ATxmega128B1 Atmel Corporation, ATxmega128B1 Datasheet - Page 329

• Manufacturer Part Number: ATxmega128B1
• Manufacturer: Atmel Corporation

Specifications of ATxmega128B1

• Flash (kbytes): 128 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 53
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Segment Lcd: 160
• 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
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 8
• Eeprom (bytes): 2048
• 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: 3
• Output Compare Channels: 10
• Input Capture Channels: 10
• Pwm Channels: 10
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

25.7
8291A–AVR–10/11
Compare Function
Figure 25-9. Signed differential input (with gain), input range, and result representation.
Figure 25-10. Signed single-ended and internal input, input range, and result representation.
Figure 25-11. Unsigned single-ended and internal input, input range, and result representation.
The ADC has a built-in 12-bit compare function. The ADC compare register can hold a 12-bit
value that represents a threshold voltage. The ADC channel can be configured to automatically
compare its result with this compare value to give an interrupt or event only when the result is
above or below the threshold.
VREF
VREF
-VREF
-VREF
GAIN
VREF
GAIN
0 V
0 V
GND
−
Δ
V
VINN
VINN = GND
=
VREF
2
VINP
VINN
RES
VINP
VINP
−
Δ
V
4095
4094
4093
-2045
-2046
-2047
-2048
-2045
-2046
-2047
-2048
Dec
2047
2046
2045
203
202
201
200
2047
2046
2045
Dec
Dec
...
...
0
...
-1
-2
...
...
-1
-2
...
3
2
1
0
3
2
1
0
Hex
FFF
FFE
FFD
0CB
0CA
0C9
0C8
7FD
FFE
Hex
7FE
7FD
FFF
FFE
Hex
7FF
7FE
FFF
7FF
803
802
801
800
803
802
801
800
...
Atmel AVR XMEGA B
0
...
...
...
...
3
2
1
0
3
2
1
0
1111 1111 1111
1111 1111 1110
1111 1111 1101
0000 1100 1011
0000 1100 1010
0000 1100 1001
0000 1100 1000
0000 0000 0000
0111 1111 1111
0111 1111 1110
0111 1111 1101
0000 0000 0011
0000 0000 0010
0000 0000 0001
0000 0000 0000
1111 1111 1111
1111 1111 1110
1000 0000 0011
1000 0000 0010
1000 0000 0001
1000 0000 0000
0111 1111 1111
0111 1111 1110
0111 1111 1101
0000 0000 0011
0000 0000 0010
0000 0000 0001
0000 0000 0000
1111 1111 1111
1111 1111 1110
1000 0000 0011
1000 0000 0010
1000 0000 0001
1000 0000 0000
Binary
Binary
Binary
...
...
...
...
...
0000 1111 1111 1111
0000 1111 1111 1110
0000 1111 1111 1101
0000 0000 1100 1011
0000 0000 1100 1010
0000 0000 1100 1001
0000 0000 1100 1000
0000 0000 0000 0000
16-bit result register
0000 0111 1111 1111
0000 0111 1111 1110
0000 0111 1111 1101
0000 0000 0000 0011
0000 0000 0000 0010
0000 0000 0000 0001
0000 0000 0000 0000
1111 1111 1111 1111
1111 1111 1111 1110
1111 1000 0000 0011
1111 1000 0000 0010
1111 1000 0000 0001
1111 1000 0000 0000
16-bit result register
0000 0111 1111 1111
0000 0111 1111 1110
0000 0111 1111 1101
0000 0000 0000 0011
0000 0000 0000 0010
0000 0000 0000 0001
0000 0000 0000 0000
1111 1111 1111 1111
1111 1111 1111 1110
1111 1000 0000 0011
1111 1000 0000 0010
1111 1000 0000 0001
1111 1000 0000 0000
16-bit result register
...
...
...
...
...
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