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AS4C256M16D3LA-12BIN Datasheet(PDF) 8 Page - Alliance Semiconductor Corporation |
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AS4C256M16D3LA-12BIN Datasheet(HTML) 8 Page - Alliance Semiconductor Corporation |
8 / 83 page Operation Mode Truth Table Table 4. Truth Table (Note (1), (2)) Command State CKEn-1 (3) CKEn DM BA0-2 A10/AP A0-9, 11, 13-14 A12/BC# CS# RAS# CAS# WE# BankActivate Idle(4) H H X V Row address L L H H Single Bank Precharge Any H H X V L V V L L H L All Banks Precharge Any H H X V H V V L L H L Write (Fixed BL8 or BC4) Active(4) H H X V L V V L H L L Write (BC4, on the fly) Active(4) H H X V L V L L H L L Write (BL8, on the fly) Active(4) H H X V L V H L H L L Write with Autoprecharge (Fixed BL8 or BC4) Active(4) H H X V H V V L H L L Write with Autoprecharge (BC4, on the fly) Active(4) H H X V H V L L H L L Write with Autoprecharge (BL8, on the fly) Active(4) H H X V H V H L H L L Read (Fixed BL8 or BC4) Active(4) H H X V L V V L H L H Read (BC4, on the fly) Active(4) H H X V L V L L H L H Read (BL8, on the fly) Active(4) H H X V L V H L H L H Read with Autoprecharge (Fixed BL8 or BC4) Active(4) H H X V H V V L H L H Read with Autoprecharge (BC4, on the fly) Active(4) H H X V H V L L H L H Read with Autoprecharge (BL8, on the fly) Active(4) H H X V H V H L H L H (Extended) Mode Register Set Idle H H X V OP code L L L L No-Operation Any H H X V V V V L H H H Device Deselect Any H H X X X X X H X X X Refresh Idle H H X V V V V L L L H SelfRefresh Entry Idle H L X V V V V L L L H X X X X H X X X SelfRefresh Exit Idle L H X V V V V L H H H X X X X H X X X Power Down Mode Entry Idle H L X V V V V L H H H X X X X H X X X Power Down Mode Exit Any L H X V V V V L H H H Data Input Mask Disable Active H X L X X X X X X X X Data Input Mask Enable(5) Active H X H X X X X X X X X ZQ Calibration Long Idle H H X X H X X L H H L ZQ Calibration Short Idle H H X X L X X L H H L NOTE 1: V=Valid data, X=Don't Care, L=Low level, H=High level NOTE 2: CKEn signal is input level when commands are provided. NOTE 3: CKEn-1 signal is input level one clock cycle before the commands are provided. NOTE 4: These are states of bank designated by BA signal. NOTE 5: LDM and UDM can be enabled respectively. AS4C256M16D3LA-12BIN Confidential -8/83- Rev. 1.0 May 2016 |
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