Microchip Technology dsPIC33F Family Especificaciones descargar pdf (Pagina 44)

dsPIC33F Family Reference Manual

Table 16-5: Converting Two Sets of Two Inputs Using Alternating Input Selections

CONTROL BITS OPERATION SEQUENCE

Sequence Select Sample MUX A Inputs: AN1 -> CH0, AN0 -> CH1

SMPI<3:0> =

0001

, AMODE =

, DMAxCNT =

Convert CH0, write ADC1BUF0, and generate DMA Request

Alt. Sampling, DMA Interrupt on 8th conversion Convert CH1, write ADC1BUF0, and generate DMA Request

CHPS<1:0> = 01 Sample MUX B Inputs: AN15 -> CH0, (AN3-AN9) -> CH1

Sample Channels CH0, CH1 Convert CH0, write ADC1BUF0, and generate DMA Request

SIMSAM = 1 Convert CH1, write ADC1BUF0, and generate DMA Request

Sample all channels simultaneously Sample MUX A Inputs: AN1 -> CH0, AN0 -> CH1

BUFM = 1 Convert CH0, write ADC1BUF0, and generate DMA Request

Dual 8-word result buffers Convert CH1, write ADC1BUF0, and generate DMA Request

ALTS = 1 Sample MUX B Inputs: AN15 -> CH0, (AN3-AN9) -> CH1

Alternate MUX A/B input select Convert CH0, write ADC1BUF0, and generate DMA Request

MUX A Input Select Convert CH1, write ADC1BUF0, and generate DMA Request

CH0SA<3:0> = 0001 Interrupt

Select AN1 for CH0+ input Repeat

CH0NA = 0

Select V

REF- for CH0- input

CSCNA = 0

No input scan

CSSL<15:0> = n/a

Scan input select unused

CH123SA = 0

CH1+ = AN0, CH2+ = AN1, CH3+ = AN2

CH123NA<1:0> = 0x

CH1-, CH2-, CH3- = V

REF-

MUX B Input Select

CH0SB<3:0> = 1111

Select AN15 for CH0+ input

CH0NB = 0

Select V

REF- for CH0- input

CH123SB = 1

CH1+ = AN3, CH2+ = AN4, CH3+ = AN5

CH123NB<1:0> = 11

CH1- = AN9, CH2- = AN10, CH3- = AN11

DMA Buffer @

1st DMA Interrupt

DMA Buffer @

2nd DMA Interrupt

AN1 Sample 1 AN1 Sample 3

AN0 Sample 1 AN0 Sample 3

AN15 Sample 1 AN15 Sample 3

(AN3-AN9) Sample 1 (AN3-AN9) Sample 3

AN1 Sample 2 AN1 Sample 4

AN0 Sample 2 AN0 Sample 4

AN15 Sample 2 AN15 Sample 4

(AN3-AN9) Sample 2 (AN3-AN9) Sample 4

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 65 66

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Microchip Technology dsPIC33F Family Especificaciones Pagina 44

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