Debugger Connection To Target

6-pin RJ-11 or ICSP™ Header

Microchip Technology's in-circuit debugging system makes use of the In-Circuit Serial Programming (ICSP™) connection available on all One-Time Programmable (OTP) and Flash microcontrollers. The ICSP connection consists of a 6-pin cable, typically with an RJ-25 type modular connector (same as the RJ-11 American telephone jack but with all six conductors in use) or a simpler 6 x 1 pin header connector as seen on the PICkit™ 3 in-circuit debugger.


The signals consist of Power, Ground, Clock, Data, Master Clear, and in some cases, Program Mode Enable (for Low Voltage Programming (LVP) on devices that support it).

Signal Description
VPP / MCLR Programming Voltage and Master Clear
VDD Power
VSS Ground
PGD Data
PGC Clock
PGM LVP Program Enable
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