Difference between revisions of "Trace board design recommendations"

From SEGGER Wiki
Jump to: navigation, search
(Created page with "When designing trace boards additional design considerations need to be taken into account to make sure that a clean and noise free signal can propagate from the target device...")
 
Line 9: Line 9:
 
* Avoid stubs which create parasitic impedance changes and reflection
 
* Avoid stubs which create parasitic impedance changes and reflection
 
* Avoid multi usage of trace pins with other ICs which again will cause unwanted impedance changes and reflection
 
* Avoid multi usage of trace pins with other ICs which again will cause unwanted impedance changes and reflection
  +
* If your trace lanes are not shielded, make sure they do not propagate close to elements which can generate electro-magnetic waves e.g. motors or antennas
   
 
For design reference our [https://www.segger.com/products/debug-probes/j-trace/accessories/trace-reference-boards/overview/ Trace Reference Boards] can be used.
 
For design reference our [https://www.segger.com/products/debug-probes/j-trace/accessories/trace-reference-boards/overview/ Trace Reference Boards] can be used.

Revision as of 10:37, 23 September 2022

When designing trace boards additional design considerations need to be taken into account to make sure that a clean and noise free signal can propagate from the target device to the trace probe.

The most common recommendations are as follows:

  • All trace transmission lines should be as short as possible and have ideally the same length
  • Shielded transmission lines can reduce the impact of crosstalk
  • Impedance matching of the transmission lines can improve the signal quality drastically
  • Serial termination resistors should be considered for long lines transmission lines
  • Do not use any capacitive or inductive elements which are connected to the trace lines e.g. diodes, LEDs, capacitors, inductors etc.
  • Avoid stubs which create parasitic impedance changes and reflection
  • Avoid multi usage of trace pins with other ICs which again will cause unwanted impedance changes and reflection
  • If your trace lanes are not shielded, make sure they do not propagate close to elements which can generate electro-magnetic waves e.g. motors or antennas

For design reference our Trace Reference Boards can be used.