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XRT7250 Datasheet(PDF) 331 Page - Exar Corporation |
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XRT7250 Datasheet(HTML) 331 Page - Exar Corporation |
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331 / 463 page  XRT7250 áç áç áç áç 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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