PIC16F1938_13 Datasheet, PDF (148/488 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver

PIC16(L)F1938/9
14.3 Register Definitions: FVR Control
REGISTER 14-1: FVRCON: FIXED VOLTAGE REFERENCE CONTROL REGISTER
R/W-0/0
FVREN
bit 7
R-q/q
FVRRDY⁽¹⁾
R/W-0/0
TSEN
R/W-0/0
TSRNG
R/W-0/0
R/W-0/0
CDAFVR<1:0>
R/W-0/0
R/W-0/0
ADFVR<1:0>
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 and DAC Fixed Voltage Reference Selection bit
11 = Comparator and DAC and CPS Fixed Voltage Reference Peripheral output is 4x (4.096V)⁽²⁾
10 = Comparator and DAC and CPS Fixed Voltage Reference Peripheral output is 2x (2.048V)⁽²⁾
01 = Comparator and DAC and CPS Fixed Voltage Reference Peripheral output is 1x (1.024V)
00 = Comparator and DAC and CPS Fixed Voltage Reference Peripheral output is off
ADFVR<1:0>: ADC Fixed Voltage Reference Selection bit
11 = ADC Fixed Voltage Reference Peripheral output is 4x (4.096V)⁽²⁾
10 = ADC Fixed Voltage Reference Peripheral output is 2x (2.048V)⁽²⁾
01 = ADC Fixed Voltage Reference Peripheral output is 1x (1.024V)
00 = ADC Fixed Voltage Reference Peripheral output is of
Note 1: FVRRDY is always ‘1’ on devices with LDO (PIC16F193X).
2: Fixed Voltage Reference output cannot exceed VDD.
3: See Section 16.0 “Temperature Indicator Module” for additional information.
TABLE 14-1: 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>
Legend: Shaded cells are not used with the Fixed Voltage Reference.
ADFVR<1:0>
148
DS40001574C-page 148
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