Datasheet

 2010-2012 Microchip Technology Inc. DS41417B-page 97

PIC16(L)F722A/723A

10.0 FIXED VOLTAGE REFERENCE

This device contains an internal voltage regulator. To

provide a reference for the regulator, a band gap

reference is provided. This band gap is also user

accessible via an A/D converter channel.

User level band gap functions are controlled by the

FVRCON register, which is shown in Register 10-1.

R-q R/W-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0

FVRRDY FVREN — — — — ADFVR1 ADFVR0

bit 7 bit 0

Legend:

R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’

-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown

q = Value depends on condition

bit 7 FVRRDY: Fixed Voltage Reference Ready Flag bit

0 = Fixed Voltage Reference output is not active or stable

1 = Fixed Voltage Reference output is ready for use

bit 6 FVREN

(1)

: Fixed Voltage Reference Enable bit

0 = Fixed Voltage Reference is disabled

1 = Fixed Voltage Reference is enabled

bit 5-2 Unimplemented: Read as ‘0’

bit 1-0 ADFVR<1:0>: A/D Converter Fixed Voltage Reference Selection bits

00 = A/D Converter Fixed Voltage Reference Peripheral output is off.

01 = A/D Converter Fixed Voltage Reference Peripheral output is 1x (1.024V)

10 = A/D Converter Fixed Voltage Reference Peripheral output is 2x (2.048V)

(1)

11 = A/D Converter Fixed Voltage Reference Peripheral output is 4x (4.096V)

(1)

Note 1: Fixed Voltage Reference output cannot exceed VDD.