XR72L52 Datasheet, PDF (388/480 Pages) Exar Corporation – TWO CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

XRT72L52
REV. 1.0.1
xr
TWO CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
Method 1 requires the use of an additional clock signal, TxOHClk. However, there may be a situation in which
the user does not wish to add this extra clock signal to their design, in order to use the Transmit Overhead Data
Input Interface. Hence, Method 2 is available. When using Method 2, either the TxInClk or RxOutClk signal is
used to sample the overhead bits and signals which are input to the Transmit Overhead Data Input Interface.
Method 2 involves the use of the following signals:
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