XRT86VL34 datasheet(97/156 Pages) EXAR

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XRT86VL34

REV. V1.2.0

QUAD T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION

TABLE 80: ALARM & ERROR INTERRUPT STATUS REGISTER (AEISR)

HEX ADDRESS: 0XnB02

BIT

FUNCTION

TYPE

DEFAULT

DESCRIPTION-OPERATION

Rx OOF

State

Receive Out of Frame Defect State

This READ-ONLY bit indicates whether or not the Receive T1 Framer block is

currently declaring the “Out of Frame” defect condition within the incoming T1

data-stream, as described below.

Out of Frame defect condition is declared when “TOLR” out of “RANG” errors in

the framing bit pattern is detected. (Register 0xn10B)

0 – The Receive T1 Framer block is NOT currently declaring the “Out of Frame”

defect condition.

1 – The Receive T1 Framer block is currently declaring the “Out of Frame” defect

condition.

RxAIS State

Receive Alarm Indication Status Defect State

This READ-ONLY bit indicates whether or not the Receive T1 Framer block is

currently declaring the AIS defect condition within the incoming T1 data-stream,

as described below.

AIS defect is declared when AIS condition persists for 42 milliseconds. AIS defect

is cleared when AIS condition is absent for 42 milliseconds.

0 – The Receive T1 Framer block is NOT currently declaring the AIS defect con-

dition.

1 – The Receive T1 Framer block is currently declaring the AIS defect condition.

RxYEL

State

Receive Yellow Alarm State

This READ-ONLY bit indicates whether or not the Receive T1 Framer block is

currently declaring the Yellow Alarm condition within the incoming T1 data-

stream, as described below.

Yellow alarm or Remote Alarm Indication (RAI) is declared when RAI condition

persists for 900 milliseconds. Yellow alarm or RAI is cleared immediately when

RAI condition is absent even if the T1 Framer is receiving T1 Idle or RAI-CI signa-

tures in ESF mode.

0 – The Receive T1 Framer block is NOT currently declaring the Yellow Alarm

condition.

1 – The Receive T1 Framer block is currently declaring the Yellow Alarm condi-

tion.

LOS_State

Framer Receive Loss of Signal (LOS) State

This READ-ONLY bit indicates whether or not the Receive T1 framer is currently

declaring the Loss of Signal (LOS) condition within the incoming T1 data-stream,

as described below

LOS defect is declared when LOS condition persists for 175 consecutive bits.

LOS defect is cleared when LOS condition is absent or when the received signal

reaches a 12.5% ones density for 175 consecutive bits.

0 = The Receive T1 Framer block is NOT currently declaring the Loss of Signal

(LOS) condition.

1 = The Receive T1 Framer block is currently declaring the Loss of Signal (LOS)

condition.

LCV Int

Status

RUR/

Line Code Violation Interrupt Status.

This Reset-Upon-Read bit field indicates whether or not the Receive T1 LIU block

has detected a Line Code Violation interrupt since the last read of this register.

0 = Indicates no Line Code Violation have occurred since the last read of this reg-

ister.

1 = Indicates one or more Line Code Violation interrupt has occurred since the

last read of this register.

XRT86VL34 Datasheet(PDF) 97 Page - Exar Corporation

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