M7040N datasheet(5/159 Pages) STMICROELECTRONICS

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M7040N

144-bit Search on Tables Configured as x144 Using Up to 31 M7040N Devices. ...... .... 74

Hit/Miss Assumption (Table 39.) . . ....... ...... ....... ...... ....... ...... ...... ....75

Hardware Diagram for a Table with 31 Devices (Figure 52.) ...... ....... ...... ...... ....76

Hardware Diagram for a Block ofUp to Eight Devices (Figure 53.) . ....... ...... ...... ....77

x144 Table with 31 Devices (Figure 54.) ... ...... ....... ...... ....... ...... ...... ....78

Timing Diagrams for x144 Using Up to 31 M7040N Devices ...... ....... ...... ...... ....79

Latency ofSEARCH from Instruction to SRAM Access Cycle, 144-bit (Table 40.)... ...... ....90

ShiftofSSF and SSV from SADR (Table 41.)..... ....... ...... ....... ...... ...... ....90

288-bit SEARCH on Tables Configured as x288 Using a Single M7040N Device ...... ....90

Hardware Diagram for a Table with One Device (Figure 66.) ...... ....... ...... ...... ....91

Timing Diagram for 288-bit SEARCH (One Device) (Figure 67.) ... ....... ...... ...... ....92

x288 Table with One Device (Figure 68.) . . ...... ....... ...... ....... ...... ...... ....93

Latency ofSEARCH from Cycles Cand D to SRAM Access Cycle (Table 42.) ..... ...... ....93

ShiftofSSF and SSV from SADR (Table 43.)..... ....... ...... ....... ...... ...... ....93

288-bit SEARCH on Tables x288-configured Using Up to Eight M7040N Devices ..... ....94

Hit/Miss Assumption (Table 44.) . . ....... ...... ....... ...... ....... ...... ...... ....95

Hardware Diagram for a Table with Eight Devices(Figure 69.) .... ....... ...... ...... ....96

x288 Table with Eight Devices(Figure 70.) . ...... ....... ...... ....... ...... ...... .... 97

Timing Diagrams for x288-configured Using Up to Eight M7040N Devices . . ...... ...... ....98

Latency ofSEARCH from Cycles Cand D to SRAM Access Cycle, 288-bit (Table 45.)..... ...101

ShiftofSSF and SSV from SADR (Table 46.)..... ....... ...... ....... ...... ...... ...101

288-bit Search on Tables Configured as x288 Using Up to 31 M7040N Devices. ...... ... 101

Hit/Miss Assumption (Table 47.) . . ....... ...... ....... ...... ....... ...... ...... ...103

Hardware Diagram for a Table with 31 Devices (Figure 74.) ...... ....... ...... ...... ...103

Hardware Diagram for a Block ofUp to Eight Devices (Figure 75.) . ....... ...... ...... ...104

x288 Table with 31 Devices (Figure 76.) ... ...... ....... ...... ....... ...... ...... ...105

Timing Diagrams for x288 Using Up to 31 M7040N Devices ...... ....... ...... ...... ...106

Latency ofSEARCH from Cycles Cand D to SRAM Access Cycle, 288-bit (Table 48.)..... ...117

ShiftofSSF and SSV from SADR (Table 49.)..... ....... ...... ....... ...... ...... ...117

MIXED SEARCHES. . . ...... ...... ....... ...... ....... ...... ....... ...... ...... ...117

Tables Configured with DifferentWidths Using an M7040N with CFG_L LOW ..... ...... ...117

Tables Configured to Different Widths using an M7040N with CFG_L HIGH. ...... ...... ... 117

Timing Diagram for Mixed SEARCH (One Device) (Figure 88.) .... ....... ...... ...... ...118

Multi-Width Configurations Example (Figure 89.) .. ....... ...... ....... ...... ...... ...119

Searches with CFG_L Set HIGH (Table 50.)...... ....... ...... ....... ...... ...... ...119

LRAM ANDLDEVDESCRIPTION ... ....... ...... ....... ...... ....... ...... ...... ... 119

LEARN COMMAND . . ...... ...... ....... ...... ....... ...... ....... ...... ...... ...120

Timing Diagram ofLEARN: TLSZ = 00 (Figure 90.) ....... ...... ....... ...... ...... ...121

Timing Diagram ofLEARN: TLSZ = 01 (Except on the LastDevice) (Figure 91.).... ...... ...122

Timing Diagram ofLEARN on Device 7:TLSZ = 01 (Figure 92.) ... ....... ...... ...... ...123

Latency ofSRAM WRITE Cycle from Second Cycle ofLEARN Instruction (Table 51.) ..... ...123

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