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M2S56D40ATP Datasheet(PDF) 9 Page - Elpida Memory |
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M2S56D40ATP Datasheet(HTML) 9 Page - Elpida Memory |
9 / 41 page 9 DDR SDRAM E0338M10 (Ver.1.0) (Previous Rev.1.54E) Jan. '03 CP(K) M2S56D20/ 30/ 40ATP 256M Double Data Rate Synchronous DRAM M2S56D20/ 30/ 40AKT FUNCTION TRUTH TABLE (1/4) Current State /CS /RAS /CAS /WE Address Command Action Notes IDLE H X X X X DESEL NOP LH H H X NOP NOP L H H L BA TERM ILLEGAL 2 L H L X BA, CA, A10 READ / WRITE ILLEGAL 2 L L H H BA, RA ACT Bank Active, Latch RA L L H L BA, A10 PRE / PREA NOP 4 L L L H X REFA Auto-Refresh 5 LL L L Op-Code, Mode-Add MRS Mode Register Set 5 ROW ACTIVE H X X X X DESEL NOP LH H H X NOP NOP LH H L BA TERM NOP L H L H BA, CA, A10 READ / READA Begin Read, Latch CA, Determine Auto-Precharge L H L L BA, CA, A10 WRITE / WRITEA Begin Write, Latch CA, Determine Auto-Precharge L L H H BA, RA ACT Bank Active / ILLEGAL 2 L L H L BA, A10 PRE / PREA Precharge / Precharge All L L L H X REFA ILLEGAL LL L L Op-Code, Mode-Add MRS ILLEGAL H X X X X DESEL NOP (Continue Burst to END) L H H H X NOP NOP (Continue Burst to END) L H H L BA TERM Terminate Burst L H L H BA, CA, A10 READ / READA Terminate Burst, Latch CA, Begin New Read, Determine Auto- Precharge 3 L H L L BA, CA, A10 WRITE / WRITEA ILLEGAL L L H H BA, RA ACT Bank Active / ILLEGAL 2 L L H L BA, A10 PRE / PREA Terminate Burst, Precharge L L L H X REFA ILLEGAL LL L L Op-Code, Mode-Add MRS ILLEGAL READ(Auto- Precharge Disabled) |
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