Client Support
The target's JTAG interface is accessed using some JTAG-enabled application and some JTAG adapter hardware. There is a wide range of such hardware, optimized for purposes such as production testing, debugging high speed systems, low cost microcontroller development, and so on. In the same way, the software used to drive such hardware can be quite varied. Software developers mostly use JTAG for debugging and updating firmware.
If you want to acquire a JTAG adapter, you first need to decide what systems it must support. Everything else follows from that, including your software options. Low-end adapters may cost less than $US 50 and have limited hardware and software support. High-end adapters can cost a hundred times as much, including software support, and have corresponding improvements in capability.
Read more about this topic: Joint Test Action Group
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