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AS4C4M16D1A-5TAN Datasheet(PDF) 7 Page - Alliance Semiconductor Corporation |
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AS4C4M16D1A-5TAN Datasheet(HTML) 7 Page - Alliance Semiconductor Corporation |
7 / 54 page Operation Mode 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. Table 3. Truth Table (Note (1), (2)) Command State CKEn-1 CKEn DM BA0,1 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) H X X V L Column address (A0 ~ A7) 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 ~ A7) L H L H Read and Autoprecharge Active(3) H X X V H L H L H (Extended) Mode Register Set 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 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 BA signal. 4. Device state is 2, 4, 8, burst operation. 5. LDM and UDM can be enabled respectively. AS4C4M16D1A-5TAN Confidential - 7/54 - Rev.1.0 Dec 2015 |
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