Power Sequence for PSoC 6 – KBA227565

Version 5

    Author: LinglingG_46           Version: **

    Question:
    Is there a power sequence required for different supplies such as VDDD, VBACKUP, VDDIO, and VDDA in PSoC® 6?

    Answer:
    No, power sequence is not required.

     

    VDDD, VBACKUP, VDDIO, and VDDA do not have any sequencing limitation and can establish in any order. The presence of VDDA without VDD or VDDD can cause some leakage from VDDA. However, VDDA will not drive any analog or digital output.  All VDDA pins in packages that offer multiple VDDA supply pins must be shorted externally (on the PCB). Note that the system will not exit reset until both VDDD and VDDA are established. However, the system will not wait for other supplies to establish.