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XRT7250 Datasheet(PDF) 331 Page - Exar Corporation

No. de pieza XRT7250
Descripción Electrónicos  DS3/E3 FRAMER IC
PDF  463 Pages
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Fabricante Electrónico  EXAR [Exar Corporation]
Página de inicio  http://www.exar.com
Logo EXAR - Exar Corporation

XRT7250 Datasheet(HTML) 331 Page - Exar Corporation

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DS3/E3 FRAMER IC
REV. 1.1.1
312
Method 2 - Using RxOutClk and the RxOHEnable
signals
Method 1 requires that the Terminal Equipment be
able to handle an additional clock signal, RxOHClk.
However, there may be a situation in which the Termi-
nal Equipment circuitry does not have the means to
deal with this extra clock signal, in order to use the
Receive Overhead Data Output Interface. Method 2
involves the use of the following signals.
• RxOH
• RxOutClk
• RxOHEnable
• RxOHFrame
Each of these signals are listed and described below
in Table 65.
FIGURE 146. ILLUSTRATION OF THE SIGNALS THAT ARE OUTPUT VIA THE RECEIVE OVERHEAD OUTPUT INTERFACE
(FOR METHOD 1).
RxOHClk
RxOHFrame
RxOH
FAS, Bit 9
FAS, Bit 8
FAS, Bit 7
FAS, Bit 6
FAS, Bit 5
Terminal Equipment should sample
the “RxOHFrame” and “RxOH” signals
here.
Recommended Sampling Edges



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