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EM658160TS-6 Datasheet(PDF) 5 Page - Etron Technology, Inc. |
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EM658160TS-6 Datasheet(HTML) 5 Page - Etron Technology, Inc. |
5 / 26 page Et r onT ech 4Mx16 DDR SDRAM EM658160 Etron Confidential 5 Rev. 1.1 Jan. 2002 Operation Mode Fully synchronous operations are performed to latch the commands at the positive edges of CK. Table 2 shows the truth table for the operation commands. Table 2. Truth Table (Note (1), (2) ) Command State CKEn-1 CKEn DM BS0,1 A10 A0-9,11 /CS /RAS /CAS /WE BankActivate Idle(3) H X X V Row address L L H H BankPrecharge Any H X X V L X L L H L PrechargeAll Any H X X X H X L L H L Write Active(3) HX X V L L H L L Write and AutoPrecharge Active(3) HX X V H Column address (A0 ~ A7) LH L L Read Active(3) HX X V L L H L H Read and Autoprecharge Active(3) HX X V H Column address (A0 ~ A7) LH L H Mode Register Set Idle H X X OP code L L L L Extended MRS Idle H X X OP code L L L L No-Operation Any H X X X X X L H H H Burst Stop Active(4) HX X X X X L H H L Device Deselect Any H X X X X X H XXX AutoRefresh Idle H H X X X X L L L H SelfRefresh Entry Idle H L X X X X L L L H SelfRefresh Exit Idle L H XX X X H XXX (SelfRefresh) LH H H Clock Suspend Mode Entry Active H L XX X X X XXX Power Down Mode Entry Any(5) H L XX X X H XXX LH H H Clock Suspend Mode Exit Active L H XX X X X XXX Power Down Mode Exit Any L H X X X X H XXX (PowerDown) LH H H Data Write/Output Enable Active H X L X XXX X X X Data Mask/Output Disable Active H X H X XXX X X X Note: 1. V=Valid data, X=Don't Care, L=Low level, H=High level 2. CKEn signal is input level when commands are provided. CKEn-1 signal is input level one clock cycle before the commands are provided. 3. These are states of bank designated by BS signal. 4. Device state is 1, 2, 4, 8, and full page burst operation. 5. Power Down Mode can not enter in the burst operation. When this command is asserted in the burst cycle, device state is clock suspend mode. |
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