Datenblatt-Suchmaschine für elektronische Bauteile |
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AD484M1644VTA-10LI Datenblatt(PDF) 10 Page - List of Unclassifed Manufacturers |
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AD484M1644VTA-10LI Datenblatt(HTML) 10 Page - List of Unclassifed Manufacturers |
10 / 20 page Preliminary 10 64Mb SDRAM Ascend Semiconductor Corporation Command Symbol CKE Ignore Command DESL No operation NOP Truth Table 1. Command Truth Table ( AD484M1644VTA ) H H X n-1 n /CS H L X /RAS X H /CAS X H /WE X H BA0, BA1 X X A10 X X A11, A9~A0 X X Burst stop BSTH Read READ H H X L L X H H H L L H X V X L X V Read with auto pre-charge READA Write WRIT H H X L L X H H L L H L V V H L V V Write with auto pre-charge WRITA Bank activate ACT H H X L L X L L H H H H V V H V V V Pre-charge select bank PRE H L X L H L V L X Pre-charge all banks PALL Mode register set MRS H H X L L X L L H L L L X L H L X V Note : H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data input Command Symbol CKE Data write / output enable ENB Data mask / output disable MASK 2. DQM Truth Table H H X n-1 n /CS H L X Upper byte write enable / output enable BSTH Read READ H H X L L X Read with auto pre-charge READA Write WRIT H H X L L X Write with auto pre-charge WRITA Bank activate ACT H H X L L X Pre-charge select bank PRE H L X Pre-charge all banks PALL Mode register set MRS H H X L L X Note : H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data input Command Symbol CKE Activating Any 3. CKE Truth Table H L L n-1 n /CS X X L /RAS X X /CAS X X /WE X X Addr. X X Clock suspend Idle REF L H H X L H X L X L X H X X Idle SELF Self refresh H L L L L H L H L H H H X X Idle Power down H L L X X H X X X X X X X X Remark H = High level, L = Low level, X = High or Low level (Don't care) Command Clock suspend mode entry Clock suspend mode Clock suspend mode exit CBR refresh command Self refresh entry Self refresh exit Power down entry Power down exit L H H X X X X |
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