
4
0
R
4
0
DACB0GAINCAL[7:0]
DACA1GAINCAL[7:0]
DACA1OFFCAL[7:0]
R
3
x
R
3
x
R
3
x
Atmel AVR XMEGA AU
R
2
x
2
R
x
R
2
x
R
1
x
R
1
x
R
1
x
R
0
x
R
0
x
R
0
x
DACB0GAINCAL
DACA1GAINCAL
DACA1OFFCAL
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