在FPGA研发及学习过程中，有一个关键步骤就是下板实现，做硬件“硬现”很重要，一般来说用JTAG口比较常见一些，因此相信肯定有些大侠遇到过JTAG口失灵或者损坏无法使用的事情。 最近我就遇到了这类事情，FPGA的JTAG口突然就不能下载程序了，而且这种事情 ...

我是怎么了解到边界扫描的呢？ 这就要从我淘到一块FPGA板卡的事情说起了。 前段时间我在某二手平台上淘了一块FPGA板子，它长这样： 板子的整体尺寸很小巧，和手掌差不多大，外设也很简单： 听卖家介绍说，这是之前挖矿盛行时，定制矿机中的一块HASH算力卡 ...

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 ...

Most complex electronic systems take advantage of the IEEE 1149.1 (JTAG) standard in one way or another. If the system uses complex FPGAs or CPLDs, then they are almost certainly configured using the ...

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 ...

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.