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XRT72L13 Datasheet(PDF) 71 Page - Exar Corporation

Part # XRT72L13
Description  M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC
PDF  370 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT72L13 Datasheet(HTML) 71 Page - Exar Corporation

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M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC
XRT72L13
PRELIMINARY
REV. 1.0.6
59
As this mode implies, the "Clear Channel DS3 Framer
Mode" permits the user to transmit and receive any
type of data over the DS3 Transport Medium.
1.2.1
Operation of the XRT72L13 while in the
"Clear Channel DS3 Framer Mode"
To be provided in the next update.
1.2.1.1
Diagnostic Features
When the XRT72L13 is operating in the "Clear Chan-
nel DS3 Framer" Mode, then the following diagnostic
features are available.
• Local Loop-back Mode
• Remote Loop-back Mode
• PRBS Pattern Generation/Reception
1.2.1.1.1
Local Loop-back Mode
Figure 30 presents an illustration of the XRT72L13
operating in the Local-Loop-back Mode.
FIGURE 29. FUNCTIONAL BLOCK DIAGRAM OF THE XRT72L13 M13 MULTIPLEXER/FRAMER IC, WHILE OPERATING
IN THE
“CLEAR CHANNEL DS3 FRAMER MODE”
Transmit Payload
Data Input
Interface Block
Transmit DS3
Framer Block
Transmit
LIU
Interface
Block
Receive LIU
Interface
Block
Receive DS3
Framer Block
Receive Payload
Data Output
Interface Block
Microprocessor
Interface
TxSer
TxNib[3:0]
TxInClk
MOTO
D[7:0]
A[8:0]
IntB*
CSB*
RdB_DS
WrB_RW
Rdy_Dtck
Reset*
ALE_AS
RxSer
RxNib[3:0]
RxOutClk
TxPOS
TxNEG
TxLineClk
RxPOS
RxNEG
RxLineClk
Tx LAPD Buffer/
Controller
Rx LAPD Buffer/
Controller
Transmit Overhead
Input
Interface Block
Receive Overhead
Output
Interface Block
TxOHClk
TxOHIns
TxOHInd
TxOH
TxOHEnable
TxOHFrame
TxNibClk
TxFrame
RxNibClk
RxFrame
RxOHFrame
RxOH
RxOHClk
RxOHEnable
RxOHInd



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