OnTable 22 Sheet 33 of the MPC data sheet Rev 4 three external bus frequencies are shown.
1) Do the 3 frequencies correspond to the 3 different speed grades the MPC5554 is available in? For example if I have a 132 MHz part (MPC5554MZP132) and have the external bus frequency running at 33 MHz would I use the delays in the 66 MHz column not the delays in the 40 MHz column?
2) The delay values given in the table are with DSC = 0b10 do you have maximum delay values when DSC = 0b11?
David. thanks for you reply. I read the document you referenced I believe section 2.2 of the documents applies to my use since I am using a 132 MHz speed grade part with SIU_ECCR[EBDF} set for Divide by 4, is this correct? Is section 2.1 referring to a design using a 80 MHz speed grade part with the system clock equal to 66 MHz and SIU_ECCR[EBDF} set for Divide by 2 for a CLKOUT = 33 MHz? If this is not the case section 2.2 appears to be in conflict with section 2.1.
Section 2.1 describes consequences of changing of system clock and yes, it applies to setting with SIU_ECCR[EBDF} set for Divide by 2.
Section 2.2 describes consequences of changing CLKOUT divider to ‘Divide by 4’. - if this is your case, you are looking at the column 66MHz.
1) See following document, section 2:
https://community.nxp.com/docs/DOC-101725
2) Unfortunately we don't have such specification.