RTL8201BL 데이터 시트보기 (PDF) - Realtek Semiconductor

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RTL8201BL

REALTEK SINGLE CHIP SINGLE PORT 10/100M FAST ETHERNET PHYCEIVER

Realtek Semiconductor 

3.3V

DVDD33(pin14)

0.1uF

RTL8201B(L)

3.3V-drived

circuit

DVDD33(pin48)

Error Amp

0.1uF

1.2V

bandgap

voltage

2.5V-drived

circuit

RTL8201BL

AVDD33(pin36)

Ferrite Bead

0.1uF

3.3V

MOSFET P

PWFBOUT(pin32)

Ferrite Bead

22uF

0.1uF

PWFBIN(pin8)

0.1uF

7.12 Far End Fault Indication (FEFI)

The MII Reg.1.4 (Remote Fault) is the FEFI bit when 100FX mode is enabled which indicates that FEFI has

been detected. FEFI is an alternative in-band signaling method which is composed of 84 consecutive ‘1’

followed by one ‘0’. From the point of view of the RTL8201BL, when this pattern is detected three times,

Reg.1.4 is set, which means the transmit path (the Remote side’s receive path) has a problem. On the other hand,

the incoming signal failure in causing a link OK will force the RTL8201BL to start sending this pattern, which

in turn causes the remote side to detect a Far-End-Fault. This means that the receive path has a problem from the

point of view of the RTL8201BL. The FEFI mechanism is used only in 100Base-FX mode.

2002-03-29

20

Rev.1.2

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