PM5344 datasheet(70/212 Pages) PMC

70 / 212 page

PM5344 SPTX

DATA SHEET

PMC-930531

ISSUE 6

SONET/SDH PATH TERMINATING TRANSCEIVER

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

Bit

Type

Function

Default

Bit 7

Unused

Bit 6

Unused

Bit 5

Unused

Bit 4

R/W

LLBEN

Bit 3

R/W

DLBEN

Bit 2

R/W

ADDUE3

Bit 1

R/W

ADDUE2

Bit 0

R/W

ADDUE1

This register provides control of line and diagnostic loopback of the SPTX.

LLBEN:

When set high, the line loopback enable bit (LLBEN) activates line loopback

in the SPTX. Data from the receive stream propagates to the DROP bus and

replaces the data on the ADD bus. When LLBEN is set low, line loopback is

disabled, data on the ADD bus is transmitted on the transmit stream.

DLBEN:

When set high, the diagnostic loopback enable bit (DLBEN) activates

diagnostic loopback in the SPTX. Data from the ADD bus propagates to the

transmit stream and replaces the data on the receive stream. When DLBEN

is set low, diagnostic loopback is disabled, data on the receive stream is

propagated to the DROP bus.

ADDUEn:

When set high, the ADDUEn bits configure the corresponding STS-1 (AU3)

stream in the ADD bus as unequipped. Payload bytes from that STS-1

stream are overwritten with all-ones. When ADDUEn is set low, the STS-1

stream is equipped and carrying valid data.

PM5344 Datasheet(PDF) 70 Page - PMC-Sierra, Inc

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