XRT72L13 Datasheet, PDF (39/370 Pages) Exar Corporation – M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

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PRELIMINARY
PIN DESCRIPTIONS
PIN #
NAME
162
TxNib_0/
TxSer
163
TxNib_1
164
VDD
165
TxNib_2
166
TxNib_3
XRT72L13
M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC
REV. P1.0.6
TYPE
I
I
****
I
I
DESCRIPTION
Transmit Nibble-Parallel Payload Data Input -0/Transmit Serial
Payload Data Input pin:
The exact function of this pin depends upon whether the XRT72L13 is
operating in the "Serial" or "Nibble-Parallel" interface Mode.
TxNib_0 - (Nibble Parallel Interface Mode):
The Terminal Equipment is expected to input data, that is intended to
be transmitted to the remote terminal, over a DS3 transport medium.
The Framer IC will take data, applied to this pin (along with TxNib1,
TxNib2, and TxNib3), and insert it into an outbound "DS3" frame. The
XRT72L13 will sample the data that is at these input pins, upon the
rising edge of the "TxNibClk" signal.
Transmit Serial Payload Data Input Pin - (Serial Interface Mode):
The Terminal Equipment is expected to input data, that is intended to
be transmitted to the remote terminal, over a DS3 transport medium.
The Framer IC will take data, applied to this pin, and insert it into an
outbound "DS3" frame.
If the XRT72L13 M13 Multiplexer/Framer IC has been configured to
operate in the "Local Time" Mode, then it will sample the data (on this
pin) upon the rising edge of "TxInClk". If the XRT72L13 M13 Multi-
plexer/Framer IC has been configured to operate in the "Loop-Time"
Mode, then it will sample the data (on this pin) upon the rising edge of
"RxOutClk".
NOTE: This input pin is active only if the Serial Mode has been
selected.
Transmit Nibble-Paralle Payload Data Input -1:
The Terminal Equipment is expected to input data, that is intended to
be transmitted to the remote terminal, over a DS3 transport medium.
The Framer IC will take data, applied to this pin, and insert it into an
outbound "DS3" frame. The XRT72L13 will sample the data that is at
these input pins, upon the rising edge of the "TxNibClk" signal.
NOTE: This input pin is active only if the Nibble/Parallel Mode has
been selected.
Power Supply Pin
Transmit Nibble-Parallel Payload Data Input -2:
The Terminal Equipment is expected to input data, that is intended to
be transmitted to the remote terminal, over a DS3 transport medium.
The Framer IC will take data, applied to this pin, and insert it into an
outbound " DS3" frame. The XRT72L13 will sample the data that is at
these input pins, upon the rising edge of the "TxNibClk" signal.
NOTE: This input pin is active only if the Nibble/Parallel Mode has
been selected.
Transmit Nibble-Parallel Payload Data Input -3:
The Terminal Equipment is expected to input data, that is intended to
be transmitted to the remote terminal, over an DS3 transport
medium. The Framer IC will take data, applied to this pin (along with
TxNib1, TxNib2, and TxNib3), and insert it into an outbound DS3"
frame. The XRT72L13 will sample the data that is at these input pins,
upon the rising edge of the "TxNibClk" signal.
Note: This input pin is active only if the Nibble/Parallel Mode has
been selected.
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