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VG3617801CT Datasheet(PDF) 9 Page - Vanguard International Semiconductor |
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VG3617801CT Datasheet(HTML) 9 Page - Vanguard International Semiconductor |
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9 / 68 page  Document:1G5-0133 Rev.1 Page 9 VIS VG3617801CT 16Mb CMOS Synchronous Dynamic RAM 2.4 Operative Command Table Notes 1 Current state CS RAS CAS WE Address Command Action Notes Idle H X X X X DESL Nop or Power down 2 L H H X X NOP or BST Nop or Power down 2 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 BR,RA ACT Row active L L H L BA,A10 PRE/PALL Nop L L L H X REF/SELF Refresh or Self refresh 4 L L L L Op-Code MPS Mode register access Row active H X X X X DESL Nop L H H X X NOP or BST Nop L H L H BA,CA,A10 READ/READA Begin read:Determine AP 5 L H L L BA,CA,A10 WRIT/WRITA Begin write:Determine AP 5 L L H H BA,RA ACT ILLEGAL 3 L L H L BA,A10 PRE/PALL Precharge 6 L L L H X REF/SELF ILLEGAL L L L L Op-Code MRS ILLEGAL Read H X X X X DESL Continue burst to active L H H H X NOP Continue burst to active L H H L X BST Burst active L H L H BA,CA,A10 READ/READA Term burst, new read:Determine AP 7 L H L L BA,CA,A10 WRIT/WRITA Term burst, start write:Determine AP 7,8 L L H H BA,RA ACT ILLEGAL 3 L L H L BA,A10 PRE/PALL Term burst,precharging L L L H X REF/SELF ILLEGAL L L L L Op-Code MRS ILLEGAL Write H X X X X DESL Continue burst to recovering L H H H X NOP Continue burst to recovering L H H L X BST Burst active L H L H BA,CA,A10 READ/READA Term burst, start read: determine AP 7,8 L H L L BA,CA,A10 WRIT/WRITA Term burst, new write:Determine AP 7 L L H H BA,RA ACT ILLEGAL 3 L L H L BA,A10 PRE/PALL Term burst precharging 9 L L L H X REF/SELF ILLEGAL L L L L Op-Code MRS ILLEGAL end Row → end Row → stop Row → end write → end Write → stop Row → (1/3) |
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