XRT73L03 Datasheet, PDF (47/62 Pages) Exar Corporation – 3 CHANNEL E3/DS3/STS-1 LINE INTERFCE UNIT

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PRELIMINARY
3 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT XRT73L03
REV. P1.0.13
COMMAND REGISTER CR3-(N)
D4
D3
D2
D1
D0
SR/(DR)_(n)
LOSMUT(n)
RxOFF(n)
RxClk(n)INV
Reserved
X
X
X
1
X
Inverting the RxClk(n) signals via the Hardware
Mode
Setting the RxClkINV input pin (pin 62) “High" inverts
all the RxClk(n) output signals.
a. Operating in the HOST Mode
Configure Channel(n) to output Single-Rail data to
the Terminal Equipment by writing a "1" into the SR/
(DR)_(n) bit-field of Command Register CR3-(n).
3.6.2 Routing Single-Rail Format (Binary Data
Stream) data to the Receive Terminal Equipment
COMMAND REGISTER CR3-(N)
D4
D3
D2
D1
D0
SR/(DR)_(n)
LOSMUT(n)
RxOFF(n)
RxClk(n)INV
Reserved
1
X
X
X
X
The configured channel outputs Single-Rail data to
the Receiving Terminal Equipment via its correspond-
ing RPOS(n) and RxClk(n) output pins as illustrated
in Figure 27 and Figure 28.
b. Operating in the Hardware Mode
Configure the XRT73L03 to output Single-Rail data
from the Receive Sections of all channels by pulling
the SR/(DR) pin (pin 57) to VDD.
NOTE: When the XRT73L03 is operating in the Hardware
Mode, the setting of the SR/(DR) input pin applies globally
to all three channels.
.
FIGURE 27. THE TYPICAL INTERFACE FOR DATA TRANSMISSION IN A SINGLE-RAIL FORMAT FROM THE
RECEIVE SECTION OF THE XRT73L03 TO THE RECEIVING TERMINAL EQUIPMENT
RxPOS
Terminal Equipment
(E3/DS3 or STS-1
Framer)
RxClk
RPOS
RxClk
Receive
Logic
Block
Exar E3/DS3/STS-1 LIU
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