XRT75R03D datasheet(73/134 Pages) EXAR

73 / 134 page

XRT75R03D

THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER

REV. 1.0.2

TABLE 25: SOURCE LEVEL INTERRUPT STATUS REGISTER - CHANNEL 0 ADDRESS LOCATION = 0X02

Channel 1 Address Location = 0x0A

Channel 2 Address Location = 0x12

BIT 7BIT 6BIT 5BIT 4BIT 3BIT 2BIT 1BIT 0

Unused

Change of FL

Condition

Interrupt Status

Ch_n

Change of LOL

Condition

Interrupt Status

Ch_n

Change of LOS

Condition

nterrupt Status

Ch_n

Change of DMO

Condition

Interrupt Status

Ch_n

R/O

RUR

000

BIT NUMBER

NAME

TYPE

DEFAULT

VALUE

DESCRIPTION

7 - 4

Unused

R/O

Change of FL Con-

dition Interrupt Sta-

tus

RUR

Change of FL (FIFO Limit Alarm) Condition Interrupt

Status - Ch 0:

This RESET-upon-READ bit-field indicates whether or not

the Change of FL Condition Interrupt (for Channel 0) has

occurred since the last read of this register.

0 - Indicates that the Change of FL Condition Interrupt has

NOT occurred since the last read of this register.

1 - Indicates that the Change of FL Condition Interrupt has

occurred since the last read of this register.

NOTE: The user can determine the current state of the

FIFO Alarm condition by reading out the contents

of Bit 3 (FL Alarm Declared) within the Alarm

Status Register.

Change of LOL

Condition Interrupt

Status

RUR

Change of Receive LOL (Loss of Lock) Condition Inter-

rupt Status - Ch 0:

This RESET-upon-READ bit-field indicates whether or not

the Change of Receive LOL Condition Interrupt (for Chan-

nel 0) has occurred since the last read of this register.

0 - Indicates that the Change of Receive LOL Condition

Interrupt has NOT occurred since the last read of this reg-

ister.

1 - Indicates that the Change of Receive LOL Condition

Interrupt has occurred since the last read of this register.

NOTE: The user can determine the current state of the

Receive LOL Defect condition by reading out the

contents of Bit 2 (Receive LOL Defect Declared)

within the Alarm Status Register.

XRT75R03D Datasheet(PDF) 73 Page - Exar Corporation

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