Atmel AVR XMEGA D Series, Manual, Page: 266 / 331

266
8210C–AVR–09/11
Atmel AVR XMEGA D
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 21-12 on page 266 and Table 21-13 on page 266 show the possible input sections.
0111 PIN7 ADC7 pin
1000 PIN8 ADC8 pin
1001 PIN9 ADC9 pin
1010 PIN10 ADC10 pin
1011 PIN11 ADC11 pin
1100 PIN12 ADC12 pin
1101 PIN13 ADC13 pin
1110 PIN14 ADC14 pin
1111 PIN15 ADC15 pin
Table 21-12. ADC MUXNEG configuration, INPUTMODE[1:0] = 10, differential without gain.
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
Table 21-13. ADC MUXNEG configuration, INPUTMODE[1:0] = 11, differential with gain
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
Table 21-11. ADC MUXPOS configuration when INPUTMODE[1:0] = 01 (single-ended),
INPUTMODE[1:0] = 10 (differential) or INPUTPMODE[1:0] = 1 (differential with
gain) is used.