DP83955AV datasheet(21/54 Pages) NSC

21 / 54 page

50 Functional Description (Continued)

ACKI

Function

Input signal to the PSM arbitration

chain This chain is employed to

identify

PORT N and PORT M

Note

A LERIC which contains

PORT N or

PORT M may be identified by its

ACKO signal being low when its ACKI

input is high

Conditions

Not Applicable

required for a

LERIC to drive

this signal

LERIC

This is dependent upon the method

used to cascade LERICs described in

Receiving the

Section 53

Signal

ACKO

Function

Output signal from the PSM arbitration

chain

Conditions

This is dependent upon the method

used to cascade LERICs described in

required for a

Section 53

LERIC to drive

this signal

LERIC

Not Applicable

Receiving the

Signal

ACTN

Function

This signal denotes there is activity on

PORT N or PORT M

Conditions

A LERIC must contain

PORT N

required for a

PORT M

LERIC to drive

Note

Although this signal normally has only

one source asserting the signal active

this signal

it is used in a wired-OR configuration

LERIC

The signal is monitored by all LERICs

in the repeater system

Receiving the

Signal

ANYXN

Function

This signal denotes that a repeater

port that is not

Port N or Port M is

experiencing a collision

Conditions

Any LERIC which satisifies the above

condition

required for a

Note

This bus line is used in a wired-OR

LERIC to drive

configuration

this signal

LERIC

The signal is monitored by all LERICs

in the repeater system

Receiving the

Signal

COLN

Function

Denotes

PORT N or PORT M is

experiencing a collision

Conditions

A LERIC must contain

PORT N

required for a

PORT M

LERIC to drive

this signal

LERIC

The Signal is monitored by all other

LERICs in the repeater system

Receiving the

Signal

IRE

Function

This signal acts as an activity framing

signal for the IRC and IRD signals

Conditions

A LERIC must contain

PORT N

required for a

LERIC to drive

this signal

LERIC

The Signal is monitored by all other

LERICs in the repeater system

Receiving the

Signal

IRD

Function

Decoded serial data in NRZ format

received from the network segment

attached to

PORT N

Conditions

A LERIC must contain

PORT N

required for a

LERIC to drive

this signal

LERIC

The signal is monitored by all other

LERICs in the repeater system

Receiving the

Signal

IRC

Function

Clock signal associated with IRD and

IRE

Conditions

A LERIC must contain

PORT N

required for a

LERIC to drive

this signal

LERIC

The signal is monitored by all other

LERICs in the repeater system

Receiving the

Signal

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