The best way to program your PIC chips is to use a USB programmer that communicates to your hardware via a USB interface. Here you can find essential information for choosing or building your own pic programming circuit. Which PIC Programmer Do You Need There are 4 types of PIC programmer Serial, Parallel, USB and Bootloader.

Set the вЂњPLL prescaler selectionвЂќ to divide by 5, so we get 4 MHz which are multiplied by 24 to get the 96 MHz for USB It will give 20 MHz at the input of вЂњprimary oscillatorвЂќ Set the вЂњ Oscillator SelectionвЂњ to HSPLL. For really serious work, a RealICE in-circuit emulator does all of the.

But here MCU has built in connections. Short 11th and 32nd pin together to 5v, similarly 12th and 31st pin to GND. The crystal oscillator used is 20MHZ crystal oscillator which is connected on 13 and 14 pin. The input voltage to a PIC18F4550 Microcontroller should never exceed 5 V. (96 MHz/2=48MHz USB interfacing circuit with pic microcontrollerMake the circuit diagram as shown in the schematic: Set the вЂњSystem clock postscaler selectionвЂќ to 96 divided by two.Finally, the Oscillator frequency is set to 48 MHz.

One switch is for the Reset buttonВ and is connected with pin 1. By this USB Interface circuit we are going to control 2 pins, RD2 and RD3. They are used for the communication purposeВ only to see that the USB communication exists.

Pic Programming Circuit