PIC12F615 datasheet(72/168 Pages) MICROCHIP

72 / 168 page

PIC12F609/615/12HV609/615

DS41302A-page 70

Preliminary

9.2.7

ADC REGISTER DEFINITIONS

The following registers are used to control the operation of the ADC.

ADCON0: A/D CONTROL REGISTER 0

R/W-0

U-0

R/W-0

ADFM

VCFG

—

CHS2

CHS1

CHS0

GO/DONE

ADON

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

bit 7

ADFM: A/D Conversion Result Format Select bit

= Right justified

= Left justified

bit 6

VCFG: Voltage Reference bit

= VREF pin

= VSS

bit 5

Unimplemented: Read as ‘0’

bit 4-2

CHS<2:0>: Analog Channel Select bits

000

= Channel 00 (AN0)

001

= Channel 01 (AN1)

010

= Channel 02 (AN2)

011

= Channel 03 (AN3)

100

= CVREF

101

= 0.6V Reference

110

= 1.2V Reference

111

= Reserved. Do not use.

bit 1

GO/DONE: A/D Conversion Status bit

= A/D conversion cycle in progress. Setting this bit starts an A/D conversion cycle.

This bit is automatically cleared by hardware when the A/D conversion has completed.

= A/D conversion completed/not in progress

bit 0

ADON: ADC Enable bit

= ADC is enabled

= ADC is disabled and consumes no operating current

Note 1:

When the CHS<2:0> bits change to select the 1.2V or 0.6V reference, the reference output voltage will

have a transient. If the Comparator module uses this 0.6V reference voltage, the comparator output may

momentarily change state due to the transient.

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