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TMS44400 数据表(PDF) 21 Page - Texas Instruments |
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TMS44400 数据表(HTML) 21 Page - Texas Instruments |
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21 / 25 page ![]() TMS44400, TMS44400P, TMS46400, TMS46400P 1048576-WORD BY 4-BIT DYNAMIC RANDOM-ACCESS MEMORIES SMHS562C – MAY 1995 – REVISED NOVEMBER 1996 21 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 PARAMETER MEASUREMENT INFORMATION tDHR RAS CAS A0 – A9 W DQ1 – DQ4 OE Row Col Don’t Care Don’t Care Refresh Cycle Memory Cycle Refresh Cycle tRAS tRP tRAS tRP tCHR tCAS tCAH tASC tRAH tWP tWSR tWHR tDH tDS tWCH tAR tWCR Valid Data Don’t Care tRRH tWCS tASR Figure 15. Hidden-Refresh-Cycle (Write) Timing |
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