XRT72L13 Datasheet, PDF (227/370 Pages) Exar Corporation – M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

áç
PRELIMINARY
XRT72L13
M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC
REV. P1.0.6
This “Read/Write” bit-field permits the user to config-
ure the contents of the “output” DS1 Channel 5 to be
overwritten with an “All Ones” pattern.
Setting this bit-field to “0” permits the contents of DS1
Channel 5 to be transmitted as received (via the
TxDS1Data1 input pin).
Setting this bit-field to “1” configures the XRT72L13
M13 device to overwrite this data with an AIS (all
ones pattern).
Bit 0 - Insert AIS Tx DS1 Channel 4
This “Read/Write” bit-field permits the user to config-
ure the contents of the “output” DS1 Channel 4 to be
overwritten with an “All Ones” pattern.
Setting this bit-field to “0” permits the contents of DS1
Channel 4 to be transmitted as received (via the
TxDS1Data0 input pin).
Setting this bit-field to “1” configures the XRT72L13
M13 device to overwrite this data with an AIS (all
ones pattern).
3.3.2.32 M12 DS2 # 3 AIS Register
3.3.2.36 M12 DS2 # 7 AIS Register
3.3.2.37 M12 DS2 # 1 Loopback Request Regis-
ter
3.3.2.38 M12 DS2 # 2 Loopback Request Regis-
ter
3.3.2.39 M12 DS2 # 3 Loopback Request Regis-
ter
3.3.2.40 M12 DS2 # 4 Loopback Request Regis-
ter
3.3.2.41 M12 DS2 # 5 Loopback Request Regis-
ter
3.3.2.42 M12 DS2 # 6 Loopback Request Regis-
ter
3.3.2.33 M12 DS2 # 4 AIS Register
3.3.2.43 M12 DS2 # 7 Loopback Request Regis-
ter
3.3.2.34 M12 DS2 # 5 AIS Register
3.3.2.35 M12 DS2 # 6 AIS Register
3.3.2.44 Tx DS3 Configuration Register)
)
TX DS3 CONFIGURATION REGISTER (ADDRESS = 0X30)
BIT 7
Tx Yellow
Alarm
R/W
0
BIT 6
Tx X Bits
R/W
0
BIT 5
Tx Idle
R/W
0
BIT 4
Tx AIS
R/W
0
BIT 3
Tx LOS
R/W
0
BIT 2
FERF on
LOS
R/W
1
BIT 1
FERF on
OOF
R/W
1
BIT 0
FERF on
AIS
R/W
1
Bit 7 - Tx Yellow Alarm
This "Read/Write" bit-field allows the local µP to com-
mand the Transmit DS3 Framer to transmit a "Yellow
Alarm" (e.g., X bits are all "0") in the outgoing DS3
data stream.
Writing a "0" to this bit-field disables this feature (the
default condition). In this condition, the X-bits in the
out-bound DS3 frame, are internally generated
(based upon receiver conditions).
Writing a "1" to this bit-field invokes this command. In
this condition, the Transmit DS3 Framer will override
the internally-generated X-bits and force all of the X-
bits of each outbound DS3 frame to "0".
NOTE: For more information in this feature, please see Sec-
tion _.
NOTE: This bit-setting is ignored if Bits 3, 4 or 5 (within this
register) are set to "1".
Bit 6 - Tx X-Bit (Force X bits to "1")
This "Read/Write" bit-field allows the user to com-
mand the Transmit DS3 Framer to force all of the X-
bits, in the outbound DS3 Frames, to "1".
Writing a "0" to this bit-field disables this feature (the
default condition). In this case, the Transmit DS3
215