REFCTRL

Name:: REFCTRL
Offset:: 0x02
Reset:: 0x00
Access:: PAC Write-Protection, Enable-Protected

Bit7	6	5	4	3	2	1	0
REFCOMP				REFSEL[3:0]
AccessR/W				R/W	R/W	R/W	R/W
Reset0				0	0	0	0

Bit 7 – REFCOMP: Reference Buffer Offset Compensation Enable

Reference Buffer Offset Compensation Enable

The gain error can be reduced by enabling the reference buffer offset compensation. This will decrease the input impedance and thus increase the start-up time of the reference.

Value	Description
0	Reference buffer offset compensation is disabled.
1	Reference buffer offset compensation is enabled.

Bits 3:0 – REFSEL[3:0]: Reference Selection

Reference Selection

These bits select the reference for the ADC.

Value	Name	Description
0x0	INTREF	internal reference voltage
x01	INTVCC0	1/1.6 VDDANA
0x2	INTVCC1	1/2 VDDANA (only for VDDANA > 4.0V)
0x3	VREFA	External reference
0x4	DAC	DAC internal output
0x5	INTVCC2	VDDANA
0x6 - 0xF		Reserved