64GA106 datasheet(227/330 Pages) MICROCHIP

227 / 330 page

 2010 Microchip Technology Inc.

DS39905E-page 227

PIC24FJ256GA110 FAMILY

AD1CON1: A/D CONTROL REGISTER 1

R/W-0

U-0

R/W-0

U-0

R/W-0

ADON(1)

—ADSIDL

—

—FORM1

FORM0

bit 15

bit 8

R/W-0

U-0

R/W-0

R/W-0, HCS

R-0, HCS

SSRC2

SSRC1

SSRC0

—

ASAM

SAMP

DONE

bit 7

bit 0

Legend:

HCS = Hardware Clearable/Settable bit

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 15

ADON:

A/D Operating Mode bit(1)

= A/D Converter module is operating

= A/D Converter is off

bit 14

Unimplemented:

Read as ‘0’

bit 13

ADSIDL:

Stop in Idle Mode bit

= Discontinue module operation when device enters Idle mode

= Continue module operation in Idle mode

bit 12-10

Unimplemented:

Read as ‘0’

bit 9-8

FORM<1:0>:

Data Output Format bits

= Signed fractional (sddd dddd dd00 0000)

= Fractional (dddd dddd dd00 0000)

= Signed integer (ssss sssd dddd dddd)

= Integer (0000 00dd dddd dddd)

bit 7-5

SSRC<2:0>:

Conversion Trigger Source Select bits

111

= Internal counter ends sampling and starts conversion (auto-convert)

110

= CTMU event ends sampling and starts conversion

101

= Reserved

100

= Timer5 compare ends sampling and starts conversion

011

= Reserved

010

= Timer3 compare ends sampling and starts conversion

001

= Active transition on INT0 pin ends sampling and starts conversion

000

= Clearing SAMP bit ends sampling and starts conversion

bit 4-3

Unimplemented:

Read as ‘0’

bit 2

ASAM:

A/D Sample Auto-Start bit

= Sampling begins immediately after last conversion completes; SAMP bit is auto-set

= Sampling begins when the SAMP bit is set

bit 1

SAMP:

A/D Sample Enable bit

= A/D sample/hold amplifier is sampling input

= A/D sample/hold amplifier is holding

bit 0

DONE:

A/D Conversion Status bit

= A/D conversion is done

= A/D conversion is NOT done

Note 1:

Values of ADC1BUFx registers will not retain their values once the ADON bit is cleared. Read out the

conversion values from the buffer before disabling the module.

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