PIC16F722AT-ISLASHSP datasheet(97/284 Pages) MICROCHIP

97 / 284 page

 2010 Microchip Technology Inc.

DS41417A-page 97

PIC16F/LF722A/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.

FVRCON: FIXED VOLTAGE REFERENCE REGISTER

R-q

R/W-0

U-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.

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