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How do I dump bootloader (.hex) file to my pic18f4620 mcu using usb to serial connector(RS232)? I am not using pickit like burner/ programmer device. And as well how do I enable/ disable in-circuit programming mode?

Amar Kamthe
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In all cases that I know of you need to manipulate PIC pins MCLR, DATA, CLK & PGM to program a blank processor. It is possible to use a parallel port and minimal hardware to do this. Using a serial port controlled by a USB connection will be so much more difficult to implement than the parallel port approach it is unlikely any such solutions will be found.

st2000
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