31.5.3 Control C

Name:	CTRLC
Offset:	0x02
Reset:	0x00
Property:	-


Bit	7	6	5	4	3	2	1	0
						REFSEL[2:0]
Access						R/W	R/W	R/W
Reset						0	0	0

Bits 2:0 – REFSEL[2:0] Reference Selection

This bit field controls the voltage reference for the ADC. Changing to one of the internal references will require a 40 µs initialization time for the first conversion.

Note: The internal references can be used only if lower than V_DD - 0.5V.

Value	Name	Description
0x0	VDD	V_DD
0x1	-	Reserved
0x2	EXTVREF	External Reference VREFA for ADC0
0x3	0V512	Internal reference 0.512V
0x4	1V024	Internal reference 1.024V
0x5	2V048	Internal reference 2.048V
0x6	4V096	Internal reference 4.096V
0x7	2V500	Internal reference 2.500V