30.4.1 FVRCON

Fixed Voltage Reference Control Register

Note:

Fixed Voltage Reference output cannot exceed V_DD.
See the “Temperature Indicator Module” section for additional information.
FVRRDY is always ‘1’.

Name:	FVRCON
Address:	0x90C


Bit	7	6	5	4	3	2	1	0
	FVREN	FVRRDY	TSEN	TSRNG	CDAFVR[1:0]		ADFVR[1:0]
Access	R/W	R	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0

Bit 7 – FVREN Fixed Voltage Reference Enable bit

Value	Description
`1`	Fixed Voltage Reference is enabled
`0`	Fixed Voltage Reference is disabled

Bit 6 – FVRRDY Fixed Voltage Reference Ready Flag bit ⁽³⁾

Value	Description
`1`	Fixed Voltage Reference output is ready for use
`0`	Fixed Voltage Reference output is not ready or not enabled

Bit 5 – TSEN Temperature Indicator Enable bit⁽²⁾

Value	Description
`1`	Temperature Indicator is enabled
`0`	Temperature Indicator is disabled

Bit 4 – TSRNG Temperature Indicator Range Selection bit⁽²⁾

Value	Description
`1`	V_OUT = V_DD - 4 V_T (High Range)
`0`	V_OUT = V_DD - 2 V_T (Low Range)

Bits 3:2 – CDAFVR[1:0] Comparator FVR Buffer Gain Selection bits

Value	Description
`11`	Comparator FVR Buffer Gain is 4x, (4.096V)⁽¹⁾
`10`	Comparator FVR Buffer Gain is 2x, (2.048V)⁽¹⁾
`01`	Comparator FVR Buffer Gain is 1x, (1.024V)
`00`	Comparator FVR Buffer is off

Bits 1:0 – ADFVR[1:0] ADC FVR Buffer Gain Selection bit

Value	Description
`11`	ADC FVR Buffer Gain is 4x, (4.096V)⁽¹⁾
`10`	ADC FVR Buffer Gain is 2x, (2.048V)⁽¹⁾
`01`	ADC FVR Buffer Gain is 1x, (1.024V)
`00`	ADC FVR Buffer is off

Fixed Voltage Reference output cannot exceed VDD. See the “Temperature Indicator Module” section for additional information. FVRRDY is always ‘1’.

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