ATxmega256A3B Atmel Corporation, ATxmega256A3B Datasheet - Page 311

• Manufacturer Part Number: ATxmega256A3B
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3B

• 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 Speed: No
• Usb Interface: No
• 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

8077H–AVR–12/09
• Bit 7 - Reserved
This bit is unused and reserved for future use. For compatibility with future devices, always write
this bit to zero when this register is written.
• Bits 6:3 - MUXPOS[3:0]: MUX selection on Positive ADC input
These bits define the MUX selection for the positive ADC input.
Table 25-12 on page 311
Table 25-11. ADC MUXPOS Configuration when INPUTMODE[1:0] = 00 (Internal) is used
Table 25-12. ADC MUXPOS Configuration when INPUTMODE[1:0] = 01 (Single-ended),
For devices with more then 8 inputs into an ADC multiplexer, the MUXPOS3 bit is used to select
ADC channels 8 (ADC8) and above.
• Bits 2 - Reserved
This bit is unused and reserved for future use. For compatibility with future devices, always write
this bit to zero when this register is written.
• Bits 1:0 - MUXNEG[1:0]: MUX selection on Negative ADC input
These bits define the MUX selection for the negative ADC input when differential measurements
are done. For internal or single-ended measurements, these bits are not in use.
Table 25-13 on page 312 andTable 25-14 on page 312
MUXPOS[2:0]
MUXPOS[2:0]
000
001
010
011
100
101
110
111
000
001
010
011
100
101
110
111
INPUTMODE[1:0] = 10 (Differential) or INPUTPMODE[1:0] = 1 (Differential with
gain) is used.
shows the possible input selection for the different input modes.
Group Configuration
Group Configuration
SCALEDVCC
BANDGAP
TEMP
PIN0
PIN1
PIN2
PIN3
PIN4
PIN5
PIN6
PIN7
DAC
shows the possible input sections.
Temperature Reference.
Bandgap voltage
1/10 scaled V
Table 25-11 on page 311
Analog input
Analog input
DAC output
Reserved
Reserved
Reserved
Reserved
ADC0 pin
ADC1 pin
ADC2 pin
ADC3 pin
ADC4 pin
ADC5 pin
ADC6 pin
ADC7 pin
XMEGA A
CC
and
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