PM5313 datasheet(91/646 Pages) PMC

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PRODUCTION

PMC-Sierra, Inc.

PM5313 SPECTRA-622

DATASHEET

PMC-1981162

ISSUE 6

SONET/SDH PAYLOAD EXTRACTOR/ALIGNER FOR 622 MBIT/S

PROPRIETARY AND CONFIDENTIAL

Pin Name

Type

No.

Function

RPOHEN

Output

C15

The receive path overhead enable signal

(RPOHEN) indicates the validity of the path

overhead bytes extracted to the RPOH from the

path overhead of the twelve STS-1 (STM-0/AU3)

streams or the four STS-3/3c (STM-1/AU3/AU4)

streams or the single STS-12c (STM-4-4c) stream.

When RPOHEN signal is set high, the

corresponding path overhead byte presented on

the RPOH is valid. When RPOHEN is set low, the

corresponding path overhead byte presented on

the RPOH is invalid.

RPOHEN is updated on the falling edge of

RPOHCLK.

B3E

Output

A14

The bit interleaved parity error signal (B3E) carries

the path BIP-8 error detected for each STS-1

(STM-0/AU3), STS-3c (STM-1/AU4) and STS-12c

(STM-4-4c) in the receive stream. It is set high for

one RPOHCLK period for each path BIP-8 error

detected (up to eight per frame) or when errors are

treated on a block basis, is set high for only one

RPOHCLK period if any of the path BIP-8 bits are

in error. Path BIP-8 errors are detected by

comparing the extracted path BIP-8 byte (B3) with

the computed BIP-8 for the previous frame.

B3E is updated on the falling edge of RPOHCLK.

RALM

Output

A19

The Receive Alarm (RALM) signal is a multiplexed

output of individual alarms of the receive STS-1

(STM-0/AU3), STS-3c (STM-1/AU4) and STS-12c

(STM-4-4c) streams. Each alarm represents the

logical OR of the LOS/LOF/LAIS, LOP, PAIS,

PRDI, PERDI, LOM, LOPCON, PAISCON, UNEQ,

PSLU, PSLM, TIU-P, TIM-P status of the

corresponding stream. The selection of alarms to

be reported is controlled by the SPECTRA-622

RPPS RALM Output Control #1 and #2 registers.

RALM is updated on the falling edge of RPOHCLK.

• The LOS/LOF/LAIS signal indicates the loss of

signal (LOS), loss of frame (LOF) or line AIS

(LAIS) in the STS-12 (STM-4) SONET/SDH

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