This solution matches the skew between TDI/TMS and TCK signals to achieve high JTAG frequencies.
Again, place the buffers and series termination resistors as close as possible to the T-junction of the TMS
and TCK signals.
Note
• For added noise rejection, Schmitt buffers can be used instead of standard buffers.
• Arm recommends you use buffers with a drive strength of 24mA or above.
• For any buffered signal, place the signal pull-up or pull-down resistor at the input-side of the buffer.
For guidance on selecting series termination resistors, see Series termination on page 3-54.
3 Target board design
3.2 JTAG port buffering
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