PIC16F1933_11 Datasheet, PDF (138/430 Pages) Microchip Technology – 28-Pin Flash-Based, 8-Bit CMOS Microcontrollers LCD Driver and nanoWatt XLP Technology

PIC16(L)F1933
14.3 FVR Control Registers
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
0 = Fixed Voltage Reference is disabled
1 = Fixed Voltage Reference is enabled
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
TSEN: Temperature Indicator Enable bit⁽³⁾
0 = Temperature Indicator is disabled
1 = Temperature Indicator is enabled
TSRNG: Temperature Indicator Range Selection bit⁽³⁾
0 = VOUT = VDD - 2VT (Low Range)
1 = VOUT = VDD - 4VT (High Range)
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)⁽²⁾
11 = Comparator and DAC Fixed Voltage Reference Peripheral output is 4x (4.096V)⁽²⁾
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)⁽²⁾
11 = ADC Fixed Voltage Reference Peripheral output is 4x (4.096V)⁽²⁾
Note 1:
2:
3:
FVRRDY is always ‘1’ on devices with LDO (PIC16F1933).
Fixed Voltage Reference output cannot exceed VDD.
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
FVRCON
FVREN FVRRDY
TSEN
TSRNG
CDAFVR<1:0>
Legend: Shaded cells are not used with the Fixed Voltage Reference.
Bit 1
Bit 0
ADFVR<1:0>
Register
on page
138
DS41575A-page 138
Preliminary
 2011 Microchip Technology Inc.