XRT83SL30IV(2003) View Datasheet(PDF) - Exar Corporation

Part Name

Description

Manufacturer

XRT83SL30IV
(Rev.:2003)

SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

Exar Corporation 

XRT83SL30

áç

SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

REV. P1.0.4

PRELIMINARY

SIGNAL NAME

INSBPV

NLCD

AISD

QRPD

PIN #

35

38

39

40

TYPE

I

O

DESCRIPTION

Insert Bipolar Violation

In Hardware Mode, when this pin transitions from "0" to "1", a bipolar viola-

tion is inserted in the transmitted data stream. Bipolar violation can be

inserted either in the QRSS pattern, or input data when operating in single-

rail mode. The state of this pin is sampled on the rising edge of TCLK.

NOTE: To ensure the insertion of a bipolar violation, this pin should be reset

to a "0" prior to setting to a "1".

Network Loop-Code Detection Output pin

This pin operates differently in the Manual or the Automatic Network Loop-

Code detection modes.

In the Manual Loop-Code detection mode (NLCDE1 =”0” and NLCDE0 =”1”,

or NLCDE1 =”1” and NLCDE0 =”0”) this pin gets set to “1” as soon as the

Loop-Up (“00001”) or Loop-Down (“001”) code is detected in the receive data

for longer than 5 seconds. The NLCD pin stays in the “1” state for as long as

the chip detects the presence of the Loop-Code in the receive data and it is

reset to “0” as soon as it stops receiving it.

When the Automatic Loop-Code detection mode (NLCDE1 =”1” and

NLCDE0 =”1”) is initiated, the NLCD output pin is reset to “0” and the chip is

programmed to monitor the receive input data for the Loop-Up Code. The

NLCD pin is set to a “1” to indicate that the Network Loop Code is detected

for more than 5 seconds. Simultaneously the Remote Loop-Back condition is

automatically activated and the chip is programmed to monitor the receive

data for the Network Loop-Down Code. The NLCD pin stays in the “1” state

for as long as the Remote Loop-Back condition is in effect even if the chip

stops receiving the Loop-Up Code. Remote Loop-Back is removed if the chip

detects the “001” pattern for longer than 5 seconds in the receive data.

Detecting the “001” pattern also results in resetting the NLCD output pin.

O Alarm Indication Signal Detect Output pin

This pin is set to "1" to indicate that an All Ones Signal is detected by the

receiver. The value of this pin is based on the current status of Alarm Indica-

tion Signal detector.

O Quasi-random Pattern Detection Output pin

This pin is set to "1" to indicate that the receiver is currently in synchroniza-

tion with the QRSS pattern. The value of this pin is based on the current sta-

tus of Quasi-random pattern detector.

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