Arm trace technical specification
When using the J-Trace PRO as a debugging tool it is crucial for a successful session that the trace data output by the microcontroller is meeting specific timing requirements. The trace clock speed (TRACECLK) is on most microcontrollers directly dependent on the CPU clock speed and is usually half of the CPU clock speed.
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Arm trace timing requirements
Arm defines the trace timing requirements as follows:
Note: J-Trace PRO has been designed to work with min. 1 ns ts and min. 1 ns th.Signal name | Description | Value |
---|---|---|
twl | TRACECLK LOW pulse width | Min. 2 ns |
twh | TRACECLK HIGH pulse width | Min. 2 ns |
tr/tf | Clock and data rise/fall time | Max. 3 ns |
ts | Data setup time | Min. 3 ns |
th | Data hold time | Min. 2 ns |