PIC24FV32KA302-ISLASHML datasheet(209/364 Pages) MICROCHIP

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DS39995D-page 209

PIC24FV32KA304 FAMILY

To perform an A/D conversion:

Configure the A/D module:

a) Configure the port pins as analog inputs

and/or select band gap reference inputs

(ANS<12:10>, ANS<5:0>).

b) Select voltage reference source to match

the expected range on the analog inputs

(AD1CON2<15:13>).

Select the analog conversion clock to

match the desired data rate with the

processor clock (AD1CON3<7:0>).

d) Select the appropriate sample/conver-

sion sequence (AD1CON1<7:4> and

AD1CON3<12:8>).

e) Select

how

conversion

results

are

presented in the buffer (AD1CON1<9:8>).

Select the interrupt rate (AD1CON2<6:2>).

g) Turn on the A/D module (AD1CON1<15>).

Configure the A/D interrupt (if required):

a) Clear the AD1IF bit.

b) Select the A/D interrupt priority.

To perform an A/D sample and conversion using

Threshold Detect scanning:

Configure the A/D module:

Configure the port pins as analog inputs

(ANS<12:10>, ANS<5,0>).

b) Select the voltage reference source to

match the expected range on the analog

inputs (AD1CON2<15:13>).

Select the analog conversion clock to

match the desired data rate with the

processor clock (AD1CON3<7:0>).

Select

the

appropriate

sample/conversion

sequence (AD1CON1<7:4>, AD1CON3<12:8>).

Select how the conversion results are

presented in the buffer (AD1CON1<9:8>).

Select the interrupt rate (AD1CON2<6:2>).

Configure the threshold compare channels:

Enable auto-scan – ASEN bit (AD1CON5<15>).

Select the Compare mode, “Greater Than,

Less Than or Windowed” – CMx bits

(AD1CON5<1:0>).

Select the threshold compare channels to

be scanned (ADCSSH, ADCSSL).

If the CTMU is required as a current

source for a threshold compare channel,

enable the corresponding CTMU channel

(ADCCTMUENH, ADCCTMUENL).

Write the threshold values into the

corresponding ADC1BUFn registers.

Turn on the A/D module (AD1CON1<15>).

Configure the A/D interrupt (OPTIONAL):

Clear the AD1IF bit.

Select the A/D interrupt priority.

Note:

performing

A/D

sample

and

conversion using Threshold Detect in Sleep

Mode, the RC A/D clock source must be

selected before entering into Sleep mode.

PIC24FV32KA302-I/ML Datasheet(PDF) 209 Page - Microchip Technology

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