PIC18F25J50 MICROCHIP [Microchip Technology], PIC18F25J50 Datasheet - Page 405

• Manufacturer Part Number: PIC18F25J50
• Description: 28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

EXAMPLE 26-1:
 2011 Microchip Technology Inc.
#include <p18cxxx.h>
/**************************************************************************/
/*Setup CTMU *****************************************************************/
/**************************************************************************/
void setup(void)
{ //CTMUCON - CTMU Control register
/**************************************************************************/
//Setup AD converter;
/**************************************************************************/
}
CTMUCONH = 0x00;
CTMUCONL = 0x90;
//CTMU continues to run when emulator is stopped,CTMU continues
//to run in idle mode,Time Generation mode disabled, Edges are blocked
//No edge sequence order, Analog current source not grounded
//Edge2 polarity = positive level, Edge2 source =
//source 0, Edge1 polarity = positive level, Edge1 source = source 0,
//CTMUICON - CTMU Current Control Register
CTMUICON = 0x01;
TRISA=0x04;
// Configured AN2 as an analog channel
// ANCON0
ANCON0 = 0xFB;
// ANCON1
ANCON1 = 0x1F;
// ADCON1
ADCON1bits.ADFM=1;
ADCON1bits.ADCAL=0;
ADCON1bits.ACQT=1;
ADCON1bits.ADCS=2;
ANCON1bits.VBGEN=1;
// ADCON0
ADCON0bits.VCFG0 =0;
ADCON0bits.VCFG1 =0;
ADCON0bits.CHS=2;
ADCON0bits.ADON=1;
SETUP FOR CTMU CALIBRATION ROUTINES
//make sure CTMU is disabled
//0.55uA, Nominal - No Adjustment
//set channel 2 as an input
// Result format 1= Right justified
// Normal A/D conversion operation
// Acquisition time 7 = 20TAD 2 = 4TAD 1=2TAD
// Clock conversion bits 6= FOSC/64 2=FOSC/32
// Turn on the Bandgap (if not already on)
// Vref+ = AVdd
// Vref- = AVss
// Select ADC channel
// Turn on ADC
PIC18F46J50 FAMILY
DS39931D-page 405