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AM62A7: Custom Hardware Design, Power Sequencing for VDDSHV4, VDDSHV5, and VDDSHV6

Josh Henderson
Prodigy 10 points

Part Number: AM62A7

Tool/software:

I'm currently reviewing the power sequencing requirements for the AM62A7.  Reference Section 6.12.2.2 in the device datasheet.  Table 6-5, Note 7 and Table 6-6, Note 3 both state: "VDDSHV4, VDDSHV5, and VDDSHV6 were designed to support power-up, power-down, or dynamic voltage change without any dependency on other power rails."

My question is: does the note referenced above imply that one/all of these power rails can be connected to an always-on power source without violating the power sequencing requirements for the device?

  • +1
    TI__Mastermind 27656 points

    Hi,

    Those VDDSHV pins do not have sequence dependencies on other rails but they still need to be part of the SoC power-up/down sequence. AM62A does not have a valid power state where only VDDSHV4, VDDSHV5 or VDDSHV6 stay ON. This would be an unknown state. 

    The CANUART (VDDSHV_CANUART and VDD_CANUART) is the domain that can be connected to always-ON regulators when supporting Partial IO low power mode.   

    Thanks,

    Brenda