XRT75L03DIV View Datasheet(PDF) - Exar Corporation

Part Name

Description

Manufacturer

XRT75L03DIV

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

Exar Corporation 

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XRT75L03D

THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER REV. 1.0.0

BIT

NUMBER

NAME

1

TxON Ch 1

TYPE

R/W

DEFAULT

VALUE

0

0

TxON Ch 0 R/W 0

DESCRIPTION

Transmit Section ON - Channel 1

This READ/WRITE bit-field is used to either turn on or turn off the

Transmit Driver associated with Channel 1. If the user turns on the

Transmit Driver, then Channel 1 will begin to transmit DS3, E3 or

STS-1 pulses on the line via the TTIP_1 and TRING_ 1 output pins.

Conversely, if the user turns off the Transmit Driver, then the TTIP_1

and TRING_1 output pins will be tri-stated.

0 - Shuts off the Transmit Driver associated with Channel 1 and tri-

states the TTIP_1 and TRING_ 1 output pins.

1 - Turns on or enables the Transmit Driver associated with Channel

1.

NOTE: If the user wishes to exercise software control over the state

of the Transmit Driver associated with Channel 1, then it is

imperative that the user pull the TxON_1 (pin 1) to a logic

"High" level.

Transmit Section ON - Channel 0

This READ/WRITE bit-field is used to either turn on or turn off the

Transmit Driver associated with Channel 0. If the user turns on the

Transmit Driver, then Channel 0 will begin to transmit DS3, E3 or

STS-1 pulses on the line via the TTIP_0 and TRING_ 0 output pins.

Conversely, if the user turns off the Transmit Driver, then the TTIP_0

and TRING_0 output pins will be tri-stated.

0 - Shuts off the Transmit Driver associated with Channel 0 and tri-

states the TTIP_0 and TRING_ 0 output pins.

1 - Turns on or enables the Transmit Driver associated with Channel

0.

NOTE: If the user wishes to exercise software control over the state

of the Transmit Driver associated with Channel 0, then it is

imperative that the user pull the TxON_0 (pin 38) to a logic

"High" level.

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