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TNETX15VE 数据表(PDF) 10 Page - Texas Instruments |
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TNETX15VE 数据表(HTML) 10 Page - Texas Instruments |
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10 / 113 page  TNETX15VE VLAN-ENGINE ADDRESS-LOOKUP DEVICE SPWS028B – APRIL 1997 – REVISED SEPTEMBER 1997 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions (Continued) external SRAM interface TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION EA20 24 EA20 indicates an internal or external RAM access. 0 = external, 1 = internal. EA19† 23 EA18 22 EA17 21 EA16 20 EA15 19 EA14 17 EA13 16 EA12 15 EA11 14 EA10 13 O External address bus. EA20–EA0 is the external SRAM address bus. This bus is always driven except EA9 12 y during reset. EA8 10 EA7 9 EA6 8 EA5 7 EA4 6 EA3 5 EA2 3 EA1 2 EA0‡ 1 ED15† 134 ED14 133 ED13 132 ED12 131 ED11 130 ED10 128 ED9 127 ED8 126 I/O External data bus ED15 ED0 is the external SRAM data bus ED7 125 I/O External data bus. ED15–ED0 is the external SRAM data bus. ED6 124 ED5 123 ED4 121 ED3 120 ED2 119 ED1 118 ED0‡ 117 EOE 136 O External output enable. EOE is the active-low external SRAM output-enable signal. EWE 137 O External write enable. EWE is the active-low external SRAM write-enable signal. † Most-significant bit ‡ Least-significant bit |
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