Datasheet

PIC16(L)F1934/6/7
DS41364E-page 156  2008-2011 Microchip Technology Inc.
14.3 FVR Control Registers
TABLE 14-1: SUMMARY OF REGISTERS ASSOCIATED WITH 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 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
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
bit 5 TSEN: Temperature Indicator Enable bit
(3)
0 = Temperature Indicator is disabled
1 = Temperature Indicator is enabled
bit 4 TSRNG: Temperature Indicator Range Selection bit
(3)
0 =VOUT = VDD - 2VT (Low Range)
1 =V
OUT = VDD - 4VT (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)
(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)
(2)
11 = ADC Fixed Voltage Reference Peripheral output is 4x (4.096V)
(2)
Note 1: FVRRDY is always ‘1’ on devices with LDO (PIC16F1934/6/7).
2: Fixed Voltage Reference output cannot exceed V
DD.
3: See Section 16.0 “Temperature Indicator Module” 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> 156
Legend: Shaded cells are not used with the Fixed Voltage Reference.