Datasheet

345
XMEGA B [DATASHEET]
8291B–AVR–01/2013
Depending on the device pin count and feature configuration, the actual number of analog input pins may be less than
16. Refer to the device datasheet and pin-out description for details.
 Bit 2:0 – MUXNEG[2:0]: 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 used.
Table 26-13 and Table 26-14 show the possible input sections.
Table 26-13. ADC MUXNEG configuration, INPUTMODE[1:0] = 10, differential without gain.
Table 26-14. ADC MUXNEG configuration, INPUTMODE[1:0] = 11, differential with gain.
0011 PIN3 ADC3 pin
0100 PIN4 ADC4 pin
0101 PIN5 ADC5 pin
0110 PIN6 ADC6 pin
0111 PIN7 ADC7 pin
1XXX – Reserved
MUXNEG[2:0] Group Configuration Analog Input
000 PIN0 ADC0 pin
001 PIN1 ADC1 pin
010 PIN2 ADC2 pin
011 PIN3 ADC3 pin
100 – Reserved
101 GND PAD ground
110 – Reserved
111 INTGND Internal ground
MUXNEG[2:0] Group Configuration Analog Input
000 PIN4 ADC4 pin
001 PIN5 ADC5 pin
010 PIN6 ADC6 pin
011 PIN7 ADC7 pin
100 INTGND Internal ground
101 – Reserved
110 – Reserved
111 GND PAD ground
MUXPOS[3:0] Group Configuration Description