T8207 Datasheet, PDF (36/158 Pages) Agere Systems – ATM Interconnect

CelXpres T8207
ATM Interconnect
Advance Data Sheet
September 2001
8 Look-Up Table (continued)
8.4 Extended Records
The length of the translation records may be extended to 16 bytes to support two cell counts for each translation
record. The lut_rec_form bits in the extended LUT configuration register (address 011Eh) are used to select this
extended mode. In extended (16-byte) mode, two 32-bit counters are appended to the 8-byte records.
The first counter in the translation record, total cell count, keeps a total count of all incoming cells received from the
UTOPIA bus and ultimately routed from this record. See the definition of the A and I bits in Section 8.2, Organiza-
tion.
The second counter, special cell count, is a subset of the total cell count counter. This counter counts only cells
whose PTI and CLP values in the cell header match the values specified in the extended LUT control register
(address 0120h). For example, this counter may be used to track specific F5 type OAM/RM cells and cells indicat-
ing forward congestion (EFCI = 1) or lower priority (CLP = 1).
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