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DP83TC817S-Q1: Pull Up resistor requirement at RXD[0:3] pin

Part Number: DP83TC817S-Q1

Tool/software:

Hi TI Experts,

We are using part "DP83TC817SRHARQ1" and drive it in RGMII mode. We want to know do we require to add pull up resistor at RX_D[0:3] pin?

Which value we have use ? What is the reason to add pull up resistors.