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AS4C64M8D2 Datasheet(PDF) 4 Page - Alliance Semiconductor Corporation |
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AS4C64M8D2 Datasheet(HTML) 4 Page - Alliance Semiconductor Corporation |
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4 / 59 page  AS4C64M8D2 Confidential 4 Rev. 1.0 Feb. /2014 Figure 3. State Diagram (E)MRS Setting MR, EMR(1) EMR(2) EMR(3) OCD calibration Initialization Sequence Idle All banks precharged Self Refreshing Refreshing Precharge Power Down Activating Active Power Down Bank Active Writing Writing With Autoprecharge Precharging Reading With Autoprecharge Reading ACT CKE L CKEH CKEL WR RDA RD A WR A WR RD RD PR, PRA PR, PRA PR, PRA RDA WRA CK EL CKE H CKE L SRF CKE H REF CKEL WR RD PR CKEL CKEL Automatic Sequence Cammand Sequence CKEL = CKE LOW, enter Power Down CKEH = CKE HIGH, exit Power Down,exit Self Refresh ACT = Activate WR(A) = Write (with Autoprecharge) RD(A) = Read (with Autoprecharge) PR(A) = Precharge (All) (E)MRS = (Extended) Mode Register Set SRF = Enter Self Refresh REF = Refresh Note: Use caution with this diagram. It is indented to provide a floorplan of the possible state transitions and the commands to control them, not all details. In particular situations involving more than one bank, enabling/disabling on-die termination, Power Down entry/exit, timing restrictions during state transitions, among other things, are not captured in full detail. |
Similar Part No. - AS4C64M8D2 |
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Similar Description - AS4C64M8D2 |
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