Joint Test Action Group (JTAG)
Joint Test Action Group (JTAG)
JTAG (Joint Test Action Group) is often used to program and debug microcontrollers, embedded systems, FPGAs, and much more. It has a wide range of capabilities and is supported by a large amount of hardware. It's extremely flexible and can be used for many other purposes. When using the JTAG analyzer, make sure you are sampling at least 4 times faster than the clock speed to accurately capture the data.
Top Resources
What Logic Decodes
TAP state machine states
Data from TDI data line
Data from TDO data line
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