Datasheet

PIC18(L)F1XK22
DS40001365F-page 232  2009-2016 Microchip Technology Inc.
20.3 Register Definitions: FVR Control
REGISTER 20-1: VREFCON0: FIXED VOLTAGE REFERENCE CONTROL REGISTER
R/W-0 R/W-0 R/W-0 R/W-1 U-0 U-0 U-0 U-0
FVR1EN FVR1ST
FVR1S<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
bit 7 FVR1EN: Fixed Voltage Reference Enable bit
0 = Fixed Voltage Reference is disabled
1 = Fixed Voltage Reference is enabled
bit 6 FVR1ST: Fixed Voltage Reference Ready Flag bit
0 = Fixed Voltage Reference output is not ready or not enabled
1 = Fixed Voltage Reference output is ready for use
bit 5-4 FVR1S<1:0>: Fixed Voltage Reference Selection bits
00 = Fixed Voltage Reference Peripheral output is off
01 = Fixed Voltage Reference Peripheral output is 1x (1.024V)
10 = Fixed Voltage Reference Peripheral output is 2x (2.048V)
(1)
11 = Fixed Voltage Reference Peripheral output is 4x (4.096V)
(1)
bit 3-2 Reserved: Read as ‘0’. Maintain these bits clear.
bit 1-0 Unimplemented: Read as ‘0’.
Note 1: Fixed Voltage Reference output cannot exceed VDD.
TABLE 20-1: 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
Reset
Values on
Page
VREFCON0 FVR1EN FVR1ST FVR1S<1:0>
— — — —
232
Legend:
— = unimplemented locations, read as ‘0’. Shaded bits are not used by the FVR module.