ATxmega32A4U Atmel Corporation, ATxmega32A4U Datasheet - Page 374

• Manufacturer Part Number: ATxmega32A4U
• Manufacturer: Atmel Corporation

Specifications of ATxmega32A4U

• Flash (kbytes): 32 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 34
• Ext Interrupts: 34
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 7
• Twi (i2c): 2
• Uart: 5
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 4
• Eeprom (bytes): 1024
• 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: 5
• Output Compare Channels: 16
• Input Capture Channels: 16
• Pwm Channels: 16
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

28.17.2
8331A–AVR–07/11
MUXCTRL – ADC Channel MUX Control registers
See
ADC Channel MUX Control registers” on page
Table 28-10. ADC Gain Factor
• Bit 1:0 – INPUTMODE[1:0]: Channel Input Mode
These bits define the channel mode. Changing input mode will currupt any data in the pipeline.
Table 28-11. Channel Input Modes, CONVMODE=0 (unsigned mode)
Table 28-12. Channel Input Modes, CONVMODE=1 (signed mode)
The MUX register defines the input source for the channel.
• 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.
Bit
+0x01
Read/Write
Initial Value
INPUTMODE[1:0]
INPUTMODE[1:0]
Table 28-8 on page
00
01
10
11
00
01
10
11
R
7
–
0
GAIN[2:0]
Group Configuration
INTERNAL
SINGLEENDED
DIFF
DIFFWGAIN
000
001
010
011
100
101
110
111
INTERNAL
SINGLEENDED
R/W
369. Gain is only valid with certain MUX settings, see
6
0
Group Configuration
R/W
5
0
MUXPOS[3:0]
R/W
4
0
374.
Atmel AVR XMEGA AU
R/W
Description
Internal positive input signal
Single-ended positive input signal
Differential input signal
Differential input signal with gain
Description
Internal positive input signal
Single-ended positive input signal
Reserved
Reserved
3
0
R
2
0
Gain factor
MUXNEG[2:0]
16x
32x
64x
R/W
½x
1x
2x
4x
8x
1
0
R/W
0
0
”MUXCTRL –
MUXCTRL
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