The basics of how to get your firmware into your PIC microcontroller. App note can be found here.
For more than a decade, Microchip has published a lot of information about programming its 8-bit microcontrollers. There is now so much information out there, in fact, that it’s sometimes hard for engineers and technicians who are unfamiliar with Microchip products to know where to start. The purpose of this paper is to provide the entry point for information on programming Microchip’s 8-bit microcontrollers. While we can’t cover every programming specification in detail, we can give you a good idea of how the process works and show you what to look for in a specification. We’ll also touch briefly on how in-system programmability can affect an application’s design and finish with other programming and diagnostic innovations that make applications more reliable.