• AMBA 3 APB PENABLE wrt PREADY

    Hi,

       I need a clarification on PENABLE with respect to PREADY. 
       1) Can pready remain high for more than one cycle?
       2) Does PENABLE from the master has to look for PREADY going low to deassert or it should go low the cycle next to the assertion of PREADY…

  • barrier instructions Vs. barrier transactions

    I have several questions about barrier operarions.

    1. how to operate barrier instructions ISB, DMB, DSB in ACE?

         a) when ISB is executed, what are the signal values about barrier transaction  (AxBAR, AxSNOOP , AxDOMAIN)?

       …