PM5380-BI PMC-Sierra, Inc., PM5380-BI Datasheet - Page 346

• Manufacturer Part Number: PM5380-BI
• Description: Network Interface, SATURN User Network Interface (8x155) Telecom Standard Product
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC- 2010299, Issue 2
ALGO2:
FOOF:
DDS:
BLKBIP:
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 last 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.
The FOOF bit controls the framing of the RAOP. When a logic one is written to FOOF, the
RAOP 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.
The DDS bit is set to logic one to disable the descrambling of the APS stream stream.
When DDS is a logic zero, descrambling is enabled.
The BLKBIP bit position enables the accumulating of section BIP word errors. When a
logic one is written to the BLKBIP bit position, one or more errors in the BIP-8 byte result
in a single error being accumulated in the B1 error counter. When a logic zero is written to
the BLKBIP bit position, all errors in the B1 byte are accumulated in the B1 error counter.
S/UNI®-8x155 ASSP Telecom Standard Product Data Sheet
Released
346