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JTAG（JointTest ActionGroup）是一个接口，为了这个接口成立了一个小组叫JTAG小组，它成立于1985年。在1990年IEEE觉得一切妥当，于是发布了IEEE Standard 1149.1-1990，并命名为Standard Test Access Port and Boundary-ScanArchitecture，这就是大名鼎鼎的JTAG了。 2.

JTAG（Joint Test Action Group，联合测试行动小组）是一种国际标准测试协议（IEEE 1149.1兼容），主要用于芯片内部测试。现在多数的高级器件都支持JTAG协议，如ARM、DSP、FPGA器件等。标准的JTAG接口是4线：TMS、 TCK、TDI、TDO，分别为模式选择、时钟、数据输入和数据 ...

If you’re reading Hackaday, you’ve almost certainly heard of JTAG. There’s an excellent chance you’ve even used it once or twice to reflash an unruly piece of hardware. But how well do you actually ...

If not, it might be because you haven’t mastered the basics of JTAG and learned how to dump, or snarf, the firmware of an embedded device. This JTAG primer will get you up to snuff on snarfing, and ...

JTAG (jay-tag) is one of the engineering acronyms that has been transformed into a noun, although arguably it is not so popular as RAM, or CPU. IEEE Std 1149.1-1990 IEEE Standard Test Access Port and ...

In recent years, boundary scan has transformed itself. JTAG started more than a decade ago as a simple structural interconnect test technology. It now is a foundational embedded infrastructure capable ...

Samtec is releasing a variety of board-level and cable connector systems for JTAG applications, which are currently shipping in volume quantities, says the interconnect manufacturer. The Samtec JTAG ...

It is fairly common knowledge that hacking into today’s intelligent Internet devices is child’s play in most cases. The main reason is that the devices have little or no innate security designed in.

When developing a new board, many problems can occur. Bare, unpopulated boards can have shorts and opens that can cause circuits not to work or software to fail once the board is populated. After ...