SparkFun Forums

[joni]

Hello

Does anybody know how I can apply the data at the MOSI befor the positive edge from the clock? If I scale the MOSI and the Clock I see that the data on MOSI apply a little bit after the positive edge of Clock. But I have to apply the data on MOSI at min. 2ns befor the pos. edge of the Clock?
Does anybody know how I can set any settings on the 18F458 for this?
Thank you!

[jasonharper]

If the data needs to be stable during the positive edge of the clock, then you want it to change at the preceeding negative edge. Either CKP=1/CKE=0 or CKP=0/CKE=1 will accomplish this, differing only in the idle state of the clock line (which may or may not matter, depending on the device you're talking to).

[joni]

Yes that was the problem. Thank you very much!!! It works now!
Best
Joni