XRT72L71 Datasheet, PDF (63/102 Pages) Exar Corporation – DS3 ATM UNI/CLEAR CHANNEL FRAMER

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REGISTER 22
BIT
FUNCTION
7 Tx Yellow Alarm
6 Tx XBit
5 Tx Idle
4 Tx AIS
3 Tx LOS
2 FERF on LOS
1 FERF on OOF
0 FERF on AIS
XRT72L71
DS3 ATM UNI/CLEAR CHANNEL FRAMER
REV. 1.1.0
TABLE 23: TX DS3 CONFIGURATION REGISTER
TX DS3 CONFIGURATION REGISTER
HEX ADDRESS: 0X16
TYPE
R/W
DEFAULT
DESCRIPTION-OPERATION
0: X-bits are transmitted as conditions (detected by the “Receive DS3
Framer” block) dictate.
1: All X-bits (within each “outbound” DS3 frame) are set to “0” (forced inser-
0
tion of Yellow Alarm)
NOTE: This bit-field is ignored when the “TxIdle”, the “TxAIS” or the
“TxLOS” bits are set.
0: X-bits are transmitted as conditions (detected by the “Receive DS3
Framer” block) dictate.
R/W
0
1: All X-bits (within each “outbound” DS3 frame) are forced to “1”.
NOTE: This bit-field is ignored when the “TxIdle”, the “TxAIS” or the
“TxLOS” bits are set.
0: The Idle pattern is NOT transmitted into the “outbound” DS3 data stream.
R/W
0
1: The Idle pattern is transmitted into the “outbound” DS3 data stream.
NOTE: This bit-field is ignored when the “TxAIS” or the “TxLOS” bits are set.
0: The “AIS” pattern is NOT transmitted into the “outbound” DS3 data
stream.
R/W
0
1: The “AIS” pattern is transmitted into the “outbound” DS3 data stream.
NOTE: This bit-field is ignored when the “TxLOS” bit is set.
0: The “All Zeros” pattern is NOT transmitted into the “outbound” DS3 data
R/W
0
stream.
1: The “LOS” (e.g., “All Zeros”) pattern is transmitted into the “outbound”
DS3 data stream.
0: FERF (Far-End Receive Failure) is NOT transmitted whenever the
R/W
1
Receive DS3 Framer block declares an LOS (Loss of Signal) condition.
1: FERF is transmitted whenever the Receive DS3 Framer block declares an
LOS condition.
0: FERF (Far-End Receive Failure) is NOT transmitted whenever the
R/W
1
Receive DS3 Framer block declares an OOF (Out of Frame) condition.
1: FERF is transmitted whenever the Receive DS3 Framer block declares an
OOF condition.
0: FERF is NOT transmitted whenever the Receive DS3 Framer block
R/W
1
detects an AIS pattern in the “inbound” DS3 data stream.
1: FERF is transmitted whenever the Receive DS3 Framer block detects the
AIS pattern in the “inbound” DS3 data stream.
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