Adafruit JTAGulator by Grand Idea Studio

On-chip debug (OCD) interfaces offer chip-level control over a target device, enabling engineers and researchers to extract program code, modify memory, or adjust device operations dynamically.For those dealing with complex devices, locating OCD connections can be time-consuming and sometimes requires device alteration. The JTAGulator addresses this challenge by helping you identify OCD connections via test points, vias, or component pads seamlessly.This open-source hardware tool has 24 I/O channels with input protection circuitry for enhanced safety. It features adjustable target voltages ranging from 1.2V to 3.3V and supports JTAG/IEEE 1149.1 and UART/asynchronous serial interfaces. Connect directly to a host computer via its USB interface for efficient operations.