XRT79L71_1 Datasheet, PDF (113/434 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
4
LOS Defect Condition
Declared
3
AIS Defect Condition
Declared
2
RxPLD Unstab
1
RxTMark
0
FERF/RDI Defect Condi-
tion Declared
TYPE
R/O
R/O
R/O
R/O
R/O
DESCRIPTION
LOS (Loss of Signal) Defect Condition Indicator:
This READ-ONLY bit-field indicates whether or not the Receive
E3 Framer block is currently declaring the LOS (Loss of Signal)
defect condition, as indicated below.
0 - Indicates that the Receive E3 Framer block is NOT currently
declaring the LOS defect condition.
1 - Indicates that the Receive E3 Framer block is currently
declaring the LOS defect condition.
AIS Defect Condition Indicator:
This READ-ONLY bit-field indicates whether or not the Receive
E3 Framer block is currently declaring the AIS defect condition,
in the incoming E3 data stream, as indicated below.
0 - Indicates that the Receive E3 Framer block is NOT currently
declaring the AIS defect condition in the incoming E3 data
stream.
1 - Indicates that the Receive E3 Framer block is currently
declaring the AIS defect condition in the incoming E3 data
stream.
NOTE: The Receive E3 Framer block will declare the AIS defect
condition if it detects 7 or less "0s" within two
consecutive incoming E3 frames.
Receive Payload-Type Unstable Indicator:
This READ-ONLY bit-field indicates whether or not the Payload
Type (within the MA bytes of each incoming E3 frame) has been
consistent in the last 5 frames, as indicated below.
0 - The Payload Type value has been consistent for at least 5
consecutive E3 frames.
1 - The Payload Type value has NOT been consistence for the
last 5 E3 frames.
Received (Validated) Timing Marker:
This READ-ONLY bit-field indicates the value of the most
recently validated Timing Marker.
FERF/RDI (Far-End-Receive Failure) Defect Condition Indi-
cator:
This READ-ONLY bit-field indicates whether or not the Receive
E3 Framer block is currently declaring the FERF/RDI defect con-
dition, as indicated below.
0 - Indicates that the Receive E3 Framer block is NOT currently
declaring the FERF/RDI defect condition.
1 - Indicates that the Receive E3 Framer block is currently
declaring the FERF/RDI defect condition.
104