PM5344 datasheet(69/212 Pages) PMC

69 / 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

R/W

TDIS3

Bit 4

R/W

TDIS2

Bit 3

R/W

TDIS1

Bit 2

R/W

TPTB3EN

Bit 1

R/W

TPTB2EN

Bit 0

R/W

TPTB1EN

This register controls the insertion of path overhead in the transmit stream.

TPTBnEN:

The TPTBnEN bits controls whether the path trace message stored in the

TPTB block is inserted in the transmit stream. When TPTBnEN is set high,

the message in the corresponding transmit path trace buffer (TPTB) is

inserted in the transmit stream. When TPTBnEN is set low, the path trace

message is supplied by the TPOP block or via the corresponding TPOH input.

The TPTBnEN bits must be set low and the serial TPOH stream must be

disable to prevent path trace insertion at intermediate tandem connection

nodes.

TDISn:

The TDISn bits controls the insertion of path overhead bytes in the transmit

stream. When TDIS is set high, the path overhead bytes of the corresponding

transmit stream is sourced from the ADD bus. Serial path overhead insertion

and corruption via the TPOH input is still available. However, setting TPOHEN

high during the B3 byte field corrupts the transmitted byte in an unpredictiable

fashion. All other POH bytes may be modified via the TPOH inputs as

controlled by the TPOP source control register bits and the TPOHEN input

normally. When TDIS is set low, path overhead is processed normally. The

TDISn bits must be set high and the TPOHEN[3:1] inputs set low to disable

path overhead insertion at intermediate tandem connection nodes.

PM5344 Datasheet(PDF) 69 Page - PMC-Sierra, Inc

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