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Using a JTAG in Linux Driver Debugging - page 27 / 48

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04/16/2008 - Copyright © 2008 The PTR Group Inc.

CELF-2008-SVC-27

What can you do with a JTAG?

Typical JTAG usage includes reflashing boot firmware

Even the really cheap JTAG units can do this

However, it is in the use as a debugging aid that JTAG comes into its own

You can set hardware or software breakpoints and debug in source code

Sophisticated breakpoint strategies and multi-core debugging usually require the more expensive units

JTAG units can also be used to exercise the address bus and peripherals

This is what JTAG was originally designed for

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