Datasheet

PIC18(L)F2X/4XK22

DS41412F-page 344  2010-2012 Microchip Technology Inc.

21.3 Register Definitions: FVR Control

R/W-0 R/W-0 R/W-0 R/W-1 U-0 U-0 U-0 U-0

FVREN FVRST FVRS<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 FVREN: Fixed Voltage Reference Enable bit

0 = Fixed Voltage Reference is disabled

1 = Fixed Voltage Reference is enabled

bit 6 FVRST: 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 FVRS<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 V

DD.

TABLE 21-1: 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

on Page

VREFCON0 FVREN FVRST FVRS<1:0>

— — — —

344

Legend:

— = unimplemented locations, read as ‘0’. Shaded bits are not used by the FVR module.