PIC12F1822-ISLASHMF datasheet(132/398 Pages) MICROCHIP

132 / 398 page

PIC12F/LF1822/16F/LF1823

DS41413A-page 132

Preliminary

 2010 Microchip Technology Inc.

TABLE 14-1:

SUMMARY OF REGISTERS ASSOCIATED WITH THE FIXED VOLTAGE REFERENCE

FVRCON: FIXED VOLTAGE REFERENCE CONTROL REGISTER

R/W-0/0

R-q/q

R/W-0/0

FVREN

FVRRDY(1)

Reserved

CDAFVR1

CDAFVR0

ADFVR1

ADFVR0

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 bits

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 bits

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 the LDO (PIC12F1822/16F1823).

Fixed Voltage Reference output cannot exceed VDD.

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

on page

FVRCON

FVREN

FVRRDY

Reserved

CDAFVR1

CDAFVR0

ADFVR1

ADFVR0

132

Legend:

Shaded cells are unused by the Fixed Voltage Reference module.

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