If you are using a programmer with 'real' voltage levels (NOT a JDM2!), your application can run from its own power supply when programmed, eliminating these connections. + (Vdd)/-(Vss) These are the power & ground connections (Vdd, Vss). Power, ground, a programming voltage, clock, and data. Five connections are required to program a PIC. I add a 5 pin header to my circuit boards to make this connection quick and easy. Five connections are needed to program a PIC while attached to an application circuit. Its a pain to move chips in & out of the programmer during development. There are no programming sockets for small package chips. It is a way of programming a PIC while it is still attached to the application circuit. ICSP means 'in circuit serial programmer(ing?)'. A different clip is needed for each chip type and pin count you use. There are really expensive ($100s) clips that can attach to, and program, these chips. There are no standard sockets for QFN, SSOP, QFP, or even the large SOIC.300 packages. Things get more difficult with smaller (surface mount) chips. Pop it into a socketed programmer, burn, and return to the application circuit. Programming a big DIP (through hole) chip is easy. In-Circuit Serial Programming - PICmicro Mid-Range MCU Family. Low voltage programming Low speed Clock mode. This is the second in a series of articles describing the construction of an interface board suitable for controlling 2 motors, 2 servos and providing a collection of binary inputs and outputs (here is the previous. Serial Programming - Part 1 (PIC16F628A) Posted on 14th October 2012 Tagged in electronics, microcontrollers, pic, tutorial.
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