MPLAB PICkit 4 Help

Circuits That Will Prevent the Debugger From Functioning

Figure: Improper Circuit Components shows the active debugger lines with some components that will prevent the MPLAB PICkit 4 debugger system from functioning.

Figure: Improper Circuit Components

Specifically, these guidelines must be followed:

•	Do not use pull-ups on PGC/PGD – they will disrupt the voltage levels, since these lines have programmable pull-down resistors in the debugger.

•	Do not use capacitors on PGC/PGD – they will prevent fast transitions on data and clock lines during programming and debug communications.

•	Do not use capacitors on MCLR – they will prevent fast transitions of Vpp. A simple pull-up resistor is generally sufficient.

•	Do not use diodes on PGC/PGD – they will prevent bidirectional communication between the debugger and the target device.

Microchip Support Help Updated: 2019-09-24 09:36:22Z Help Page: 14