XRT5997IV View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT5997IV' PDF : 37 Pages View PDF
XRT5997
Data
Bit
P e rio d
1
RZ Pulse is to be
applied in the first
half of the bit-period
1
0
1
No pulse is to be applied
in the second half of the
bit period
1
1
0
TxPOS _x
TxNEG _x
TxClk _x
No Activity in TxClk Line
Figure 3. Illustration on how the Terminal Equipment should apply data to the “Transmit Section” of a
given Channel (within the XRT5997 Device), when operating in the “Clockless” Mode
Figure 3, indicates that when the user is operating a
channel in the “Clockless” Mode, then the correspond-
ing Terminal Equipment must do the following:
• Not apply a signal on the “TxClk_x” line.
1.3 The Pulse Shaping Circuit
The purpose of the “Transmit Pulse Shaping” circuit is
to generate “Transmit Output” pulses that comply with
the ITU-T G.703 Pulse Template Requirements for E1
Applications.
• When applying a pulse (to either the TxPOS_x or
TxNEG_x input pin), apply an RZ pulse to the
appropriate input pin. This RZ pulse should only
have a width of one-half the bit-period. Addition,
the RZ pulse should occupy only the first half of
the bit-period. The TxPOS_x and TxNEG_x input
pins must be at 0V, during the second half of
every bit-period.
Rev. 1.0.0
21
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