Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SSOP 28 16-Bit 32 MHz I/O number 21

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PIC24FJ64GA004 FAMILY

DS39881E-page 196  2010-2013 Microchip Technology Inc.

R/W-0 R/W-0 R/W-0 U-0 U-0 R/W-0 U-0 U-0

VCFG2 VCFG1 VCFG0

— — CSCNA — —

bit 15 bit 8

R-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0

BUFS

— SMPI3 SMPI2 SMPI1 SMPI0 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>: Voltage Reference Configuration bits

bit 12-11 Unimplemented: Read as ‘0’

bit 10 CSCNA: Scan Input Selections for CH0+ S/H Input for MUX A Input Multiplexer Setting bit

1 = Scans inputs

0 = Does not scan inputs

bit 9-8 Unimplemented: Read as ‘0’

bit 7 BUFS: Buffer Fill Status bit (valid only when BUFM = 1)

1 = A/D is currently filling Buffer 08-0F, user should access data in 00-07

0 = A/D is currently filling Buffer 00-07, user should access data in 08-0F

bit 6 Unimplemented: Read as ‘0’

bit 5-2 SMPI<3:0>: Sample/Convert Sequences Per Interrupt Selection bits

1111 = Interrupts at the completion of conversion for each 16th sample/convert sequence

1110 = Interrupts at the completion of conversion for each 15th sample/convert sequence

.....

0001 = Interrupts at the completion of conversion for each 2nd sample/convert sequence

0000 = Interrupts at the completion of conversion for each sample/convert sequence

bit 1 BUFM: Buffer Mode Select bit

1 = Buffer configured as two 8-word buffers (ADC1BUFn<15:8> and ADC1BUFn<7:0>)

0 = Buffer configured as one 16-word buffer (ADC1BUFn<15:0>)

bit 0 ALTS: Alternate Input Sample Mode Select bit

1 = Uses MUX A input multiplexer settings for first sample, then alternates between MUX B and MUX A

input multiplexer settings for all subsequent samples

0 = Always uses MUX A input multiplexer settings

VCFG<2:0> VR+VR-

000 AVDD* AVSS*

001 External VREF+ Pin AVSS*

010 AVDD* External VREF- Pin

011 External V

REF+ Pin External VREF- Pin

1xx AVDD* AVSS*

*AVDD and AVSS inputs are tied to VDD and VSS on 28-pin devices.