ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 42

• 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

4.17.22
4.17.23
4.17.24
8331A–AVR–07/11
ADCBCAL0 – ADCB Calibration Register 0
ADCBCAL1 – ADCB Calibration Register 1
TEMPSENSE0 – Temperature Sensor Calibration Register 0
• Bit 7:0 – ADCACAL1[7:0]: ADCA Calibration Byte 1
This byte contains byte 1 of the ADCA calibration data, and must be loaded into the ADCA
CALH register.
ADCBCAL0 and ADCBCAL1 contains the calibration value for the analogtodigital converter
B(ADCB). Calibration is done during production test of the device. The calibration bytes are not
loaded automatically into the ADC calibration registers, so this must be done from software.
• Bit 7:0 – ADCBCAL0[7:0]: ADCB Calibration Byte 0
This byte contains byte 0 of the ADCB calibration data, and must be loaded into the ADCB CALL
register.
• Bit 7:0 – ADCBCAL0[7:0]: ADCB Calibration Byte 1
This byte contains byte 1 of the ADCB calibration data, and must be loaded into the ADCB
CALH register.
TEMPSENSE0 and TEMPSENSE1 contain the 12-bit ADCA value from a temperature measure-
ment done with the internal temperature sensor. The measurement is done in production test at
85°C and can be used for single- or multi-point temperature sensor calibration.
• Bit 7:0 – TEMPSENSE0[7:0]: Temperature Sensor Calibration Byte 0
This byte contains the byte 0 of the temperature measurement.
Bit
+0x24
Read/Write
Initial Value
Bit
+0x25
Read/Write
Initial Value
Bit
+0x2E
Read/Write
Initial Value
7
R
x
R
R
7
x
7
x
R
6
x
R
R
6
x
6
x
R
5
x
R
R
5
5
x
x
R
4
x
4
R
4
R
x
x
TEMPSENSE0[7:0]
ADCBCAL0[7:0]
ADCBCAL1[7:0]
R
3
x
R
R
3
x
3
x
Atmel AVR XMEGA AU
R
2
x
R
R
2
2
x
x
R
1
x
R
R
1
1
x
x
R
0
x
0
R
0
R
x
x
TEMPSENSE0
ADCBCAL0
ADCBCAL1
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