PM5357 datasheet(72/432 Pages) PMC

72 / 432 page

PRODUCTION

S/UNI-622-POS

PMC-Sierra, Inc.

PM5357

S/UNI-622-POS

DATASHEET

PMC-1980911

ISSUE 5

SATURN USER NETWORK INTERFACE (622-POS)

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND 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 (OOF)

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. The LOF and OOF signals are optionally reported on

the RALRM output pin when enabled by the LOFEB and OOFEN Receive Alarm

Control Register bits.

10.3 Receive Line Overhead Processor (RLOP)

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

performance monitoring. In addition, it extracts the line data communication

channel from the line overhead and provides it serially on output RLD.

Line RDI Detect

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

Indication (LRDI) in the receive stream. Line RDI is declared when a 110 binary

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

frames. Line RDI 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. The LRDI signal

is optionally reported on the RALRM output pin when enabled by the LRDIEN

Receive Alarm Control Register bit.

Line AIS Detect

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

in the receive stream. Line AIS is declared when a 111 binary pattern is detected

in bits 6, 7, and 8 of the K2 byte, for three or five consecutive frames. Line AIS 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. The LAIS signal is optionally reported

on the RALRM output pin when enabled by the LAISEN Receive Alarm Control

Data Link Extract Block

The Data Link Extract Block extracts the line data communication channel (bytes

D4 to D12) from the STS-12c/STM-4-4c stream. The extracted bytes are

serialized and output on the RLD output at a nominal 576 kbit/s rate. Timing for

downstream processing of the data communication channel is provided by the

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