PM7347 datasheet(227/341 Pages) PMC

227 / 341 page

S/UNI®-JET Data Sheet

Released

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

227

Document ID: PMC-1990267, Issue 3

Bit

Type

Function

Default

Bit 7

R/W

Reserved

Bit 6

R/W

Reserved

Bit 5

R/W

Reserved

Bit 4

R/W

Reserved

Bit 3

R/W

Reserved

Bit 2

R/W

EXPLD[2]

Bit 1

R/W

EXPLD[1]

Bit 0

R/W

EXPLD[0]

EXPLD[2:0]

The EXPLD[2:0] bits contain the expected payload type label bits of the G.832 E3

Maintenance and Adaptation (MA) byte. The EXPLD[2:0] bits are compared with the

received payload type label extracted from the receive stream. A payload type label mismatch

(PLDM) is declared if the received payload type bits differs from the expected payload type.

If enabled, an interrupt is asserted upon declaration and removal of PLDM.

For compatibility with old equipment that inserts 000B for unequipped or 001B for equipped,

regardless of the payload type, the receive payload type label mismatch mechanism is based

on Table 24:

Table 24 TTB Payload Type Match Configurations

Expected

Received

Action

000

Match

000

001

Mismatch

000

XXX

Mismatch

001

000

Mismatch

001

Match

001

XXX

Match

XXX

000

Mismatch

XXX

001

Match

XXX

Match

XXX

YYY

Mismatch

Note

XXX, YYY = anything except 000B or 001B, and XXX is not equal to YYY.

Reserved

The reserved bits must be written to logic zero for proper operation.

PM7347 Datasheet(PDF) 227 Page - PMC-Sierra, Inc

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