XRT79L71_1 Datasheet, PDF (221/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

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XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
BIT
NUMBER
NAME
1
Receive LOS Defect
Condition Declared
0
Transmit DMO
Condition Declared
TYPE
R/O
R/O
DEFAULT
VALUE
0
0
DESCRIPTION
Receive LOS (Loss of Signal) Defect Condition
Declared:
This READ-ONLY bit-field indicates whether or not the
Receive Section (within the XRT79L71) is currently declar-
ing the LOS defect condition.
The Receive Section (of XRT79L71) will declare the LOS
defect condition, if any one of the following conditions is
met.
• If the Digital LOS Detector declares the LOS defect
condition (for DS3 application)· If the Analog LOS
Detector declares the LOS defect condition (for DS3
application)
• If the ITU-T G.775 LOS Detector declares the LOS defect
condition (for E3 application).
0 - Indicates that the Receive Section is NOT currently
declaring the LOS Defect Condition.
1 - Indicates that the Receive Section is currently declaring
the LOS Defect condition.
Transmit DMO (Drive Monitor Output) Condition
Declared:
This READ-ONLY bit-field indicates whether or not the
Transmit Section is currently declaring the DMO Alarm con-
dition.
If configured accordingly, the Transmit Section will either
internally or externally check the Transmit Output DS3/E3
Line signal for bipolar pulses via the TTIP and TRING out-
put signals. If the Transmit Section were to detect no bipo-
lar for 128 consecutive bit-periods, then it will declare the
Transmit DMO Alarm condition. This particular alarm can
be used to check for fault conditions on the Transmit Output
Line Signal path.
The Transmit Section will clear the Transmit DMO Alarm
condition the instant that it detects some bipolar activity on
the Transmit Output Line signal.
0 - Indicates that the Transmit Section of XRT79L71 is NOT
currently declaring the Transmit DMO Alarm condition.
1 - Indicates that the Transmit Section of XRT79L71 is cur-
rently declaring the Transmit DMO Alarm condition.
LIU Transmit Control Register (Address = 0x1304)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
Unused
Internal
Transmit
Drive Moni-
tor
Unused
R/O
R/O
R/W
R/O
R/O
0
0
0
0
0
BIT 2
TAOS
BIT 1
Unused
BIT 0
TxLEV
R/W
R/O
R/W
0
0
0
212