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IMX6DL JTAG and Trace line clarification

Question asked by Bryan Crouse on May 11, 2017
Latest reply on May 17, 2017 by Yuri Muhin


I will be using Lauterbach Trace32 that supports both JTAG and Trace debugging.  This debugger uses an ARM MIPI-38 to connect to the trace/JTAG lines or it can use both a MIPI-38 and separate JTAG connector for debugging and tracing.


My question is on the following debug lines:





I am not sure how these should be connected in hardware.  The documentation is not clear on what is needed.  I see some implementations where JTAG_DE_B is connected to the debugger DBGRQ pin and some were JTAG_DE_B is permanently pulled high.  What is the recommended practice?


Also, do ARM_EVENTI and ARM_EVENTO need to be connected?  Pulled high, low, left floating?