PM7347 datasheet(143/341 Pages) PMC

143 / 341 page

S/UNI®-JET Data Sheet

Released

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

143

Document ID: PMC-1990267, Issue 3

Bit

Type

Function

Default

Bit 7

Unused

Bit 6

Unused

Bit 5

R/W

WORDBIP

Bit 4

R/W

Reserved

Bit 3

R/W

WORDERR

Bit 2

R/W

PYLD&JUST

Bit 1

R/W

FERFDET

Bit 0

R/W

TMARKDET

The TMARKDET bit determines the persistency check performed on the Timing Marker bit

(bit 8 of the G.832 Maintenance and Adaptation byte). When TMARKDET is logic one, the

Timing Marker bit must be in the same state for 5 consecutive frames before the TIMEMK

status is changed to that state. When TMARKDET is logic zero, the Timing Marker bit must

be in the same state for three consecutive frames. When a framing mode other than G.832 is

selected, the setting of the TMARKDET bit is ignored.

FERFDET

The FERFDET bit determines the persistency check performed on the Far End Receive

Failure (FERF) bit (bit 1 of the G.832 Maintenance and Adaptation byte) or on the RAI (RAI)

bit (bit 11 of the frame in G.751 mode). When FERFDET is logic one, the FERF, or RAI, bit

must be in the same state for 5 consecutive frames before the FERF/RAI status is changed to

that state. When FERFDET is logic zero, the FERF, or RAI, bit must be in the same state for

three consecutive frames.

PYLD&JUST

The PYLD&JUST bit selects whether the justification service bits and the tributary

justification bits in framing mode G.751 is indicated as overhead or payload. When

PYLD&JUST is logic one, the justification service bits and the tributary justification bits are

indicated as payload to the SPLR. When PYLD&JUST is logic zero, the justification service

and tributary justification bits are indicated as overhead to SPLR. For G.751 ATM

applications, this bit must be set to logic one for correct cell mapping.

PM7347 Datasheet(PDF) 143 Page - PMC-Sierra, Inc

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