XRT79L71 Datasheet, PDF (213/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

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PRELIMINARY
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
XRT79L71
REV. P1.0.3
TRANSMIT DS3 PATTERN REGISTER (DIRECT ADDRESS = 0X114C)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
TxAIS -
Unframed All
Ones
DS3 AIS
Non-Stuck
Stuff
Unused
TxLOS
Pattern
Transmit_Idle_Pattern[3:0]
R/W
R/W
R/O
R/W
R/W
R/W
R/W
0
0
0
0
1
1
0
BIT 0
R/W
0
BIT NUMBER
NAME
7
TxAIS - Unframed All
Ones
6
DS3 AIS-Non-Stuck Stuff
5
Unused
4
TxLOS Pattern
TYPE
R/W
R/W
R/W
R/W
DESCRIPTION
Transmit AIS - Unframed All Ones:
This READ/WRITE bit-field permits the user to configure the
"Frame Generator" block to transmit either of the following pat-
tern, anytime it is configured to transmit an AIS signal.
1. A "Framed, repeating 1, 0, 1, 0… pattern (per Bellcore
GR-499-CORE) or
2. An "Unframed All Ones" pattern.
0 - Configures the Frame Generator to transmit the "Framed,
Repeating 1, 0, 1, 0, … pattern; whenever it is configured to
transmit an AIS pattern.
1- Configures the Frame Generator to transmit an "Unframed,
All-Ones" pattern, whenever it is configured to transmit an AIS
signal.
DS3 AIS - Non-Stuck Stuff Option - AIS Pattern:
This READ/WRITE bit-field (along with the "TxAIS - Unframed
All Ones" bit-field) permit the user to define the type of AIS data-
stream that the DS3 Frame Generator block will transmit, as
described below.
0 - Configures the DS3 Frame Generator block to force all of the
"C" bits to "0", when it is configured to transmit a Framed AIS sig-
nal.
1 - Configures the DS3 Frame Generator block to NOT force all
of the "C" bits to "0", when it is configured to transmit an Framed
AIS signal. In this case, the "C" bits can be used to transport
FEAC or PMDL messages.
NOTE: This bit-field is ignored if the DS3 Frame Generator block
has been configured to transmit an "Unframed - All
Ones" type of AIS signal.
Transmit LOS Pattern:
This READ/WRITE bit-field permits the user to configure the
"Frame Generator" block to transmit either an "All Zeros" or an
"All Ones" pattern, anytime it is configured to transmit an "LOS
Pattern".
0 - Configures the Frame Generator to transmit an "All Zeros"
pattern, whenever it is configured to transmit an LOS pattern.
1 - Configures the Frame Generator to transmit an "All Ones"
pattern, whenever it is configured to transmit an LOS pattern.
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