XRT72L13 Datasheet, PDF (138/370 Pages) Exar Corporation – M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

XRT72L13 MULTIPLEXER/FRAMER IC
REV. 1.0.6
2.3.2.55 DS2 # 1 Framer Configuration Register
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DS2 # 1 FRAMER CONFIGURATION REGISTER (ADDRESS = 0X3A)
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PRELIMINARY
BIT 7
Unused
R/O
0
BIT 6
ONE AND
ONLY
R/W
0
BIT 5
DS2
MSYNC
Algo
R/W
0
BIT 4
DS2
FSYNC
Algo
R/W
0
BIT 3
DS2
FOOF
Algo
R/W
0
BIT 2
DS2
MOOF
Algo
R/W
0
BIT 1
DS2 MOOF
Disable
BIT 0
DS2
Reframe]
R/W
R/W
0
0
Bit 6 - ONE AND ONLY
Bit 5 - DS2 MSYNC - Algo
This “Read/Write” bit-field permits the user to define
the “M-Bit Sync Declaration” Criteria for Receive DS2
Framer - Channel 1.
Setting this bit-field to “0” configures the Receive
DS2 Framer (for Channel 1) to declare “M-SYNC” if it
receives 4 consecutive, correct M-bits.
Setting this bit-field to “1” configures the Receive DS2
Framer (for Channel 1) to declare “M-SYNC” if it re-
ceives 8 consecutive, correct M-bits.
Bit 4 - DS2 FSYNC - Algo
This “Read/Write” bit-field permits the user to define
the “F-Bit Sync Declaration” Criteria for Receive DS2
Framer - Channel 1.
Setting this bit-field to “0” configures the Receive DS2
Framer (for Channel 1) to declare “F-SYNC” if it re-
ceives 8 consecutive, correct F-bits.
Setting this bit-field to “1” configures the Receive DS2
Framer (for Channel 1) to declare “F-SYNC” if it re-
ceives 16 consecutive, correct F-bits.
Bit 3 - DS2 FOOF - Algo
This “Read/Write” bit-field permits the user to define
the “Receive DS2 Out-of-Frame Declaration” criteria,
for DS2 Channel 1.
Setting this bit-field to “1” configures the Receive DS2
Framer (for Channel 1) to declare an “OOF” (Out-of-
Frame) condition when 2 out of the last 5 received F-
bits are errored.
Setting this bit-field to “0” configures the Receive DS2
Framer (for Channel 1) to declare an “OOF” (Out-of-
Frame) condition when 2 out of the last 4 received F-
bits are errored.
Bit 2 - DS2 MOOF Algo
This “Read/Write” bit-field permits the user to define
the “Receive DS2 Out-of-Frame Declaration” criteria,
for DS2 Channel 1.
Setting this bit-field to “1” configures the Receive DS2
Framer (for Channel 1) to declare an “OOF” (Out-of-
Frame) condition when at least one M-bit error is de-
tected within 3 out of the last 4 received DS2 frames.
Setting this bit-field to “0” configures the Receive DS2
Framer (for Channel 1) to declare an “OOF” (Out-of-
Frame) condition when at least one M-bit error is de-
tected within 2 out of the last 4 received DS2 frames.
NOTE: This bit-field is ignored if Bit 1 (within this register is
set to “1”.
Bit 1 - DS2 MOOF Disable
This “Read/Write” bit-field permits the user to config-
ure Receive DS2 Framer # 1 to evaluate M-bits as a
part of the “Receive DS2 Out-of Frame Declaration”
criteria.
Setting this bit-field to “0” configures Receive DS2
Framer # 1 to check for M-bit errors and declare an
OOF condition, per the settings within the “DS2
MOOF Algo” bit-field (Bit 2, within this register).
Setting this bit-field to “1” configures Receive DS2
Framer # 1 to NOT check for M-bits errors, as a part
of the “Receive DS2 Out-of Frame Declaration” crite-
ria.
Bit 0 - DS2 Reframe
This “Read/Write” bit-field permits the user to force
(via software) Receive DS2 Framer # 1 to execute a
“Re-Frame” procedure.
A “0” to “1” transition, within this bit-field will cause
Receive DS2 Framer # 1 to execute a “re-frame” op-
eration.
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