Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet
Product codes
ATSAMD21-XPRO
858
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
z
Bits 7:5 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
z
Bits 4:0 – MUXPOS[4:0]: Positive Mux Input Selection
These bits define the Mux selection for the positive ADC input.
These bits define the Mux selection for the positive ADC input.
shows the possible input selections. If
the internal bandgap voltage or temperature sensor input channel is selected, then the Sampling Time Length bit
group in the SamplingControl register must be written.
group in the SamplingControl register must be written.
Table 32-14. Positive Mux Input Selection
MUXPOS[4:0]
Group configuration
Description
0x00
PIN0
ADC AIN0 pin
0x01
PIN1
ADC AIN1 pin
0x02
PIN2
ADC AIN2 pin
0x03
PIN3
ADC AIN3 pin
0x04
PIN4
ADC AIN4 pin
0x05
PIN5
ADC AIN5 pin
0x06
PIN6
ADC AIN6 pin
0x07
PIN7
ADC AIN7 pin
0x08
PIN8
ADC AIN8 pin
0x09
PIN9
ADC AIN9 pin
0x0A
PIN10
ADC AIN10 pin
0x0B
PIN11
ADC AIN11 pin
0x0C
PIN12
ADC AIN12 pin
0x0D
PIN13
ADC AIN13 pin
0x0E
PIN14
ADC AIN14 pin
0x0F
PIN15
ADC AIN15 pin
0x10
PIN16
ADC AIN16 pin
0x11
PIN17
ADC AIN17 pin
0x12
PIN18
ADC AIN18 pin
0x13
PIN19
ADC AIN19 pin
0x14-0x17
Reserved
0x18
TEMP
Temperature reference
0x19
BANDGAP
Bandgap voltage
0x1A
SCALEDCOREVCC
1/4 scaled core supply
0x1B
SCALEDIOVCC
1/4 scaled I/O supply
0x1C
DAC
DAC output
0x1D-0x1F
Reserved