06.08.2020 19:51, Sowjanya Komatineni пишет: >>>> What about to add 72us delay to the end of start_calibration() in order >>>> to ensure that FSM is finished before LP-11? >>> Why we should add 72uS in start_calibration() when can use same >>> finish_calibration() for both pass/fail cases? >>> >>> Only timing loose we see is in case of failure we still wait for 250ms >>> and as this is failing case I hope should be ok. >>> >> You said that calibration settings are applied to pads on LP-11, but if >> LP-11 happens before FSM is finished, then what values will be applied >> if any? > > No calibration logic will check for LP-11 only after finishing > calibration sequence codes. > > After that if it sees LP-11, it will apply results to pads and DONE bit > will then be set to 1 indication pad results update. Are you sure that HW doesn't use level-triggered logic for LP-11 signal? > Unfortunately like I said we don't have status indication for > calibrating finished before waiting for LP-11. This is not a problem if hardware can cope with LP-11 happened at the time of calibration. If hardware can't cope with that, then somethings needs to be done about it.
