XRT72L13 datasheet(140/370 Pages) EXAR

140 / 370 page

XRT72L13

MULTIPLEXER/FRAMER IC

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PRELIMINARY

REV. 1.0.6

128

2.3.2.57 DS2 # 3 Framer Configuration Register

)

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 3.

Setting this bit-field to “0” configures the Receive

DS2 Framer (for Channel 3) 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 3) 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 3.

Setting this bit-field to “0” configures the Receive DS2

Framer (for Channel 3) 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 3) 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 3.

Setting this bit-field to “1” configures the Receive DS2

Framer (for Channel 3) 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 3) 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 3.

Setting this bit-field to “1” configures the Receive DS2

Framer (for Channel 3) 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 3) 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 # 3 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 # 3 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 # 3 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 # 3 to execute a

“Re-Frame” procedure.

A “0” to “1” transition, within this bit-field will cause

Receive DS2 Framer # 3 to execute a “re-frame” op-

eration.

DS2 # 3 FRAMER CONFIGURATION REGISTER (ADDRESS = 0X3C)

BIT 7BIT 6BIT 5BIT 4BIT 3BIT 2BIT 1BIT 0

Unused

ONE AND

ONLY

DS2

MSYNC

Algo

DS2

FSYNC

Algo

DS2

FOOF

Algo

DS2

MOOF

Algo

DS2 MOOF

Disable

DS2

Reframe]

R/O

R/W

000

XRT72L13 Datasheet(PDF) 140 Page - Exar Corporation

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