Hello,
The status signal of "DPLLx reference switchover event" goes HIGH when reference clock switching occur, right?
When does the status signal get back LOW?
Best regards,
Katsu
Hi Katsu,
Yes, that is correct, "DPLLx switchover event" does go high during a switchover, however this will be a pulse and a very small window. The best signal to monitor to confirm a switchover has indeed taken place are the following:
- REFSWITCHx_INTR: should go high after switchover an remain latched until cleared. Make sure int_en is on. And secondly the POL bit needs to be enabled for it to be
- DPLL_REFSEL_STAT: will show which reference DPLL has selected
- DPLL REFx Selected on status pin or GPIO pin: will go high for which ever reference is currently selected if the "x" equals that reference number
I have a picture of these from the GUI below.
Thanks and regards,
Amin
Once switchover happens, Switchover_INTR will be triggered and remained latched until cleared (unlike REFswitch which would have to be perfectly captured / readback at the right moment)
DPLLx_REFSEL_STAT will let you know what reference is selected - therefore letting you know whether DPLL has switched reference
DPLLx_REFx_SELECT - will be high when DPLL has selected that reference
