PM7375-SC datasheet(134/430 Pages) PMC

134 / 430 page

PM7375 LASAR-155

DATA SHEET

PMC-931127

ISSUE 6

LOCAL ATM SAR & PHYSICAL LAYER

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

118

ALGO2:

The ALGO2 bit position selects the framing algorithm used to determine and

maintain the frame alignment. When a logic one is written to the ALGO2 bit

position, the framer is enabled to use the second of the framing algorithms where

only the first A1 framing byte and the first 4 bits of the first A2 framing byte (12

bits total) are examined. This algorithm examines only 12 bits of the framing

pattern regardless; all other framing bits are ignored. When a logic zero is written

to the ALGO2 bit position, the framer is enabled to use the first of the framing

algorithms where all the A1 framing bytes and all the A2 framing bytes are

examined.

FOOF:

The FOOF bit controls the framing of the RSOP. When a logic one is written to

FOOF, the RSOP is forced out of frame at the next frame boundary. The FOOF

bit is a write only bit, register reads may yield a logic one or a logic zero.

DDS:

The DDS bit is set to logic one to disable the descrambling of the STS-3c (STM-

1) stream. When DDS is a logic zero, descrambling is enabled.

Reserved:

The reserved bit must be programmed to logic zero for proper operation.

PM7375-SC Datasheet(PDF) 134 Page - PMC-Sierra, Inc