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EM422M1684RBA-75FE Datasheet(PDF) 11 Page - Eorex Corporation |
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EM422M1684RBA-75FE Datasheet(HTML) 11 Page - Eorex Corporation |
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11 / 19 page  eorex Preliminary EM42AM1684RBA Jul. 2006 www.eorex.com 11/19 3. Operative Command Table Current State /CS /R /C /W Addr. Command Action H X X X X DESL NOP L H H H X NOP NOP L H H L X TERM NOP L H L X BA/CA/A10 READ/WRIT/BW ILLEGAL (Note 1) L L H H BA/RA ACT Bank active,Latch RA L L H L BA, A10 PRE/PREA NOP (Note 3) L L L H X REFA Auto refresh (Note 4) Idle L L L L Op-Code, Mode-Add MRS Mode register H X X X X DESL NOP L H H H X NOP NOP L H H L BA/CA/A10 READ/READA Begin read,Latch CA, Determine auto-precharge L H L L BA/CA/A10 WRIT/WRITA Begin write,Latch CA, Determine auto-precharge L L H H BA/RA ACT ILLEGAL (Note 1) L L H L BA/A10 PRE/PREA Precharge/Precharge all L L L H X REFA ILLEGAL Row Active L L L L Op-Code, Mode-Add MRS ILLEGAL H X X X X DESL NOP(Continue burst to end) L H H H X NOP NOP(Continue burst to end) L H H L X TERM Terminal burst L H L H BA/CA/A10 READ/READA Terminate burst,Latch CA, Begin new read, Determine Auto-precharge L L H H BA/RA ACT ILLEGAL (Note 1) L L H L BA, A10 PRE/PREA Terminate burst, PrecharE L L L H X REFA ILLEGAL Read L L L L Op-Code, Mode-Add MRS ILLEGAL H X X X X DESL NOP(Continue burst to end) L H H H X NOP NOP(Continue burst to end) L H H L X TERM ILLEGAL L H L H BA/CA/A10 READ/READA Terminate burst with DM=”H”,Latch CA,Begin read,Determine auto-precharge (Note 2) L H L L BA/CA/A10 WRIT/WRITA Terminate burst,Latch CA,Begin new write, Determine auto-precharge (Note 2) L L H H BA/RA ACT ILLEGAL (Note 1) L L H L BA, A10 PRE/PREA Terminate burst with DM=”H”, Precharge L L L H X REFA ILLEGAL Write L L L L Op-Code, MRS ILLEGAL |
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