XRT72L58 Просмотр технического описания (PDF) - Exar Corporation

Номер в каталоге

Компоненты Описание

производитель

XRT72L58

EIGHT CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

Exar Corporation 

XRT72L58

EIGHT CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

REV. P1.1.2

áç

PRELIMINARY

PIN DESCRIPTION FOR THE XRT72L58

PIN #

A18

PIN NAME

RxNib0[5]/

RxHDLCDat0[5]

A19

RxNib3[5]/

RxHDLCDat3[5]

A20

TxNibFrame[5]/

ValFCS[5]

A21

TxOHInd[5]/

TxHDLCDat6[5]

A22

TxAISEn[5]

A23

TxNib0[5]/

TxHDLCDat0[5]

A24

TxSer[5]/

SndMsg[5]

A25

RxNib1[2]/

RxHDLCDat1[2]

A26

RxFrame[2]

TYPE

O

O

O

DESCRIPTION

Receive Nibble Output - 0:

The Framer will output "Received data (from the Remote Terminal) to the local

Terminal Equipment via this pin along with RxNib1, RxNib2 and RxNib3.

The data at this pin is updated on the rising edge of the RxClk output signal.

NOTE: This output pin is active only if the Nibble-Parallel Mode has been

selected.

Receive HDLC Data Output - 0:

This pin contains bit 0 RxHDLC data when the HDLC controller is turned on.

Receive Nibble Output - 3:

The Framer will output "Received data (from the Remote Terminal) to the local

Terminal Equipment via this pin along with RxNib0, RxNib1 and RxNib2.

The data at this pin is updated on the rising edge of the RxClk output signal.

NOTE: This output pin is active only if the Nibble-Parallel Mode has been

selected.

Receive HDLC Data Output - 3:

This pin contains bit 3 RxHDLC data when the HDLC controller is turned on.

See Description of Pin A12

O

See Description of Pin A6

I

I

Transmit AIS Command Input:

Setting this input pin "high" configures the Transmit Section to generate and

transmit an AIS Pattern.

Setting this input pin "low" configures the Transmit Section to generate E3 or

DS3 traffic in a normal manner.

I

See Description of Pin A3

I

Transmit Serial Payload Data Input Pin:

The Terminal Equipment is expected to input data, that is intended to be

transmitted to the remote terminal, over an E3 or DS3 transport medium. The

Framer will take data, applied to this pin, and insert it into an outbound "E3 or

DS3" frame.

If the XRT72L58 Framer has been configured to operate in the "Local Time"

Mode, then it will sample the data (on this pin) upon the rising edge of "TxIn-

Clk". If the XRT72L58 Framer has been configured to operate in the "Loop-

Time" Mode, then it will sample the data (on this pin) upon the rising edge of

"RxOutClk".

NOTE: This input pin is active only if the Serial Mode has been selected.

Send Message:

This input is to remain “HIGH” during the entire duration of the HDLC packet,

(including FCS bytes) to be transmitted, when the HDLC controller is turned

on.

O

See Description of Pin A5

O

See Description of Pin A9

7

Share Link: