Hardware Introduction Currently, there are mainly two types of AMD-Xilinx FPGA-JTAG in China: one is the official development board: The second is the newly launched smart lynq (faster and more functional): The price discourages a large number of people: The second type is domestic, with various kinds that I won’t show images of. Domestic JTAG … Read more
1. Basic Knowledge of JTAG JTAG stands for Joint Test Action Group and is the IEEE 1149.1 standard. The advantage of using JTAG is that it allows integrated circuits to be tested on a PCB through boundary scan. In the ARM7TDMI processor, JTAG can directly control ARM’s internal bus, I/O ports, and other information 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
Follow+Star Public Account, don’t miss out on exciting content Author | strongerHuang WeChat Public Account | Embedded Column As an embedded engineer, you should know about download debuggers, but do you really understand the meaning and differences of the SWD and JTAG interfaces? Embedded Column 1 What is a Download Debugger In simple terms, a … Read more
As an embedded engineer, everyone should know about download debuggers. But do you really understand the meaning and differences of the SWD and JTAG interfaces? What is a Download Debugger? In simple terms, a download debugger is a device that converts commands sent from a PC (e.g., via USB protocol) into a language understood by … Read more
As an embedded engineer, you should know about download debuggers, but do you really understand the meaning and differences between the SWD and JTAG interfaces? 01 What is a Download Debugger In simple terms, a download debugger is a device that converts commands sent from a PC (for example, via USB protocol) into a language … Read more
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Do you understand the meaning of each JTAG pin? JTAG has 10-pin, 14-pin, and 20-pin versions. Although the number of pins and the arrangement order differ, some of the pins are the same. The definitions of each pin are as follows. 1. Pin Definitions Test Clock Input (TCK) —– Required 1 TCK is a mandatory … Read more
Today, I bring you an ultra low-cost FPGA JTAG solution, where the hardware core is based on the Raspberry Pi Pico. Using related chips to create your own JTAG is very cheap; the RP2040 is priced at only 4 yuan on Taobao, making the production cost extremely low. Of course, the cost of using the … Read more
1. JTAG Protocol JTAG (Joint Test Action Group) is an international standard testing protocol (IEEE 1149.1 compatible), primarily used for internal chip testing. Most advanced devices today support the JTAG protocol, such as ARM, DSP, and FPGA devices. The standard JTAG interface consists of 4 lines: TMS, TCK, TDI, and TDO, which correspond to test … Read more