XRT84L38 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT84L38' PDF : 453 Pages View PDF
XRT84L38
OCTAL T1/E1/J1 FRAMER
REV. 1.0.1
OVERHEAD INTERFACE
(Framer Channel Number indicated by _n)
SIGNAL NAME
TxOH_0
TxOH_1
TxOH_2
TxOH_3
TxOH_4
TxOH_5
TxOH_6
TxOH_7
PIN #
A7
C14
D23
F23
AA24
AC17
AC14
AD5
TYPE
DESCRIPTION
I Transmit Overhead Input—Framer_n:
This input pin, along with TxOHClk_n functions as the Transmit Overhead input
port for Framer_n.
DS1 Mode:
This input pin will become active if the Transmit Section of Framer_n has been
configured to use this input as the source of Facility Data Link bits in ESF fram-
ing mode, Fs bits in the SLC96 and N framing mode, and R bit in T1DM mode.
The data that is input into this pin will be inserted into the Data Link Bits within
the outbound DS1 frames at the falling edge of TxOHClk_n.
NOTE: This input pin will be disabled if Framer_n is using the Transmit HDLC
Controller, or the TxSer_n input as the source for the Data Link Bits.
E1 Mode:
This input pin will become active if the Transmit Section of Framer_n has been
configured to use this input as the source of Data Link bits. The data that is input
into this pin will be inserted into the Sa4 through Sa8 bits (the National Bits)
within the outbound non-FAS E1 frames.
NOTE: This input pin will be disabled if Framer_n is using the Transmit HDLC
Controller, or the TxSer_n input as the source for the Data Link Bits.
TxOHClk_0
TxOHClk_1
TxOHClk_2
TxOHClk_3
TxOHClk_4
TxOHClk_5
TxOHClk_6
TxOHClk_7
A5
C15
D21
F24
AC25
AD20
AD13
AF3
O Transmit OH Serial Clock Output Signal—Framer_n:
This output clock signal functions as a demand clock signal for the "Transmit
Overhead Data Input Interface" block associated with Framer_n.
DS1 Mode:
If the "Transmit Overhead Data Input Interface" has been configured to be the
source of Facility Data Link bits in ESF framing mode, Fs bits in the SLC96 and
N framing mode, and R bit in T1DM framing mode, then the Transmit Overhead
data Input Interface block will provide a clock edge for each Data Link Bit.
Data Link Equipment, which is interfaced to this pin, should update its data (on
the TxOH_n line) on the rising edge of this clock signal. The Transmit Overhead
Data Input Interface will latch the data (on the TxOH_n line) on the falling edge
of this clock signal.
NOTES:
1. If the "Transmit Overhead Data Input Interface” has not been configured
to be the source of the Data Link information, then this output signal will
be inactive.
2. Depending on the configurations of Framer_n, the clock frequency in
ESF framing mode can be 2KHz or 4KHz in ESF.
E1 mode:
If the "Transmit Overhead data Input Interface" has been configured to be the
source of Data Link information, then the Transmit Overhead data Input Inter-
face block will provide a clock edge for each "Sa" bit that is carrying data link
information.
Data Link Equipment, which is interfaced to this pin, should update its data (on
the TxOH_n line) on the rising edge of this clock signal. The Transmit Overhead
Data Input Interface will latch the data (on the TxOH_n line) on the falling edge
of this clock signal.
NOTE: If the "Transmit Overhead Data Input Interface” has not been configured
to be the source of the Data Link information, then this output signal will be inac-
tive.
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