Patent ID: 8278980

Claim:
A method for a digital phase lock loop high speed bypass mode, the method comprising: providing a first digital phase lock loop in a first clock domain having a high speed clock; providing at least one second digital phase lock loop in a second clock domain, the at least one second digital phase lock loop having a first glitchless multiplexer having the high speed clock as one input and a low speed system reference clock as another input and a second glitchless multiplexer having a first output of the first glitchless multiplexer as a first input and a synthesized clock from a core of the at least one second digital phase lock loop as a second input; controlling the first output of the first glitchless multiplexer according to preselected settings using a device power manager synchronized locally to ensure proper switching; and controlling a second output of the second glitchless multiplexer using a control logic element of the at least one second digital phase lock loop, the second output of the second glitchless multiplexer comprising the synthesized clock when the at least one second digital phase lock loop is in a lock mode and comprising the first output of the first glitchless multiplexer when the at least one second digital phase lock loop is in the digital phase lock loop high speed bypass mode.