70592C datasheet(214/314 Pages) MICROCHIP

214 / 314 page

PIC24HJXXXGPX06A/X08A/X10A

DS70592C-page 214

ADxCON2: ADCx CONTROL REGISTER 2 (where x = 1 or 2)

R/W-0

U-0

R/W-0

VCFG<2:0>

—

CSCNA

CHPS<1:0>

bit 15

bit 8

R-0

U-0

R/W-0

BUFS

—

SMPI<3:0>

BUFM

ALTS

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 15-13

VCFG<2:0>: Converter Voltage Reference Configuration bits

bit 12-11

Unimplemented: Read as ‘0’

bit 10

CSCNA: Scan Input Selections for CH0+ during Sample A bit

1 = Scan inputs

0 = Do not scan inputs

bit 9-8

CHPS<1:0>: Selects Channels Utilized bits

When AD12B = 1, CHPS<1:0> is: U-0, Unimplemented, Read as ‘0’

1x = Converts CH0, CH1, CH2 and CH3

01 = Converts CH0 and CH1

00 = Converts CH0

bit 7

BUFS: Buffer Fill Status bit (only valid when BUFM = 1)

1 = ADC is currently filling second half of buffer, user should access data in first half

0 = ADC is currently filling first half of buffer, user should access data in second half

bit 6

Unimplemented: Read as ‘0’

bit 5-2

SMPI<3:0>: Selects Increment Rate for DMA Addresses bits or number of sample/conversion

operations per interrupt

1111 = Increments the DMA address or generates interrupt after completion of every 16th

sample/conversion operation

1110 = Increments the DMA address or generates interrupt after completion of every 15th

sample/conversion operation

•

0001 = Increments the DMA address or generates interrupt after completion of every 2nd

sample/conversion operation

0000 = Increments the DMA address or generates interrupt after completion of every

sample/conversion operation

bit 1

BUFM: Buffer Fill Mode Select bit

1 = Starts filling first half of buffer on first interrupt and second half of buffer on next interrupt

0 = Always starts filling buffer from the beginning

bit 0

ALTS: Alternate Input Sample Mode Select bit

1 = Uses channel input selects for Sample A on first sample and Sample B on next sample

0 = Always uses channel input selects for Sample A

VREF+VREF-

000

AVDD

AVSS

001

External VREF+AVSS

010

AVDD

External VREF-

011

External VREF+

External VREF-

1xx

AVDD

AVSS

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