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EDS1232ECBH-9ATT Datasheet(PDF) 15 Page - Elpida Memory |
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EDS1232ECBH-9ATT Datasheet(HTML) 15 Page - Elpida Memory |
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15 / 50 page  EDS1232ECBH-9ATT Preliminary Data Sheet E0878E10 (Ver. 1.0) 15 Function Truth Table The following table shows the operations that are performed when each command is issued in each mode of the SDRAM. The following table assumes that CKE is high. Current state /CS /RAS /CAS /WE Address Command Operation Precharge H × × × × DESL Enter IDLE after tRP L H H H × NOP Enter IDLE after tRP L H H L × BST ILLEGAL L H L H BA, CA, A10 READ/READA ILLEGAL* 3 L H L L BA, CA, A10 WRIT/WRITA ILLEGAL* 3 L L H H BA, RA ACT ILLEGAL* 3 L L H L BA, A10 PRE, PALL NOP* 5 L L L H × REF, SELF ILLEGAL L L L L MODE MRS ILLEGAL L L L L MODE EMRS ILLEGAL Idle H × × × × DESL NOP L H H H × NOP NOP L H H L × BST ILLEGAL L H L H BA, CA, A10 READ/READA ILLEGAL* 4 L H L L BA, CA, A10 WRIT/WRITA ILLEGAL* 4 L L H H BA, RA ACT Bank and row active L L H L BA, A10 PRE, PALL NOP L L L H × REF, SELF Refresh L L L L MODE MRS Mode register set* 8 L L L L MODE EMRS Extended mode register set* 8 Row active H × × × × DESL NOP L H H H × NOP NOP L H H L × BST ILLEGAL L H L H BA, CA, A10 READ/READA Begin read* 6 L H L L BA, CA, A10 WRIT/WRITA Begin write* 6 L L H H BA, RA ACT Other bank active ILLEGAL on same bank* 2 L L H L BA, A10 PRE, PALL Precharge* 7 L L L H × REF, SELF ILLEGAL L L L L MODE MRS ILLEGAL L L L L MODE EMRS ILLEGAL |
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