May 6, 2021
Introduction Welcome back to our introduction to hardware hacking series! In this post we will be covering the Joint Test Action Group (JTAG) interface, its state machine, pinout, and electrical characteristics. This is the first part of a multi-part series about JTAG. In this first installment, we provide background and information to get started working with JTAG. In our next post, we will share a teardown of a TP-LINK AC1750 to demonstrate how to identify and verify a pinout for JTAG.