SHARC 214xx ASRC behavior with input clocks


I have been using ASRC with SHARC 214xxs.  I am so accustomed to using the asrc with a constant bit clock and frame sync on the inputs

as well as constant bit clocks and frame syncs on the outputs.  I am coming across a device that would provide me a burst of clocks (bick and fs)

only when there is valid audio.  I intend to connect these to the SHARC input side of the ASRC. 

Here are my questions:

1)  What would the ASRC do if it sees non continuous clocks?

2) The device I am mentioning can be configured to have the frame sync constant however, not the bit clock.  What will the ASRC do 

with this scenario?  Is the ASRC decision tree dependent on the frame syncs ( in and out) only?  Or do the bit clocks should also be present?

For questions 1 and 2, I will have the ASRC output clocks to be constant synchronous clocks.

Thank you in advance. 


  • 0
    •  Analog Employees 
    on Nov 20, 2019 5:34 AM over 1 year ago

    Hi Emilson,

    Regarding "Question 1&2"
    >>ASRC with SHARC 214xxs doesn't support non continuous clock and it has constant frame sync and bit clock.
    ASRC Supports left-justified, I2S, right-justified (16-,18-, 20-, 24-bits),TDM serial port modes and these modes doesn't support gated clock.

    In order to assist you better on this , Can you please detail your application.

    Anand Selvaraj