Hi team,
My customer use WL1837MOD. They find out inside SWRS170J, page 36, there is a recommendation as below. Could you help provide the trace length tolerance between those SDIO traces ? Thank you.
"every trace length must be the same as the others"
Hey Jerry,
Ultimately, the tolerance will depend on the system. The SDIO interface can operate at different speeds which will vary the acceptable length mismatch. I recommend looking up a calculator for propagation delay over a microstrip or stripline (they will be different). This will be how you can compare the prop delay differences between the SDIO signal traces and make sure that you don't violate timing characteristics of the SDIO interface:
The key parameters would be set up and hold time to ensure the data is sampled correctly.
