M7040N datasheet(3/159 Pages) STMICROELECTRONICS

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M7040N

REGISTERS . ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....22

Comparand Registers .... ...... ....... ...... ....... ...... ....... ...... ...... .... 23

Comparand Register Selection During SEARCH and LEARN Instructions (Figure 13.) ..... ....23

Mask Registers ... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....23

Addressing the Global Masks Register Array (Figure 14.) . . ...... ....... ...... ...... ....23

SEARCH-Successful Registers (SSR[0:7]) . ...... ....... ...... ....... ...... ...... .... 24

SEARCH-Successful Register (SSR) Description (Table 10.)...... ....... ...... ...... ....24

The Command Register .. ...... ....... ...... ....... ...... ....... ...... ...... ....25

Command Register Field Descriptions (Table 11.) . ....... ...... ....... ...... ...... ....25

The Information Register .. ...... ....... ...... ....... ...... ....... ...... ...... ....26

Information Register Field Descriptions (Table 12.) ....... ...... ....... ...... ...... ....26

The Read BurstAddress Register (RBURREG) ... ....... ...... ....... ...... ...... ....27

Read BurstRegister Description (Table 13.) ...... ....... ...... ....... ...... ...... ....27

The Write Burst Address Register (WBURREG). . . ....... ...... ....... ...... ...... ....27

Write Burst Register Description (Table 14.) ...... ....... ...... ....... ...... ...... ....27

The NFA Register . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....27

NFARegister (Table 15.). . ...... ....... ...... ....... ...... ....... ...... ...... ....27

SEARCH ENGINE ARCHITECTURE . ....... ...... ....... ...... ....... ...... ...... ....28

Data and Mask Addressing ...... ....... ...... ....... ...... ....... ...... ...... ....28

M7040N Database Width Configuration (Figure 15.) ...... ...... ....... ...... ...... ....28

Bit Position Match (Table 16.) .... ....... ...... ....... ...... ....... ...... ...... ....29

Multi-width Configuration Example (Figure 16.) ... ....... ...... ....... ...... ...... .... 29

M7040N Data and Mask ArrayAddressing (Figure 17.) .... ...... ....... ...... ...... .... 29

COMMAND CODES AND PARAMETERS .... ...... ....... ...... ....... ...... ...... ....30

Command Codes. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....30

Commandsand Command Parameters ... ...... ....... ...... ....... ...... ...... ....30

Command Codes(Table 17.) .... ....... ...... ....... ...... ....... ...... ...... ....30

Command Parameters (Table 18.) ....... ...... ....... ...... ....... ...... ...... ....31

READ COMMAND.... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....32

Single Location READ Cycle Timing (Figure 18.) . . ....... ...... ....... ...... ...... ....33

BurstREAD of the Data and Mask Arrays (BLEN = 4) (Figure 19.) . ....... ...... ...... ....33

READ Command Parameters (Table 19.) . . ...... ....... ...... ....... ...... ...... ....34

Data and Mask Array, SRAM Read AddressFormat(Table 20.) ... ....... ...... ...... ....34

READ AddressFormat for Internal Registers(Table 21.) ... ...... ....... ...... ...... ....35

READ AddressFormat for Data and MaskArrays (Table 22.) ..... ....... ...... ...... ....35

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