Power sequencing for LPC4367

[akhilesh_sreedh]

Hello,

The datasheet for LPC4367 recommends tying VDDREG and VDDIO pins to ensure same ramp-up time. Is there any recommended value for the ramp-up time? Also, do the other power-domains like the RTC domain, USB power domain require any power sequencing. 

I apologize if this as been asked before. I couldn't find any matching questions so asking the same.  

[soledad]

Hi,

Please check the user manual for boot process timing (pages 66,67)

https://www.nxp.com/docs/en/user-guide/UM10503.pdf 

Have a great day,
Sol

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[akhilesh_sreedh]

Hi soledad,

My question was regarding the supply ramp-up time and the power sequencing mechanism of LPC4367. I have referred the pages 66 and 67 of UM10503. This document doesn't mention any recommended time for supply ramp-up. Is there a recommended time which is required for the supply to ramp-up?