PIC18LF24K Datasheet, PDF (418/594 Pages) –

PIC18(L)F26/45/46K40
28.3 Register Definitions: FVR Control
REGISTER 28-1: FVRCON: FIXED VOLTAGE REFERENCE CONTROL REGISTER
R/W-0/0
FVREN
R-q/q
FVRRDY⁽¹⁾
R/W-0/0
TSEN⁽³⁾
R/W-0/0
TSRNG⁽³⁾
R/W-0/0
R/W-0/0
CDAFVR<1:0>
R/W-0/0
R/W-0/0
ADFVR<1:0>
bit 7
bit 0
Legend:
R = Readable bit
u = Bit is unchanged
‘1’ = Bit is set
W = Writable bit
x = Bit is unknown
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
-n/n = Value at POR and BOR/Value at all other Resets
q = Value depends on condition
bit 7
bit 6
bit 5
bit 4
bit 3-2
bit 1-0
FVREN: Fixed Voltage Reference Enable bit
1 ⁼ Fixed Voltage Reference is enabled
0 ⁼ Fixed Voltage Reference is disabled
FVRRDY: Fixed Voltage Reference Ready Flag bit⁽¹⁾
1 = Fixed Voltage Reference output is ready for use
0 = Fixed Voltage Reference output is not ready or not enabled
TSEN: Temperature Indicator Enable bit⁽³⁾
1 = Temperature Indicator is enabled
0 = Temperature Indicator is disabled
TSRNG: Temperature Indicator Range Selection bit⁽³⁾
1 = VOUT = VDD - 4VT (High Range)
0 = VOUT = VDD - 2VT (Low Range)
CDAFVR<1:0>: Comparator FVR Buffer Gain Selection bits
11 = Comparator FVR Buffer Gain is 4x, (4.096V)⁽²⁾
10 = Comparator FVR Buffer Gain is 2x, (2.048V)⁽²⁾
01 = Comparator FVR Buffer Gain is 1x, (1.024V)
00 = Comparator FVR Buffer is off
ADFVR<1:0>: ADC FVR Buffer Gain Selection bit
11 = ADC FVR Buffer Gain is 4x, (4.096V)⁽²⁾
10 = ADC FVR Buffer Gain is 2x, (2.048V)⁽²⁾
01 = ADC FVR Buffer Gain is 1x, (1.024V)
00 = ADC FVR Buffer is off
Note 1:
2:
3:
FVRRDY is always ‘1’.
Fixed Voltage Reference output cannot exceed VDD.
See Section 29.0 “Temperature Indicator Module” for additional information.
TABLE 28-1: SUMMARY OF REGISTERS ASSOCIATED WITH FIXED VOLTAGE REFERENCE
Name
Bit 7
Bit 6
Bit 5 Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on page
FVRCON
FVREN FVRRDY TSEN TSRNG CDAFVR<1:0>
ADFVR<1:0>
418
ADCON0
ADON ADCONT — ADCS
—
ADFM
—
ADGO
443
CMxNCH
—
—
—
—
—
CxNCH<2:0>
464
CMxPCH
—
—
—
—
—
CxPCH<2:0>
465
DAC1CON1
—
—
—
DAC1R<4:0>
424
Legend: — = Unimplemented location, read as ‘0’. Shaded cells are not used with the Fixed Voltage Reference.
 2016 Microchip Technology Inc.
Preliminary
DS40001816C-page 418