Welcome FPGA engineers to join the official WeChat technical group. Clickthe blue textto follow us 1. What is JTAG: Joint Test Action Group. JTAG is an IEEE standard designed to solve board-level issues, developed in the 1980s. Today, JTAG is used for programming, debugging, and probing ports. Of course, the original use was boundary testing. … Read more
In the process of FPGA development and learning, a key step is downloading to the board. Achieving hardware “hard presence” is very important, and generally, the JTAG port is more commonly used. Therefore, I believe that some experts must have encountered issues with the JTAG port becoming unresponsive or damaged and unable to be used. … Read more
JTAG is an IEEE standard (1149.1) developed in the 1980s to address manufacturing issues in electronic boards. Today, it can be used for programming, debugging, and probing ports. But first, let’s look at JTAG’s original purpose: boundary testing. Boundary Testing This is a simple electronic board (also known as a “Printed Circuit Board” or “PCB”) … Read more
Welcome to the world of FPGA technology. In this vast realm, meeting is fate. You can follow FPGA technology to gain other resources of interest in the “adventurous journey” and “heroic deeds” sections, or share a drink and chat. “Cooking wine and chatting” leads to the IC technology circle, where there are nearly 50 IC … Read more
This article introduces four types of JTAG data registers, namely: Boundary Scan Register (BSR) Bypass Register (BR) Device ID Register User Data Register(s) Before discussing the boundary scan register, it’s important to first understand why we need a boundary scan register. Figure 1: Schematic diagram of three chips on a PCB and their interconnections Assume … Read more
Welcome FPGA engineers to join the official WeChat technical group Clickthe blue textto follow our FPGA home – the best and largest pure FPGA engineer community in China 01 Introduction to JTAG JTAG (Joint Test Action Group) is an interface, and a group called the JTAG group was established for this interface in 1985. In … Read more
He is the “Little Horse” mentioned by TK at the GeekPwn conference in 2015, another alchemist who intruded into the security circle (originally a chemistry major) – HyperChem. After a few years of experience in software unpacking, he is currently focusing on embedded security and firmware reverse engineering. This researcher from Tencent Security’s Xuanwu Lab, … Read more
Author: Hcamael@Zhidao Chuangyu 404 Laboratory Date: October 21, 2019 Recently, while working on a router, I accidentally bricked the CFE and discovered that I could recover it through JTAG, so I did some research on JTAG. Initially, I only wanted to recover the brick, without any intention of deep research. Brick Recovery Attempt A Singapore … Read more
Follow our public account for timely updates on new articles. Introduction: Engineers engaged in hardware, embedded systems, or chip-related fields are likely familiar with JTAG. JTAG primarily has three main uses: Testing and Diagnosis: Initially, the main purpose of JTAG was for testing and diagnosing integrated circuits, used to detect and repair defects in the … Read more
Wu Jianying Microcontroller Development Board Address Shop:【Wu Jianying’s Shop】 Address:【https://item.taobao.com/item.htm?_u=ukgdp5a7629&id=524088004171】 This article contains two parts: 1) Continuing the discussion on the TI DSP connection issues; 2) Briefly mentioning the Xilinx FPGA JTAG connection issues. 1. Why Can’t the TI DSP Connect? Half a year ago, I published a blog post titled “Why Can’t the DSP … Read more