Datasheet

PIC16(L)F1826/27
DS41391D-page 136  2011 Microchip Technology Inc.
14.3 FVR Control Registers
TABLE 14-1: SUMMARY OF REGISTERS ASSOCIATED WITH THE FVR MODULE
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)
Reserved Reserved 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 5-4 Reserved: Read as ‘0’. Maintain these bits clear.
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 (PIC16F1826/27).
2: 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
Reserved Reserved CDAFVR1 CDAFVR0 ADFVR1 ADFVR0 136
Legend: Shaded cells are unused by the FVR module.