P.Ksagar Posted January 11 Report Share Posted January 11 Hello All, I have some doubts related to the relationship between PSEL and PENABLE signals in the APB Protocol. The specification informs that: The PENABLE signal is asserted the following clock after PSEL is asserted and de-asserted after a transfer takes place. I would like to understand about the following conditions: 1) Can PENABLE toggle while PSEL is de-asserted? 2) Can PENABLE be asserted in the IDLE and/or SETUP phase? 3) Can PSEL go log in to the SETUP phase? 4) What happens when PSEL is asserted high in the ACCESS phase and PENABLE is not de-asserted? Thanks Quote Link to comment Share on other sites More sharing options...
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