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Advanced 10/100 Unmanaged Repeater — LXT9883/9863

Datasheet

Document #: 249115

Revision #: 003

Rev. Date: 08/07/01

3.6.6.1

LED Mode 1

Mode 1 operations are described in Table 11.

3.6.6.2

LED Mode 2

Mode 2 operations are described in Table 12.

Table 11. LED Mode 1 Indications

LED

Operating Mode

Hardware Control

Blink

Off

PORTnLED1

10 Mbps operation

Link_OK, not

Port_Partitioned

N/A

Any other state

100 Mbps operation

PORTnLED2

10 Mbps operation

Link_OK,

Port_Partitioned

100 Mbps operation

PORTnLED3

AUTOBLINK active

100M

Link_OK

Not Link_OK

(Fast Blink)

10M Link_OK

AUTOBLINK inactive

N/A

Collision and

Activity LEDs

Any

The collision and activity LEDs are on a Per Segment basis. Pulse

stretchers are used to extend the on-time for the LEDs. For every on-

cycle of the stretched LEDs, an off-cycle, with the same period as the

on-cycle, always follows.

The collision LEDs turn on for approximately 120

µs when the

LXT98x3 detects a collision on the segments. During the time that the

LED is on, any additional collisions are ignored by the collision LED

logic.

The activity LEDs turn on for approximately 4 ms when the LXT98x3

detects any activity on the segments. During the time that the LED is

on any additional activity is ignored by the activity LED logic.

Blink

Off

Global

Fault

Any

Any Port_Partitioned

RPS_Fault and

RPS_Present

N/A

Any other state

RPS Fault

Any

RPS_Present,

RPS_Fault

1. Refer to Table 11: LED Terms, which defines all key terms used in this section.

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