PM5347 datasheet(62/302 Pages) PMC

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PM5347 S/UNI-PLUS

DATA SHEET

PMC-941033

ISSUE 6

SATURN USER NETWORK INTERFACE PLUS

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

Loss of Frame

The Loss of Frame Block monitors the in-frame / out-of-frame status of the

Framer Block. A loss of frame (LOF) is declared when an out-of-frame condition

persists for 3 ms. The LOF is cleared when an in-frame condition persists for a

period of 3 ms. To provide for intermittent out-of-frame (or in-frame) conditions,

the 3 ms timer is not reset to zero until an in-frame (or out-of-frame) condition

persists for 3 ms. LOF is updated on the falling edge of GROCLK.

9.4

Receive Line Overhead Processor

The Receive Line Overhead Processor (RLOP) provides line level alarm and

performance monitoring. In addition, it extracts the line orderwire channel and the

line data communication channel from the line overhead and provides it serially

on outputs RLOW and RLD respectively.

Line RDI Detect

The Line RDI Detect Block detects the presence of Line Remote Defect

Indication (LRDI) in the receive stream. Output LRDI is asserted when a 110

binary pattern is detected in bits 6, 7, and 8 of the K2 byte, for three or five

consecutive frames. LRDI is removed when any pattern other than 110 is

detected in bits 6, 7, and 8 of the K2 byte for three or five consecutive frames.

LRDI is updated on the falling edge of GROCLK.

Line AIS Detect

The Line AIS Block detects the presence of a Line Alarm Indication Signal (LAIS)

in the receive stream. Output LAIS is asserted when a 111 binary pattern is

detected in bits 6, 7, and 8 of the K2 byte, for three or five consecutive frames.

LAIS is removed when any pattern other than 111 is detected in bits 6, 7, and 8

of the K2 byte for three or five consecutive frames. LAIS is updated with on the

falling edge of GROCLK.

Automatic Protection Switch Control Block

The Automatic Protection Switch Control (APSC) Block filters and captures the

receive automatic protection switch channel bytes (K1 and K2) allowing them to

be read via the S/UNI-PLUS Receive K1 Register and the S/UNI-PLUS Receive

K2 Register. The bytes are filtered for three frames before being written to these

registers. A protection switching byte failure alarm is declared when twelve

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