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W9751G6KB-25 Datasheet(PDF) 35 Page - Winbond |
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W9751G6KB-25 Datasheet(HTML) 35 Page - Winbond |
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35 / 87 page  W9751G6KB Publication Release Date: Sep. 03, 2012 - 35 - Revision A04 Function Truth Table, continued CURRENT STATE CS RAS CAS WE ADDRESS COMMAND ACTION NOTES Write Recovering H X X X X DSL NOP-> Bank active after tWR L H H H X NOP NOP-> Bank active after tWR L H L H BA, CA, A10 READ/READA ILLEGAL 1 L H L L BA, CA, A10 WRIT/WRITA New write L L H H BA, RA ACT ILLEGAL 1 L L H L BA, A10 PRE/PREA ILLEGAL 1 L L L H X REF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL Write Recovering with Auto- precharge H X X X X DSL NOP-> Precharge after tWR L H H H X NOP NOP-> Precharge after tWR L H L H BA, CA, A10 READ/READA ILLEGAL 1 L H L L BA, CA, A10 WRIT/WRITA ILLEGAL 1 L L H H BA, RA ACT ILLEGAL 1 L L H L BA, A10 PRE/PREA ILLEGAL 1 L L L H X REF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL Refreshing H X X X X DSL NOP-> Idle after tRC L H H H X NOP NOP-> Idle after tRC L H L H BA, CA, A10 READ/READA ILLEGAL L H L L BA, CA, A10 WRIT/WRITA ILLEGAL L L H H BA, RA ACT ILLEGAL L L H L BA, A10 PRE/PREA ILLEGAL L L L H X REF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL Mode Register Accessing H X X X X DSL NOP-> Idle after tMRD L H H H X NOP NOP-> Idle after tMRD L H L H BA, CA, A10 READ/READA ILLEGAL L H L L BA, CA, A10 WRIT/WRITA ILLEGAL L L H H BA, RA ACT ILLEGAL L L H L BA, A10 PRE/PREA ILLEGAL L L L H X REF/SELF ILLEGAL L L L L Op-Code MRS/EMRS ILLEGAL Notes: 1. This command may be issued for other banks, depending on the state of the banks. 2. All banks must be in “IDLE”. 3. Read or Write burst interruption is prohibited for burst length of 4 and only allowed for burst length of 8. Burst read/write can only be interrupted by another read/write with 4 bit burst boundary. Any other case of read/write interrupt is not allowed. Remark: H = High level, L = Low level, X = High or Low level ( Don‟t Care), V = Valid data. |
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