PIC18F23K20-ESLASHML datasheet(271/456 Pages) MICROCHIP

271 / 456 page

 2010 Microchip Technology Inc.

DS41303G-page 271

PIC18F2XK20/4XK20

19.2.10

ADC REGISTER DEFINITIONS

The following registers are used to control the opera-

tion of the ADC.

Note:

Analog pin control is performed by the

ANSEL and ANSELH registers. For ANSEL

and ANSELH registers, see Register 10-2

and Register 10-3, respectively.

ADCON0: A/D CONTROL REGISTER 0

U-0

R/W-0

—

CHS3

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 7-6

Unimplemented: Read as ‘0’

bit 5-2

CHS<3:0>: Analog Channel Select bits

0000

= AN0

0001

= AN1

0010

= AN2

0011

= AN3

0100

= AN4

0101

= AN5(1)

0110

= AN6(1)

0111

= AN7(1)

1000

= AN8

1001

= AN9

1010

= AN10

1011

= AN11

1100

= AN12

1101

= Reserved

1110

= Reserved

1111

= FVR (1.2 Volt Fixed Voltage Reference)(2)

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:

These channels are not implemented on PIC18F2XK20 devices.

Allow greater than 15

s acquisition time when measuring the Fixed Voltage Reference.

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