XRT4500(2000) Просмотр технического описания (PDF) - Exar Corporation

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XRT4500
(Rev.:2000)

MULTIPROTOCOL SERIAL NETWORK INTERFACE IC

Exar Corporation 

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PIN DESCRIPTIONS

XRT4500

MULTIPROTOCOL SERIAL NETWORK INTERFACE IC

REV. 1.01

PIN SYMBOL

#

29

TR6A

30

TR6B

DTE

MODE

DCDA

DCDB

DCE

MODE

DCDA

TYPE FUNCTION

I/O Transceiver # 6 Line Signal I/O Pin:

The exact function of this pin depends upon whether the

XRT4500 has been configured to operate in the DCE or DTE

Mode.

DTE Mode: Negative Polarity Input of DCD (Data Carrier

Detect) Signal:

This input pin (along with TR6B, pin 30) accepts the line signal,

from the remote terminal equipment, in either a Single-Ended or

Differential manner. This line signal is converted to CMOS level

signals and is outputted (to the local terminal equipment) via the

RX67D output pin (Pin 32).

DCE Mode: Negative Polarity Output Signal (of DCD-Data

Carrier Detect) to the Line:

Transceiver 6 accepts TTL level binary data stream, via the

“TX67D” (pin 28) input pin. This output pin, along with “TR6B”

(pin 30) will output this data to the Remote Terminal Equipment).

via an Analog Line Signal.

DCDB

Note: This I/O pin will not be used if the XRT4500 has been con-

figured to operate in either the V.28/RS-232 or the V.35 Commu-

nications Interface Mode.

I/O Transceiver #6 Line Signal I/O Pin

The exact function of this pin, depends upon whether the

XRT4500 has been configured to operate in the DCE or DTE

Mode.

DTE Mode: Receiver 6 – Positive Polarity Input of DCD (Data

Carrier Detect) Signal:

This input pin (along with TR6A, pin 29) accepts the line signal,

from the remote terminal equipment, in either a Single-Ended or

Differential manner. This line is converted to CMOS signal levels

and is output (to the local terminal equipment) via the RX67D

output pin (Pin 32).

DCE Mode: Transmitter 6 – Positive Polarity Output of DCD

(Data Carrier Data Signal) Pin:

Transceiver 6 accepts a TTL level binary data stream, via the

TX67D (pin 28) input pin. This output pin (along with TR6A, pin

29) will output this data (to the remote terminal equipment) via

an Analog line signal.

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