XRT72L13 Datasheet, PDF (102/370 Pages) Exar Corporation – M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

XRT72L13 MULTIPLEXER/FRAMER IC
REV. 1.0.6
2.3.2.11 M23 Request Loopback Register
M23 REQUEST LOOPBACK REGISTER (ADDRESS = 0X09)
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PRELIMINARY
BIT 7
Not Used
R/O
0
BIT 6
DS2
Loopback
Request
Channel 6
R/W
0
BIT 5
DS2
Loopback
Request
Channel 5
R/W
0
BIT 4
DS2
Loopback
Request
Channel 4
R/W
0
BIT 3
DS2
Loopback
Request
Channel 3
R/W
0
BIT 2
DS2
Loopback
Request
Channel 2
R/W
0
BIT 1
DS2
Loopback
Request
Channel 1
R/W
0
BIT 0
DS2
Loopback
Request
Channel 0
R/W
0
Bits 6 thru 0 - DS2 Loopback Request Channel
[6:0]
These seven (7) “Read/Write” bit-field permits the us-
er to request that the Remote Terminal Equipment
configure one of their DS2 channels to operate in the
“Remote Loopback” Mode.
Setting any one of these bit-fields to “1” will cause the
XRT72L13 M13 device to insert a “DS2 Remote
Loopback Command Request” (for the corresponding
DS2 channel) to be inserted into the “outbound” DS3
data stream. The “Remote Terminal Equipment”
should respond by executing the appropriate loop-
back command.
For example, setting Bit 5 (within this register) will
cause the XRT72L13 M13 device to insert the “Chan-
nel 5 DS2 Remote Loopback Command Register” in-
to the “outbound” DS3 data stream. The Remote Ter-
minal Equipment will be expected to respond by con-
figuring DS2 Channel 5, into the “Remote Loopback”
Mode.
NOTE: This registert is only active if the XRT72L13 M13
device has been configured to operate in the “M13/Chan-
nelized” Mode.
2.3.2.12 M23 Loopback Activation Register
M23 LOOPBACK ACTIVATION REGISTER (ADDRESS = 0X0A)
BIT 7
Not Used
R/O
0
BIT 6
DS2
Loopback
Activation
Channel 6
R/W
0
BIT 5
DS2
Loopback
Activation
Channel 5
R/W
0
BIT 4
DS2
Loopback
Activation
Channel 4
R/W
0
BIT 3
DS2
Loopback
Activation
Channel 3
R/W
0
BIT 2
DS2
Loopback
Activation
Channel 2
R/W
0
BIT 1
DS2
Loopback
Activation
Channel 1
R/W
0
BIT 0
DS2
Loopback
Activation
Channel 0
R/W
0
Bits 6 thru 0 - DS2 Loopback Activation Channel
[6:0]
These seven (7) “Read/Write” bit-fields permit the us-
er to configure any of the seven DS2 channels into
the “Remote Loopback” Mode.
Setting any one of these bit-fields to “1” will cause the
corresponding DS2 channel to operate in the “Re-
mote Loopback” Mode.
M23 RX DS2 AIS REGISTER (ADDRESS = 0X0B)
Setting any one of these bit-fields to “0” will cause the
corresponding DS2 channel to terminate “Remote
Loopback Mode” operation.
2.3.2.13 M23 RxAIS Register
BIT 7
Not Used
R/O
0
BIT 6
RxDS2 AIS
Channel 6
R/W
0
BIT 5
RxDS2 AIS
Channel 5
R/W
0
BIT 4
RxDS2 AIS
Channel 4
R/W
0
BIT 3
RxDS2 AIS
Channel 3
R/W
0
BIT 2
RxDS2 AIS
Channel 2
R/W
0
BIT 1
RxDS2 AIS
Channel 1
R/W
0
BIT 0
RxDS2 AIS
Channel 0
R/W
0
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