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EM428M1684RTA-75FE Datasheet(PDF) 10 Page - Eorex Corporation |
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EM428M1684RTA-75FE Datasheet(HTML) 10 Page - Eorex Corporation |
10 / 19 page eorex EM42AM1684RTA Jul. 2006 www.eorex.com 10/19 1. Command Truth Table CKE Command Symbol n-1 n /CS /RAS /CAS /WE BA0, BA1 A10 A12~A0 Ignore Command DESL H X H X X X X X X No Operation NOP H X L H H H X X X Burst Stop BSTH H X L H H L X X X Read READ H X L H L H V L V Read with Auto Pre-charge READA H X L H L H V H V Write WRIT H X L H L L V L V Write with Auto Pre-charge WRITA H X L L H H V H V Bank Activate ACT H X L L H H V V V Pre-charge Select Bank PRE H X L L H L V L X Pre-charge All Banks PALL H X L L H L X H X Mode Register Set MRS H X L L L L L L V H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data input 2. CKE Truth Table CKE Item Command Symbol n-1 n /CS /RAS /CAS /WE Addr. Idle CBR Refresh Command REF H H L L L H X Idle Self Refresh Entry SELF H L L L L H X L H L H H H X Self Refresh Self Refresh Exit L H H X X X X Idle Power Down Entry H L X X X X X Power Down Power Down Exit L H X X X X X Remark H = High level, L = Low level, X = High or Low level (Don't care) |
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