Microchip Technology AC244045 Data Sheet
PIC16(L)F1825/1829
DS41440C-page 146
2010-2012 Microchip Technology Inc.
14.3
FVR Control Registers
TABLE 14-1:
SUMMARY OF REGISTERS ASSOCIATED WITH THE FIXED VOLTAGE REFERENCE
REGISTER 14-1:
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
FVRRDY
(1)
TSEN
TSRNG
CDAFVR<1:0>
ADFVR<1:0>
bit 7
bit 0
Legend:
R = Readable bit
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
0 = Fixed Voltage Reference is disabled
1 = Fixed Voltage Reference is enabled
1 = Fixed Voltage Reference is enabled
bit 6
FVRRDY:
Fixed Voltage Reference Ready Flag bit
(1)
0 = Fixed Voltage Reference output is not ready or not enabled
1 = Fixed Voltage Reference output is ready for use
1 = Fixed Voltage Reference output is ready for use
bit 5
TSEN:
Temperature Indicator Enable bit
0 = Temperature indicator is disabled
1 = Temperature indicator is enabled
1 = Temperature indicator is enabled
bit 4
TSRNG:
Temperature Indicator Range Selection bit
(3)
0 = V
OUT
= V
DD
- 2V
T
(Low Range)
1 = V
OUT
= V
DD
- 4V
T
(High Range)
bit 3-2
CDAFVR<1:0>:
Comparator and DAC Fixed Voltage Reference Selection bit
00 = Comparator and DAC Fixed Voltage Reference Peripheral output is off
01 = Comparator and DAC Fixed Voltage Reference Peripheral output is 1x (1.024V)
10 = Comparator and DAC Fixed Voltage Reference Peripheral output is 2x (2.048V)
01 = Comparator and DAC Fixed Voltage Reference Peripheral output is 1x (1.024V)
10 = Comparator and DAC Fixed Voltage Reference Peripheral output is 2x (2.048V)
(2)
11 = Comparator and DAC Fixed Voltage Reference Peripheral output is 4x (4.096V)
(2)
bit 1-0
ADFVR<1:0>:
ADC Fixed Voltage Reference Selection bit
00 = ADC Fixed Voltage Reference Peripheral output is off
01 = ADC Fixed Voltage Reference Peripheral output is 1x (1.024V)
10 = ADC Fixed Voltage Reference Peripheral output is 2x (2.048V)
01 = ADC Fixed Voltage Reference Peripheral output is 1x (1.024V)
10 = ADC Fixed Voltage Reference Peripheral output is 2x (2.048V)
(2)
11 = ADC Fixed Voltage Reference Peripheral output is 4x (4.096V)
(2)
Note 1:
FVRRDY is always ‘1’ on devices with the LDO (PIC16F1825/1829).
2:
Fixed Voltage Reference output cannot exceed V
DD
.
3:
See
for additional information.
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>
Legend:
Shaded cells are unused by the Fixed Voltage Reference module.