9883 datasheet(30/56 Pages) INTEL

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LXT9883/9863 — Advanced 10/100 Unmanaged Repeater

Datasheet

Document #: 249115

Revision #: 003

Rev. Date: 08/07/01

Figure 8. IRB Block Diagram

Table 15. Cascading and Stacking Connections

Signal Type

Connections Between Devices

(Cascading)

Connections Between Boards

(Stacking)

Local

Connect all.

Do not connect.

Stack

For devices with FPS = 0, pull-up at each device

and do not interconnect.

Connect devices with FPS = 0 between boards.

Use one pull-up resistor per stack.

Full

Connect all.

Connect using buffers.

Digital IRB signals include IRnDAT, IRnCOL, IR10COLBP, IRnENA and IRnCLK.

Local Analog IRB signal: IRnCFS.

Inter-Board Analog IRB signal: IRnCFSBP.

This diagram shows a single IRB. The LXT98x3 actually has two independent IRBs, one per speed/segment.

’245

FPS = 0

FPS = 1

Hub Board 1

Digital IRB Signals

Analog IRB Signals

IRDEN

HOLDCOL

’245

FPS = 0

FPS = 1

Hub Board 2

Digital IRB Signals

Analog IRB Signals

IRDEN

HOLDCOL

’245

FPS = 0

FPS = 1

Hub Board n

Digital IRB Signals

Analog IRB Signals

IRDEN

HOLDCOL

HOLDCOL is used on the 10Mbps IRB Only.

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