W5300 datasheet(17/128 Pages) WIZNET

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1.4 Media Interface Signals

Media(10Mbps/100Mbps) interface signals are used in internal PHY mode (TEST_Mode[3:0] =

“0000”). Refer to “1.2 Configuration Signals”.

Symbol

Type

Description

RXIP

RXIP/RXIN Signal Pair

Differential receive Input signal pair.

Receive data from the media. This signal pair needs 2 termination

resistors 50

Ω(±1%) and 1 capacitor 0.1uF for better impedance

matching,

and

this

resistor/capacitor

pair

located

near

magnetic(transformer). If not used, connect to ground.

RXIN

TXOP

TXOP/TXON Signal Pair

Differential transmit output signal pair.

Transmits data to the media. This signal pair needs 2 termination

resistors 50Ω(±1%) and 1 capacitor 0.1uF for better impedance

matching, and this resistor/capacitor pair should be located near

W5300. If not used, just let them float.

TXON

RSET_BG

Off-chip Resistor

This pin should be pulled-down with 12.3 ㏀±1% resistor.

For the better performance,

Make the length of RXIP/RXIN signal pair (RX) same if possible.

Make the length of TXOP/TXON signal pail (TX) same if possible.

Locate the RXIP and RXIN signal as near as possible.

Locate the TXOP and TXON signal as near as possible.

Locate the RX and TX signal pairs far from noisy signals such as bias resistor or crystal.

For the detailed information refer to “W5100 Layout Guide.pdf”

W5300 Datasheet(PDF) 17 Page - WIZnet Co., Ltd