JTAGulator by Grand Idea Studio

On - chip debug (OCD) interfaces offer chip - level control of a target device. They're a key way for engineers, researchers, and hackers to extract program code or data, change memory contents, or control device operation in real - time. Finding available OCD connections manually can be tough and time - consuming, especially for complex devices, and might even need device damage or modification. The JTAGulator is an awesome open - source hardware tool. It helps you quickly find OCD connections from test points, vias, or component pads on a target device. This is a top - notch JTAG reverse - engineering tool. Be cautious when using it and pick the right voltages to prevent damage. Module Highlights: 24 I/O channels with input protection circuitry; Adjustable target voltage from 1.2V to 3.3V for level translation; Supports JTAG/IEEE 1149.1 and UART/asynchronous serial target interfaces; Has a USB interface for direct connection to your host computer.

Using the JTAGulator is quite straightforward. First, connect it to your host computer via the USB interface. Then, start looking for OCD connections on the target device from test points, vias, or component pads. When using, always be careful to select the correct voltage between 1.2V and 3.3V. This helps avoid any damage to the tool. Since it's a high - end tool, don't be too rough with it. As for maintenance, keep it in a dry and clean place. If there's dust on it, use a soft, dry cloth to gently wipe it. Also, make sure the input protection circuitry on the 24 I/O channels isn't damaged during use.