PM5347 datasheet(34/302 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

Pin Name

Type

No.

Function

LOS

Output

186

The loss of signal (LOS) signal is set high when

loss of signal is declared. This occurs when a

violating period (20 ± 3 µs) of consecutive all

zeros bytes is detected on the incoming STS-3c/1

(STM-1) signal (before descrambling). LOS is

removed when two valid framing words (A1, A2)

are detected and during the intervening time, no

violating period of consecutive all zeros patterns

is detected. This alarm indication is also available

via register access. LOS is updated on the falling

edge of GROCLK.

LOF

Output

185

The loss of frame (LOF) signal is set high when

loss of frame is declared. This occurs when an

out-of-frame condition persists for a period of 3

ms. LOF is removed when an in-frame condition

persists for a period of 3 ms. This alarm indication

is also available via register access. LOF is

updated on the falling edge of GROCLK.

LAIS

Output

176

The line alarm indication signal (LAIS) is set high

when line AIS is declared. This occurs when a

111 binary pattern is detected in bits 6, 7, and 8

of the K2 byte for three or five consecutive frames

(as selected in the RLOP Control/Status register).

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. This alarm

indication is also available via register access.

LAIS is updated on the falling edge of GROCLK.

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