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LXT9883/9863 — Advanced 10/100 Unmanaged Repeater

Datasheet

Document #: 249115

Revision #: 003

Rev. Date: 08/07/01

3.6.2

LED Event Stretching

Short lived LED status events are stretched so they may be observed by the human eye. Refer to the

LED1, 2, 3 Modes section for stretching specifics.

3.6.3

Serial LED Interface

The LXT98x3 provides a serial interface to drive additional LEDs via external 8-bit Serial-to-

Parallel converters. A maximum of 30 LEDs can be driven, using four S/P devices. Collision10/

100, Activity10/100 status indications are output on multiplexed configuration pins and are

duplicated on the Serial Port (see "LED Pins Multiplexed with Configuration Inputs” on page 39.).

3.6.4

Serial Shifting

Figure 5 shows the Serial LED shift loading.

Figure 5. Serial LED Shift Loading

74X164

LXT98x3

MII

Misc

ACT10

ACT100

MII

1, 2, 3

Misc

Activity

10M

Activity

100M

Shift Order

MII1 LED1

Collision 10M

ACTG8

MII1 LED2

Collision 100M

ACTG7

MII1 LED3

Not Used

ACTG6

MII2 LED1

Activity 10M

ACTG5

MII2 LED2

Activity 100M

ACTG4

MI2 LED3

Global Fault

ACTG3

Not Used

ACTG2

Not Used

RPS Fault

ACTG1

30 LEDs

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