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IS45S16400C1-7TA1 Datasheet(PDF) 6 Page - Integrated Silicon Solution, Inc |
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IS45S16400C1-7TA1 Datasheet(HTML) 6 Page - Integrated Silicon Solution, Inc |
6 / 55 page IS45S16400C1 ISSI® 6 Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 Rev. C 10/25/05 TRUTH TABLE – COMMANDS AND DQM OPERATION(1) FUNCTION CS CS CS CS CS RAS RAS RAS RAS RAS CAS CAS CAS CAS CAS WE WE WE WE WE DQM ADDR DQs COMMAND INHIBIT (NOP) H X X X X X X NO OPERATION (NOP) L H H H X X X ACTIVE (Select bank and activate row)(3) L L H H X Bank/Row X READ (Select bank/column, start READ burst) (4) LH LH L/H(8) Bank/Col X WRITE (Select bank/column, start WRITE burst) (4) L H L L L/H(8) Bank/Col Valid BURST TERMINATE L H H L X X Active PRECHARGE (Deactivate row in bank or banks) (5) L L H L X Code X AUTO REFRESH or SELF REFRESH (6,7) L L L H XXX (Enter self refresh mode) LOAD MODE REGISTER (2) L L L L X Op-Code X Write Enable/Output Enable (8) — — — — L — Active Write Inhibit/Output High-Z (8) — — — — H — High-Z NOTES: 1. CKE is HIGH for all commands except SELF REFRESH. 2. A0-A11 define the op-code written to the mode register. 3. A0-A11 provide row address, and BA0, BA1 determine which bank is made active. 4. A0-A7 (x16) provide column address; A10 HIGH enables the auto precharge feature (nonpersistent), while A10 LOW disables auto precharge; BA0, BA1 determine which bank is being read from or written to. 5. A10 LOW: BA0, BA1 determine the bank being precharged. A10 HIGH: All banks precharged and BA0, BA1 are “Don’t Care.” 6. AUTO REFRESH if CKE is HIGH, SELF REFRESH if CKE is LOW. 7. Internal refresh counter controls row addressing; all inputs and I/Os are “Don’t Care” except for CKE. 8. Activates or deactivates the DQs during WRITEs (zero-clock delay) and READs (two-clock delay). |
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