Hi Leo
Thanks for your effort to reply to me.
I just followed your link and download the LPC55S36-EVK schematic revision D
I did found the R554 resistor located at left side of R421 on schematic drawing.
But I found the actual EVK doesn't exit R554 beside R421.
By the way , my EVK is NXP LPCXpresso55S36 B.V. version .
My Installed SDK version is 2.14.0(731 2023-07031), Manifest Vesion is 3.13.0.
So help to check if there is a fault. Thank you very much.