XRT79L71_1 Datasheet, PDF (175/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

REV. 1.0.0
XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
BIT NUMBER
NAME
7-5
Unused
4
TxDL in NR
3
Unused
2
TxAIS Enable
1
TxLOS Enable
0
TxMA Rx
TYPE
R/O
R/W
R/O
R/W
R/W
R/W
DESCRIPTION
Transmit DL (Data Link Channel) in NR Byte:
This READ/WRITE bit-field permits the user to configure the
Transmit LAPD Controller block to use either the NR or the GC
byte as the LAPD/PMDL channel, as described below.
0 - Configures the Transmit LAPD Controller block to transmit all
Outbound LAPD/PMDL Messages via the GC byte.
1 - Configures the Transmit LAPD Controller block to transmit all
Outbound LAPD/PMDL Messages via the NR byte.
Transmit AIS Indicator:
This READ/WRITE bit-field permits the user to (by software con-
trol) force the Transmit E3 Framer block to generate and trans-
mit the AIS indicator to the remote terminal equipment, as
described below.
0 - Does not configure the Transmit E3 Framer block to generate
and transmit the AIS indicator. In this case, the Transmit E3
Framer block will transmit normal E3 traffic.
1 - Configures the Transmit E3 Framer block to generate and
transmit the AIS indicator. In this case, the Transmit E3 Framer
will force all bits (within the Outbound E3 data stream) to an
Unframed "All-Ones" pattern.N
NOTE: This bit-field is ignored if the Transmit E3 Framer block
has been configured to transmit the LOS pattern.
Transmit LOS (Pattern) Enable:
This READ/WRITE bit-field permits the user to (by software con-
trol) force the Transmit E3 Framer block to transmit the LOS
(Loss of Signal) pattern to the remote terminal equipment.
0 - Does not configure the Transmit E3 Framer block to generate
and transmit the LOS pattern.
1 - Configures the Transmit E3 Framer block to generate and
transmit the LOS pattern. In this case, the Transmit E3 Framer
block will force all bits (within the Outbound E3 data stream) to
an "All Zeros" pattern.
Transmit MA Byte from Receiver E3 Framer Block Select:
This READ/WRITE bit-field permits the user to configure the
Transmit E3 Framer block to use either the Receive E3 Framer
block or the Tx MA Byte Register as the source of the FERF/RDI
and FEBE/REI bit-fields (within the MA byte-field of the Out-
bound E3 data stream), as indicated below.
0 - Configures the Transmit E3 Framer to read in the contents of
the Transmit MA Byte register (Address = 0x1136), and write it
into the MA byte-field within each Outbound E3 frame.
NOTE: This option permits the user to send FERF and FEBE
indicators, under software control.
1 - Configures the Transmit E3 Framer block to set the FERF
and FEBE bit-fields to values, based upon conditions detected
by the corresponding Receive E3 Framer block.
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