S/UNI®-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
The intention is that the microprocessor use these rollover entries to maintain the most-significant
bits of the counters in its own memory. The least-significant bits can be accessed by the
microprocessor in the normal way whenever precise counts are needed. Maskable interrupts are
provided when the Rollover FIFO is not empty, when it is half full, and when it is nearly full.
There are four possible sources of Rollover FIFO entries: Per-VC counts, Per-PHY counts, PM
session 2, or PM session 1. The source of the entry determines its format, and is determined by
the setting of bits 30:29 of the entry. The most significant bit of the Source field is reserved for
future use. Each source has an associated Rollover FIFO Enable bit to control whether entries are
permitted from that source.
Per-VC counts include the 32-bit general cell counts and the 16-bit Policing Non-Compliant
counts. The format of a Per-VC rollover FIFO entry is as follows:
Table 35 Count Rollover FIFO Format For Per-VC Count Entries
Bit
Field
Description
31
Reserved
30:29
28
27:12
Source
Reserved
Address
“00” for a per-VC count entry
The 16-bit VC Record address that generated this entry
11:7
6
5
4
3
Unused
Non-Compliant 3
Non-Compliant 2
Non-Compliant 1
Alternate Count2
Alternate Count1
Count2
When ‘1’, Policing Non-Compliant Count 3 had its MSB set.
When ‘1’, Policing Non-Compliant Count 2 had its MSB set.
When ‘1’, Policing Non-Compliant Count 1 had its MSB set.
When ‘1’, per-VC Alternate Count 2 had its MSB set
When ‘1’, per-VC Alternate Count 1 had its MSB set
When ‘1’, per-VC Count 2 had its MSB set
2
1
0
Count1
When ‘1’, per-VC Count 1 had its MSB set
Per-PHY counts include Per-PHY policing counts and the per-PHY counts of received CLP0
cells, CLP1 cells, etc. The format of a per-PHY rollover FIFO entry is as follows:
Table 36 Count Rollover FIFO Format For Per-PHY Count Entries
Bit
31
Field
Reserved
Description
30:29
28:23
22:11
10
Source
PHY Address
Unused
TIMEOUT
EFCI_NZGFC
“01” for a per-PHY count entry
The 6-bit PHY address that generated this entry
When ‘1’, the MSB of the Timed-Out Cell Count was set.
When ‘1’, the MSB of the EFCI/Non-Zero GFC Cell Count was set.
9
8
Invalid
When ‘1’, the PHY Invalid VPI/VCI/PTI (Search Error, Unprovisioned
VPI_VCI_PTI
or Inactive connection, or Reserved VCI/PTI) count had its MSB set.
7
Bad OAM_RM
When ‘1’, the PHY Errored RM/OAM cells count had its MSB set.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
131
PMC [ PMC-SIERRA, INC ]
