Microchip Technology PIC12F1501, Manual

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2011-2015 Microchip Technology Inc. DS40001609E-page 125
PIC16(L)F1508/9
13.3 Register Definitions: FVR Control
TABLE 13-2: SUMMARY OF REGISTERS ASSOCIATED WITH THE FIXED VOLTAGE REFERENCE
REGISTER 13-1: FVRCON: FIXED VOLTAGE REFERENCE CONTROL REGISTER
R/W-0/0 R-q/q R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0
FVREN
(1)
FVRRDY
(2)
TSEN
(3)
TSRNG
(3)
CDAFVR<1:0>
(1)
ADFVR<1:0>
(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
u = Bit is unchanged x = Bit is unknown -n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set ‘0’ = Bit is cleared q = Value depends on condition
bit 7
FVREN:
Fixed Voltage Reference Enable bit
(1)
1
= Fixed Voltage Reference is enabled
0
= Fixed Voltage Reference is disabled
bit 6
FVRRDY:
Fixed Voltage Reference Ready Flag bit
(2)
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 (3)
1
= Temperature Indicator is enabled
0
= Temperature Indicator is disabled
bit 4
TSRNG:
Temperature Indicator Range Selection bit
(3)
1
= V
OUT
= V
DD
- 4V
T
(High Range)
0
= V
OUT
= V
DD
- 2V
T
(Low Range)
bit 3-2
CDAFVR<1:0>:
Comparator FVR Buffer Gain Selection bits
(1)
11
= Comparator FVR Buffer Gain is 4x, with output voltage = 4x V
FVR
(4.096V nominal)
(4)
10
= Comparator FVR Buffer Gain is 2x, with output voltage = 2x V
FVR
(2.048V nominal)
(4)
01
= Comparator FVR Buffer Gain is 1x, with output voltage = 1x V
FVR
(1.024V nominal)
00
= Comparator FVR Buffer is off
bit 1-0
ADFVR<1:0>:
ADC FVR Buffer Gain Selection bit
(1)
11
= ADC FVR Buffer Gain is 4x, with output voltage = 4x V
FVR
(4.096V nominal)
(4)
10
= ADC FVR Buffer Gain is 2x, with output voltage = 2x V
FVR
(2.048V nominal) (4)
01
= ADC FVR Buffer Gain is 1x, with output voltage = 1x V
FVR
(1.024V nominal)
00
= ADC FVR Buffer is off
Note 1:
To minimize current consumption when the FVR is disabled, the FVR buffers should be turned off by clear-
ing the Buffer Gain Selection bits.
2:
FVRRDY is always ‘
1
’ for the PIC16F1508/9 devices.
3:
See
Section 14.0 “Temperature Indicator Module”
for additional information.
4:
Fixed Voltage Reference output cannot exceed V
DD
.
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> 125
Legend:
Shaded cells are unused by the Fixed Voltage Reference module.