Previous article, introduced the JTAG boundary scan application based on STM32F103, demonstrated the application of TopJTAG Probe software, and the basic functions of boundary scan. This article introduces the boundary scan application based on Xilinx FPGA, which is almost the same. 1. Obtain the Chip’s BSDL File The method of obtaining the BSDL file for … Read more
Basic structure of JTAG: Standard Ports: TCK (Test Clock) – This signal synchronizes the operation of the internal state machine. TMS (Test Mode Select) – This signal samples at the rising edge of TCK to determine the next state. TDI (Test Data Input) – This signal represents the data for the device under test or … Read more
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
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
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
Introduction to JTAG JTAG (Joint Test Action Group) is an international standard testing protocol (IEEE 1149.1 compliant), primarily used for internal testing of chips. Most advanced devices today support the JTAG protocol, such as DSPs and FPGAs. The standard JTAG interface consists of 4 lines: TMS, TCK, TDI, and TDO, which correspond to mode selection, … Read more
Debugging chips relies heavily on the JTAG interface. Downloading and debugging programs must be accomplished through the JTAG interface. Today, I learned some basic principles and working processes of the JTAG interface, and I will summarize them briefly. The JTAG interface is an international standard testing protocol, originally initiated by several electronic device manufacturers who … Read more
Interface Name: JTAG Full English Name: Joint Test Action Group Chinese: 联合测试工作组 Standard Number: IEEE1149.1-1990/IEEE1149.1a-1993 Standard Maintenance: IEEE Current Specification: www.IEEE.org Latest Version: IEEE1149.1-2013 Standard Test Access Port and Boundary-Scan Architecture Effective Date: 2013 Next Version: TBD Description: JTAG is an international standard testing protocol (IEEE 1149.1 compatible), primarily used for internal testing of chips. … Read more
Original: Wolonghui Wolong Village Master Previously, some netizens asked what the JTAG principle is? Today, I will briefly explain it. JTAG is a debugging, testing, and online programming interface. JTAG (Joint Test Action Group) JTAG is an embedded debugging technology used to test chips. Once the circuit board is soldered, how can we ensure that … Read more