ATxmega256A3 Atmel Corporation, ATxmega256A3 Datasheet - Page 42

• Manufacturer Part Number: ATxmega256A3
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3

• 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 Speed: No
• Usb Interface: No
• 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

4.17.24
4.18
4.18.1
4.19
4.20
4.20.1
8077H–AVR–12/09
Register Description – General Purpose I/O Memory
Register Description – External Memory
Register Description – MCU Control
DACBOFFCAL - DACB Offset Calibration Register
GPIORn – General Purpose I/O Register n
DEVID0 - MCU Device ID Register 0
• Bit 7:0 - DACAGAINCAL[7:0] - DACB Gain Calibration Byte
This byte contains the gain calibration value for the Digital to Analog Converter B (DACB). Cali-
bration of the Digital to Analog Converters are done during production test of the device. The
calibration byte is not loaded automatically into the DAC Gain Calibration register, and this must
be done from software.
• Bit 7:0 - DACBOFFCAL[7:0] - DACB Offset Calibration Byte
This byte contains the offset calibration value for the Digital to Analog Converter B (DACB). Cal-
ibration of the Digital to Analog Converters are done during production test of the device. The
calibration byte is not loaded automatically into the DAC Offset Calibration register, and this
must be done from software.
This is a general purpose register that can be used to store data such as global variables in the
bit accessible I/O memory space.
Refer to
The DEVID0, DEVID1 and DEVID2 contains the 3-byte identification that identify each micro-
controller device type. For details on the actual ID refer to the device data sheet.
Bit
+n
Read/Write
Initial Value
Bit
+0x00
Read/Write
Initial Value
Bit
+0x33
Read/Write
Initial Value
”EBI - External Bus Interface” on page
R/W
7
R
0
1/0
7
0
R
7
R
6
0
R/W
1/0
6
0
R
6
R
5
0
R/W
5
0
1/0
R
5
R
4
0
DACBOFFCAL[7:0]
R/W
4
0
1/0
R
GPIORn[7:0]
4
DEVID0[7:0]
268.
R
3
x
R/W
3
0
1/0
R
3
R
2
x
R/W
2
0
1/0
R
2
R
1
x
R/W
1
0
1/0
R
1
XMEGA A
R
0
x
R/W
0
0
1/0
R
0
DACAOFFCAL
GPIORn
DEVID0
42