Datasheet

PIC18F97J94 FAMILY
DS30575A-page 462  2012 Microchip Technology Inc.
FIGURE 22-4: CONVERTING ONE CHANNEL, MANUAL SAMPLE START, MANUAL
CONVERSION START
EXAMPLE 22-1: CONVERTING ONE CHANNEL, MANUAL SAMPLE START, MANUAL
CONVERSION START CODE
FIGURE 22-5: CONVERTING ONE CHANNEL, AUTOMATIC SAMPLE START, MANUAL
CONVERSION START
A/D CLK
SAMP
ADC1BUF0
TSAMP TCONV
BCF AD1CON1, SAMPBSF AD1CON1, SAMP
Instruction Execution
DONE
int ADCValue;
ANSB = 0x0001; // AN2 as analog, all other pins are digital
AD1CON1 = 0x0000; // SAMP bit = 0 ends sampling and starts converting
AD1CHS = 0x0002; // Connect AN2 as S/H+ input
// in this example AN2 is the input
AD1CSSL = 0;
AD1CON3 = 0x0002; // Manual Sample, Tad = 3Tcy
AD1CON2 = 0;
AD1CON1bits.ADON = 1; // turn ADC ON
while (1) // repeat continuously
{
AD1CON1bits.SAMP = 1; // start sampling...
Delay(); // Ensure the correct sampling time has elapsed
// before starting conversion.
AD1CON1bits.SAMP = 0; // start converting
while (!AD1CON1bits.DONE){}; // conversion done?
ADCValue = ADC1BUF0; // yes then get ADC value
}
A/D CLK
SAMP
ADC1BUF0
TSAMP TCONV
BCF AD1CON1, SAMP
TCONV
BSF AD1CON1, ASAM
BCF AD1CON1, SAMP
TSAMP
TAD0
TAD0
Instruction Execution