XRT72L13 Datasheet, PDF (328/370 Pages) Exar Corporation – M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

XRT72L13
M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC
REV. P1.0.6
áç
PRELIMINARY
FIGURE 108. ILLUSTRATION OF THE SIGNALS THAT ARE OUTPUT VIA THE “RECEIVE OVERHEAD OUTPUT INTERFACE
(FOR METHOD 1).
RxOHClk
RxOHFrame
RxOH
X
F1
AIC
F0
FEAC
Terminal Equipment should sample
the “RxOHFrame” and “RxOH” signals
here.
Recommended Sampling Edges
Method 2 - Using “RxOutClk” and the “RxOHEn-
able” signals
Method 1 requires that the Terminal Equipment be
able to handle an additional clock signal; “RxO-
HClk”. However, there may be a situation in which
the Terminal Equipment circuitry does not have the
means to accommodate and process this extra clock
signal, in order to use the “Receive Overhead Data
Output” Interface. Hence, Method 2 is available.
Method 2 involves the use of the following signals.
• RxOH
• RxOutClk
• RxOHEnable
• RxOHFrame
Each of these signals are listed and described below
in Table 37 .
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