ATA8743_14 Datasheet, PDF (150/215 Pages) ATMEL Corporation – Microcontroller with UHF ASK/FSK Transmitter

• Bits 5:0 – MUX5:0: Analog Channel and Gain Selection Bits
The value of these bits selects which combination of analog inputs are connected to the ADC. In case of differential input,
gain selection is also made with these bits. Selections on Table 25-4 show values for single-ended channels and where the
differential channels as well as the offset calibration selections are located. Selecting the single-ended channel ADC8
enables the temperature measurement. See Table 25-4 for details. If these bits are changed during a conversion, the change
will not go into effect until this conversion is complete (ADIF in ADCSRA is set).
Table 25-4. Single Ended Input channel Selections.
Single Ended Input
MUX5..0
ADC0 (PA0)
000000
ADC1 (PA1)
000001
ADC2 (PA2)
000010
ADC3 (PA3)
000011
ADC4 (PA4)
000100
ADC5 (PA5)
000101
ADC6 (PA6)
000110
ADC7 (PA7)
Reserved for differential channels⁽¹⁾
000111
001000 - 011111
0V (AGND)
100000
1.1V (I Ref)
ADC8⁽²⁾
100001
100010
Reserved for offset calibration⁽³⁾
Reserved for reversal differential channels⁽¹⁾
Notes: 1. See Table 25-5 on page 151 for details.
100011 - 100111
101000 - 111111
2. Section 25.9 “Temperature Measurement” on page 148
3. For offset calibration only .See Table 25-5 on page 151 and Section 25.3 “ADC Operation” on page 138
See Table 25-5 on page 151 for details of selections of differential input channel selections as well as selections of offset
calibration channels. MUX0 bit works as a gain selection bit for differential channels shown in Table 25-5 on page 151. When
MUX0 bit is cleared (‘0’) 1x gain is selected and when it is set (‘1’) 20x gain is selected. For normal differential channel pairs
MUX5 bit work as a polarity reversal bit. Togling of the MUX5 bit exchanges the positive and negative channel other way a
round.
150 ATA8743 [DATASHEET]
9152D–INDCO–09/14