CS8952 datasheet(45/82 Pages) CIRRUS

45 / 82 page

CS8952

CrystalLAN™ 100BASE-X and 10BASE-T Transceiver

6.10

Interrupt Status Register - Address 11h

This register indicates which event(s) caused an interrupt event on the MII_IRQ pin. All bits are self-

clearing, and will thus be cleared upon readout.

CIM Link

Unstable

Link Status

Change

Descrambler

Lock Change

Premature End

Error

DCR

Rollover

FCCR

Rollover

RECR

Rollover

Remote

Loopback

Fault

765

4321

Reset

Complete

Jabber

Detect

Auto-Neg

Complete

Parallel

Detection Fault

Parallel

Fail

Remote

Fault

Page

Received

Reserved

BIT

NAME

TYPE

RESET

DESCRIPTION

CIM Link Unstable

Read Only

When set, this bit indicates that an unstable link con-

dition was detected by the Carrier Integrity Monitor

function.

Link Status Change Read Only

When set, this bit indicates that a change has

occurred to the status of the link. The Self Status

current status of the link.

Descrambler Lock

Change

Read Only

When set, this bit indicates that a change has

occurred in the status of the descrambler. The Self

Status Register (address 19h) may be read to deter-

mine the current status of the scrambler lock.

Premature End

Error

Read Only

This bit is set when a premature end of frame is

detected for 100 Mb/s operation. A premature end is

defined as two consecutive IDLE patterns detected in

a frame prior to the End of Stream Delimiter.

DCR Rollover

Read Only

This bit is set when the MSB of the Disconnect Count

provide ample warning to the management layer so

that the DCR may be read before rolling over.

FCCR Rollover

Read Only

This bit is set when the MSB of the False Carrier

Count Register (address 13h) becomes set. This

should provide ample warning to the management

layer so that the FCCR may be read before saturat-

ing.

RECR Rollover

Read Only

This bit is set when the MSB of the Receive Error

Count Register (address 15h) becomes set. This

should provide ample warning to the management

layer so that the RECR may be read before rolling

over.

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