XRT79L71_1 Datasheet, PDF (225/434 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 Monitor Mode
Enable
0
Receive Equalizer
Enable
TYPE
R/W
R/W
DEFAULT
VALUE
0
0
DESCRIPTION
Receive Monitor Mode Enable:
This READ/WRITE bit-field permits the user to configure the
Receive DS3/E3 LIU Block of the XRT79L71 to operate in
the Receive Monitor Mode.
If the user configures the Receive DS3/E3 LIU Block to
operate in the Receive Monitor Mode, then it will be able to
receive a nominal DSX-3/STSX-1 signal that has been
attenuator by 20dB of flat loss along with 6dB of cable loss,
in an error-free manner, and without declaring the LOS
defect condition.
0 - Configures the Receive DS3/E3 LIU Block to operate in
the Normal Mode.
1 - Configure the Receive DS3/E3 LIU Block to operate in
the Receive Monitor Mode.
Receive Equalizer Enable - XRT79L71:
This READ/WRITE register bit permits the user to either
enable or disable the Receive Equalizer block within the
Receive DS3/E3 LIU Block of the XRT79L71, as listed
below.
0 - Disables the Receive Equalizer within the Receive DS3/
E3 LIU Block.
1 - Enables the Receive Equalizer within the Receive DS3/
E3 LIU Block.
NOTE: For virtually all applications, we recommend that the
user set this bit-field to "1" and enable the Receive
Equalizer.
LIU Channel Control Register (Address = 0x1306)
BIT 7
BIT 6
BIT 5
BIT 4
Unused
SFM
Clock Out
Enable
SFM
Enable
LIU Remote
Loop-back
Mode
R/O
R/O
R/O
R/W
0
0
0
0
BIT 3
LIU Local
Loop-back
Mode
R/W
0
BIT 2
R/O
0
BIT 1
Unused
R/O
0
BIT 0
R/O
0
BIT
NUMBER
NAME
7
Unused
TYPE
R/O
DEFAULT
VALUE
0
DESCRIPTION
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