VSC7440 datasheet(80/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

The VCAP IS2 has 16 default rules. The address of default rule number n is (7584 + 16 × n). When

submitting a key to the VCAP IS2, the analyzer simultaneously determines which default rule to hit if the

key does not match any entries. If no resources (blocks) were assigned to VCAP IS2, there can be no

matches and default rules will be hit.

3.12.3.3 VCAP LPM

The following table lists the parameters that apply to the VCAP LPM.

The type-group field must be inserted into entries when programming rules, because the VCAP LPM

supports more than one entry size.

e[212:177]

e[211:176]

e[248:213]

e[247:212]

e[284:249]

e[283:248]

e[317:284]

e[353:318]

e[389:354]

e[425:390]

e[460:426]

e[496:461]

e[532:497]

e[568:533]

Table 48 •

VCAP LPM Parameters

Parameter

Description

Number of VCAP addresses

1,024 per block that is allocated to this VCAP

Width of entry

36 bit per address

Width of action

70 bit per address

Counter-type

1 bit saturating counter

Supported entry sizes

X1, X2, X4, X8

Supported action sizes

Associated register target

VCAP_SUPER

Table 49 •

VCAP LPM Entry Type-Group Fields

Address Offset

Size

Entry Type Group

Description

0b1

Software must insert 1 bit with the value 1 into

first address of all X1 entries.

0b10

Software must insert 2 bit with the value 2 into

first address of all X2 entries.

0b100

Software must insert 3 bit with the value 4 into

first address of all X4 entries.

0b1000

Software must insert 4 bit with the value 8 into

first address of all X8 entries.

Table 47 •

VCAP IS2 Entry/Action Bit Distribution (continued)

Address Offset

X16

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