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GS8662D20BD-400I Datasheet(PDF) 9 Page - GSI Technology |
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GS8662D20BD-400I Datasheet(HTML) 9 Page - GSI Technology |
9 / 33 page Separate I/O SigmaQuad II+ B4 SRAM Truth Table Previous Operation A R W Current Operation D D D D Q Q Q Q K (tn-1) K (tn) K (tn) K (tn) K (tn) K (tn+1) K (tn+1½) K (tn+2) K (tn+2½) K (tn+2½) K (tn+3) K (tn+3½) K (tn+4) Deselect X 1 1 Deselect X X — — Hi-Z Hi-Z — — Write X 1 X Deselect D2 D3 — — Hi-Z Hi-Z — — Read X X 1 Deselect X X — — Q2 Q3 — — Deselect V 1 0 Write D0 D1 D2 D3 Hi-Z Hi-Z — — Deselect V 0 X Read X X — — Q0 Q1 Q2 Q3 Read V X 0 Write D0 D1 D2 D3 Q2 Q3 — — Write V 0 X Read D2 D3 — — Q0 Q1 Q2 Q3 Notes: 1. “1” = input “high”; “0” = input “low”; “V” = input “valid”; “X” = input “don’t care” 2. “—” indicates that the input requirement or output state is determined by the next operation. 3. Q0, Q1, Q2, and Q3 indicate the first, second, third, and fourth pieces of output data transferred during Read operations. 4. D0, D1, D2, and D3 indicate the first, second, third, and fourth pieces of input data transferred during Write operations. 5. Users should not clock in metastable addresses. Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. Rev: 1.02c 8/2017 9/33 © 2011, GSI Technology GS8662D20/38BD-550/500/450/400/350 GS8662D06/11BD-500/450/400/350 |
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