AC208-DS04-405-R datasheet(22/58 Pages) BOARDCOM

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AC208

Preliminary Data Sheet

07/08/02

B roa dcom

Page 14 Pin Descriptions

Document

AC208-DS04-405-R

Table 7: 100 Mbps Internal Repeater

Pin Name

Pin #

Type

Description

M100COL_LOCAL*

I/O, U

100M Local Collision. Input when ChipID = 00. Active low to

indicate collision on all other ChipIds.

M100ACTO*

O, U

Output to ChipID=00 for ChipID

≠00 to signal local activity. This

signal is pure combinational logic and is not in sync with any

clock source. (Refer to next 3 signals).

M100ACTI_0*

(M100ACTO*)

I,U

Input for ChipID=00 from ChipID

≠00 M100ACTO* pins to

indicate activities. Open on all other ChipIDs.

M100ACTI_1*

I,U

Connected from ChipID=00 to ChipID=10 M100ACTO* to sense

activities. Open on all other ChipIDs.

M100ACTI_2*

I,U

Connected from ChipID=00 to ChipID=11 M100ACTO* to sense

activities. Open on all other ChipIDs.

M100COL_SYS*

I/O,U

ChipID=00 drives this pin the same as 100COLBP* to indicate

local collision.

M100CRS_SYS*

I/O,U

ChipID=00 drives this pin the same as 100CRSBP* to indicate

local activity.

MS100D4

MS100D3

MS100D2

MS100D1

MS100D0

I/O,D

Multiple/Stacked Data Group. Transmit and receive data in de-

scrambled 5B data groups for multiple devices. Data is sampled

at the rising edge of MS100D_CLK and driven out on falling edge

of MS100D_CLK.

MS100D_EN*

I/O,U

Multiple/Stacked Data Enable. Active-low when data is valid.

Signal is driven out on the falling edge of MS100D_CLK, and

sampled at the rising edge of MS100D_CLK.

MS100D_CLK

I/O, U,

Multiple/Stacked Data Clock. The bi-directional non-continuous

25 MHz recovered clock for synchronizing with MS100D[4:0],

and MS100D_EN*.

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