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M13L32321A-2G Datasheet(PDF) 43 Page - Elite Semiconductor Memory Technology Inc. |
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M13L32321A-2G Datasheet(HTML) 43 Page - Elite Semiconductor Memory Technology Inc. |
43 / 48 page ESMT M13L32321A (2G) Elite Semiconductor Memory Technology Inc. Publication Date : Oct. 2012 Revision : 1.0 43/48 Power up & Initialization Sequence (based on DDR400) VDDQ VREF A0 - A 7 , A9 P o w e r - up: VDD a n d CL K s t a b l e BA E x t e nde d Mo d e Re g i s t e r Se t COMMAND DM DQ S t MR D t MR D 20 0 c y c le s o f C L K * * Load Mo d e R egi ster Re s e t D L L (w i t h A 8 = H ) L oad Mo de R egis t er ( w it h A 8=L) VDD A8 T = 200u s VTT (system*) tVDT >=0 CLK CLK CKE NOP t CH t CL t CK t IS t IH PRE EMRS MRS PRE AR AR MRS ACT t IH t IS CODE t IH t IS LV C O M S L O W L E VEL CODE CODE RA t IH t IS CODE CODE CODE RA t IH t IS t IH t IS H i gh- Z DQ Hi g h - Z t RP t RF C t MR D ALL BANKS ALL BANKS t RF C t IH t IS : D on’ t c a r e 1 1 10 1B3 2 R . A BA Notes: * = VTT is not applied directly to the device, however tVTD must be greater than or equal to zero to avoid device latch-up. ** = tMRD is required before any command can be applied, and 200 cycles of CLK are required before an executable command can be applied. The two Auto Refresh commands may be moved to follow the first MRS but precede the second PRECHARGE ALL command. |
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