Automatic clock frequency acquisition

摘要: A system and method are provided for automatically acquiring a serial data stream clock. The receives with an unknown clock frequency coarsely determines the frequency. is determined by (initially) selecting high first reference (Fref1), counting number of transitions in time segment at plurality sample frequencies equal to Fref1/n, where n integer ≧1. count each sampling compared Fref1 (n=1). Next, highest (n=x) determined, which has lower than Fref1, coarse set Fc1=Fref1/(x−1).