Logic Probe Function -

1. What is a Logic Probe? A logic probe is a handheld, pen-like electronic test instrument used to diagnose and troubleshoot digital circuits. Unlike a multimeter (which shows a numerical voltage), a logic probe displays the logic state of a circuit node—typically High (1) , Low (0) , or a pulsing signal .

→ Floating pin. Add pull-up/pull-down resistor, or check if IC output is disabled (tri-state). logic probe function

→ Pulse memory mode active and captured a pulse. Reset probe or touch to GND. logic probe function