S/UNI®-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
Name
Description
when generating OAM cells, if header translation is disabled. If the
connection is a UNI, the first four bits of the VPI field should be set to zero.
Field B [11:0]
This field is compared against the Field B extracted from the cell during the
search. If the Field B from the VC table and the Field B from the incoming
cell do not match, the search is considered invalid and the cell is dropped,
with an optional copy to the microprocessor. Any unused bits in this field
should be set to logic 0. If Field B is configured to be less than 12 bits, the
data should be LSB justified in this field.
Bwds VCRA [15:0]
The Backwards Direction VCRA indicates the VC Record Address of the
corresponding VC in the opposite-direction S/UNI-ATLAS-3200. If the
OBCIF_Bwd_VCRA bit is logic 1 in the Cell Processor Routing
Configuration register, this field will be inserted, along with the PHY ID and
other routing information, in prepended bytes of cells sent to the Backwards
Cell Interface, to permit the opposite-direction S/UNI-ATLAS-3200 to identify
the cell without performing a search on it. If OBCIF_Bwd_VCRA is logic 1,
then it is expected that Search_From_IBCIF will be logic 0 in the opposite-
direction S/UNI-ATLAS-3200.
VC Table CRC-10 [9:0]
Cell Count 1 and 2 [31:0]
This field provides a CRC-10 over the VC table in DRAM. If a CRC-10 error
occurs, the DRAM_CRC_Err bit is set, an interrupt is raised, and the
connection is optionally rendered inactive, depending on the setting of the
Inactivate_On_DRAM_Err bit in the Cell Processor Configuration Register.
These fields contain the billing cell counts, configured by the Cell Counting
Configuration register bits. The Count Config Select field in the VC Record
Table’s Configuration field selects between the possible configurations .
The Alternate counts are intended for use in time-of-day billing. When the
Alternate_Count register bit is set to logic 1, the Cell Count fields in all VC
records stop being incremented, and the Alternate Cell Count fields are
incremented instead. The handover is done in such a way that no cell
counts are missed.
Alternate Cell Count 1 and 2
[31:0]
These counts represent the number of cells received, including cells from
the BCIF, and cells from the MCIF (assuming PROC_CELL = 1). This
counting occurs before policing is evaluated. The non-compliant cell counts
can be subtracted to determine the state of the counts after policing.
Cells received on connections with the Active bit equal to logic 0 will not be
counted.
Received End-to-End Defect This field is used to store the Defect Location from a received end-to-end
Location [127:0]
AIS or RDI cell.
In the case of received AIS cells, this field is used in RDI cells generated
due to End-To-End AIS declaration, via the AUTO_RDI function. If RDI cell
generation is forced (using either the send_RDI table bits or the per-phy RDI
register bits) or generated by the CC_AIS_RDI process, the contents of the
global Generated Defect Location registers will be used. If the connection is
an F4 being split out into F5s, then this field is used to determine the Defect
Location of F5 AIS and RDI cells sent due to F4 End-to-End AIS declaration.
In the case of received RDI cells, the defect location is simply stored for
future retrieval. Defect locations from RDI cells will not be stored if End-to-
end AIS alarm has been declared, and will be overwritten on the arrival of
AIS cells, so this field is only valid for RDI cells if End-to-end RDI alarm is
declared and End-to-end AIS alarm is not.
Received End-to-End AIS
Defect Type [7:0]
This field is used to store the Defect Type from a received end-to-end AIS or
RDI cell.
In the case of received AIS cells, this field is used in RDI cells generated
due to End-To-End AIS declaration, via the AUTO_RDI function. If RDI cell
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
89
PMC [ PMC-SIERRA, INC ]
