TLK3114SCZPV datasheet(27/68 Pages) TI1

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3−9

D = Data

T = K29.7

A = K28.3

K = K28.5

E = Error (0xFE)

I = Idle

Running Disparity Error

Detected by /A/ Yields

RXA

...

XAUI

...

XGMII

Running Disparity Error

Detected by /T/ Yields

RXB

...

Running Disparity Error

Detected by /K/ Yields

RXC

...

Running Disparity Error

Detected by /K/ Yields

RXD

...

Figure 3−8. End-of-Packet Error Detection

3.15 Fault Detection and Reporting

The TLK3114SC device detects and reports local faults as well as forwards both local and remote faults as defined

in the IEEE P802.3ae to aid in fault diagnosis. All faults detected by the TLK3114SC device, such as LOS detect, are

reported as local faults to the upper layer protocols, as shown in Table 3−7. Once a local fault is detected in the

TLK3114SC device, bit 7 in MDIO registers 4.1 and 5.1 is set. Fault sequences received by the TLK3114SC device,

either on the transmit data bus or on the high-speed receiver terminals, are forwarded without change to the MDIO

registers in the TLK3114SC device.

The TLK3114SC device reports a fault by outputting a K28.4 (0x9C) on channel A, 0x00 on channels B and C, and

either 0x01 for local faults or 0x02 for remote faults on the receive data terminals for channel D. Forwarding of remote

faults is handled as a normal transmission.

Table 3−7. Local and Remote Fault Sequences

CHANNEL DESCRIPTION

LOCAL FAULT

REMOTE FAULT

RDA[7:0]

Sequence‡

Channel A†

RDA8

Channel A†

RDA9

RDB[7:0]

Channel B

RDB8

Channel B

RDB9

RDC[7:0]

Channel C

RDC8

Channel C

RDC9

RDD[7:0]

Channel D

RDD8

Channel D

RDD9

† Channels A, B, C, and D are equal to the XGMII lanes 0, 1, 2, and 3, respectively.

‡ The sequence character is equal to 0x9C.

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