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WED3DL328V7BI Datasheet(PDF) 9 Page - White Electronic Designs Corporation |
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WED3DL328V7BI Datasheet(HTML) 9 Page - White Electronic Designs Corporation |
9 / 27 page 9 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs WED3DL328V June, 2002 Rev. 1 White Electronic Designs Corp. reserves the right to change products or specifications without notice. CURRENT STATE TRUTH TABLE Current State Command Action Notes CE# RAS# CAS# WE# BA0-1 A11, A10/AP-A0 Description Idle L L L L OP Code Mode Register Set Set the Mode Register 2 L L L H X X Auto orSelf Refresh Start Auto orSelf Refresh 2,3 L L H L X X Precharge No Operation L L H H BA Row Address Bank Activate Activate the specified bank and row L H L L BA Column Write w/o Precharge ILLEGAL 4 L H L H BA Column Read w/o Precharge ILLEGAL 2 L H H L X X Burst Termination No Operation 2 L H H H X X No Operation No Operation H X X X X X Device Deselect No Operation or Power Down 5 Row Active L L L L OP Code Mode Register Set ILLEGAL L L L H X X Auto orSelf Refresh ILLEGAL L L H L X X Precharge Precharge 6 L L H H BA Row Address Bank Activate ILLEGAL 2 L H L L BA Column Write Start Write; Determine if Auto Precharge 7,8 L H L H BA Column Read Start Read; Determine if Auto Precharge 7,8 L H H L X X Burst Termination No Operation L H H H X X No Operation No Operation H X X X X X Device Deselect No Operation Read L L L L OP Code Mode Register Set ILLEGAL L L L H X X Auto orSelf Refresh ILLEGAL L L H L X X Precharge Terminate Burst; Start the Precharge L L H H BA Row Address Bank Activate ILLEGAL 4 L H L L BA Column Write Terminate Burst; Start the Write cycle 8,9 L H L H BA Column Read Terminate Burst; Start a new Read cycle 8,9 L H H L X X Burst Termination Terminate the Burst L H H H X X No Operation Continue the Burst H X X X X X Device Deselect Continue the Burst Write L L L L OP Code Mode Register Set ILLEGAL L L L H X X Auto orSelf Refresh ILLEGAL L L H L X X Precharge Terminate Burst; Start the Precharge L L H H BA Row Address Bank Activate ILLEGAL 4 L H L L BA Column Write Terminate Burst; Start a new Write cycle 8,9 L H L H BA Column Read Terminate Burst; Start the Read cycle 8,9 L H H L X X Burst Termination Terminate the Burst L H H H X X No Operation Continue the Burst H X X X X X Device Deselect Continue the Burst Read with Auto Precharge L L L L OP Code Mode Register Set ILLEGAL L L L H X X Auto orSelf Refresh ILLEGAL L L H L X X Precharge ILLEGAL 4 L L H H BA Row Address Bank Activate ILLEGAL 4 L H L L BA Column Write ILLEGAL L H L H BA Column Read ILLEGAL L H H L X X Burst Termination ILLEGAL L H H H X X No Operation Continue the Burst H X X X X X Device Deselect Continue the Burst |
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