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AM625-Q1: Calibration resistor

Part Number: AM625-Q1

Tool/software:

Hi,

On "USB0_RCALIB" net : "An external 499 Ω ±1% resistor must be connected between this pin and VSS" is recommended


1) Could you please explain the use of calibration resistor?
2) Will there be any impact if we change to any standard value("470Ω or 510Ω") with +/-1%." ?

Regards

Soumya