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Problem of Start-up Sequence

Question asked by myunghoonji on Mar 6, 2014
Latest reply on Mar 10, 2014 by Jose Alberto Reyes Morales


I designed my board which is based on SABRE-SDB.

I saw the this problem both on my board and on SABRE-SDB.

I have a problem that SABRE-SDB is not progressed on a normal Start-up Sequence as Figure 6. Default Start-up Sequence in PF0100 datasheet at times.

I captured in normal Start-up and in unusual Start-up using oscilloscope.

At this time,it is turned on the D1(LED), but is turned off the D2(LED) on SABRE-SDB.

Please let me know what is the problem? and How to do debug?


                                                                    < Normal Start-up >



                                                            < Unusual Start-up >