XRT79L71_1 Datasheet, PDF (224/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
REV. 1.0.0
BIT
NUMBER
NAME
4
Disable ALOS Detector
TYPE
R/W
3
Unused
R/O
2
LOSMUT Enable
R/W
DEFAULT
VALUE
0
0
0
DESCRIPTION
Disable Analog LOS Detector:
This READ/WRITE bit-field permits the user to either enable
or disable the Analog LOS (Loss of Signal) Detector within
the Receive DS3/E3 LIU Block, as described below.
0 - Enables the Analog LOS Detector within Receive DS3/
E3 LIU Block.
NOTE: This is the default condition).
1 - Disables the Analog LOS Detector within Receive DS3/
E3 LIU Block.
NOTE: This bit-field is only active if XRT79L71 has been
configured to operate in the DS3 Modes.
Muting (Recovered Data) upon LOS Enable:
This READ/WRITE bit-field permits the user to configure the
Receive DS3/E3 LIU Block (within the XRT79L71) to auto-
matically internally pull its Recovered Data Output pins
(e.g., RPOS and RNEG) to GND anytime (and for the dura-
tion that) the Receive DS3/E3 LIU Block declares the LOS
defect condition. In other words, this feature (if enabled)
will cause the Receive DS3/E3 LIU Block to automatically
mute the Recovered data (thst is being routed to the
Receive DS3/E3 Framer Block) anytime (and for the dura-
tion that) the Receive DS3/E3 LIU Block declares the LOS
defect condition.
0 - Disables the Muting upon LOS feature. In this setting
the Receive DS3/E3 LIU Block will NOT automatically mute
the Recovered Data whenever it is declaring the LOS defect
condition.
1 - Enables the Muting upon LOS feature. In this setting the
Receive DS3/E3 LIU Block will automatically mute the
Recovered Data whenever it is declaring the LOS defect
condition.
NOTE:
Invoking the Muting upon LOS feature will NOT
configure the Receive Payload Data Output
Interface, Receive UTOPIA Interface or Receive
POS-PHY Interface blocks to mute their outputs to
the System-Side Terminal equipment. This setting
only causes the Receive DS3/E3 LIU Block to
internally mute its recovered data output (that it
routes to the Receive DS3/E3 Framer block)
whenever it (the Receive DS3/E3 LIU Block)
declares the LOS defect condition.
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