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AS4C8M16D1-5BCN Datasheet(PDF) 7 Page - Alliance Semiconductor Corporation |
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AS4C8M16D1-5BCN Datasheet(HTML) 7 Page - Alliance Semiconductor Corporation |
7 / 66 page Fully synchronous operations are performed to latch the commands at the positive edges of CK. Table 3 shows the truth table for the operation commands. 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) H X X V L Column address (A0 ~ A8) L H L L Write and AutoPrecharge Active(3) H X X V H L H L L Read Active(3) H X X V L Column address (A0 ~ A8) L H L H Read and Autoprecharge Active(3) H X X V H L H 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) H X X X X X L H H L Device Deselect Any H X X X X X H X X X 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 X X X X H X X X (SelfRefresh) L H H H Precharge Power Down Mode Entry Idle H L X X X X H X X X L H H H Precharge Power Down Mode Exit Any L H X X X X H X X X (PowerDown) L H H H Active Power Down Mode Entry Active H L X X X X H X X X L V V V Active Power Down Mode Exit Any L H X X X X H X X X (PowerDown) L H H H Data Input Mask Disable Active H X L X X X X X X X Data Input Mask Enable(5) Active H X H X X X X X X X 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 BA signal. 4. Device state is 2, 4, and 8 burst operation. 5. LDM and UDM can be enabled respectively. 128M DDR1 -AS4C8M16D1 |
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