XRT7302 Просмотр технического описания (PDF) - Exar Corporation

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XRT7302

2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

Exar Corporation 

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PIN DESCRIPTION

PIN #

24

SIGNAL NAME

LLB0

25

RLB0

26

AVDD

27

RRing0

28

RTIP0

29

AGND

30

REQEN0

31

REQEN1

32

AGND

33

RTIP1

2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

XRT7302

REV. 1.1.6

TYPE

I

I

****

I

I

****

I

I

****

I

DESCRIPTION

Local Loop-back - Channel 0:

This input pin along with RLB0 dictates the Loop-Back mode in which Channel

0 in the XRT7302 is operating.

A "High" on this pin with RLB0 set to "Low" configures Channel 0 of the

XRT7302 to operate in the Analog Local Loop-back Mode.

A "High" on this pin with RLB0 set to "High" configures Channel 0 of the

XRT7302 to operate in the Digital Local Loop-back Mode.

NOTE: This input pin is ignored and should be connected to GND if the

XRT7302 is operating in the HOST Mode.

Remote Loop-back - Channel 0:

This input pin along with LLB0 dictates the Loop-Back mode in which Channel

0 in the XRT7302 is operating.

A "High" on this pin with LLB0 being set to “Low" configures Channel 0 of the

XRT7302 to operate in the Remote Loop-back Mode.

A "High" on this pin with LLB0 also being set to "High" configures Channel 0 of

the XRT7302 to operate in the Digital Local Loop-back Mode.

NOTE: This input pin is ignored and should be connected to GND if the

XRT7302 is operating in the HOST Mode.

Receive Analog VDD - Channel 0:

Receive Ring Input - Channel 0:

This input pin along with RTIP0 is used to receive the bipolar line signal from

the Remote DS3/E3 Terminal.

Receive TIP Input - Channel 0:

This input pin along with RRing0 is used to receive the bipolar line signal from

the Remote DS3/E3/STS-1 Terminal.

Receive Analog GND - Channel 0

Receive Equalization Enable Input - Channel 0:

Setting this input pin "High" enables the Internal Receive Equalizer of Channel

0. Setting this pin "Low" disables the Internal Receive Equalizer. The guide-

lines for enabling and disabling the Receive Equalizer are described in Section

3.2.

NOTE: This input pin is ignored and should be connected to GND if the

XRT7302 is operating in the HOST Mode.

Receive Equalization Enable Input - Channel 1:

Setting this input pin "High" enables the Internal Receive Equalizer of Channel

1. Setting this pin "Low" disables the Internal Receive Equalizer. The guide-

lines for enabling and disabling the Receive Equalizer are described in Section

3.2.

NOTE: This input pin is ignored and should be connected to GND if the

XRT7302 is operating in the HOST Mode.

Receive Analog GND - Channel 1

Receive TIP Input - Channel 1:

This input pin along with RRing1 is used to receive the bipolar line signal from

the Remote DS3/E3/STS-1 Terminal.

7

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