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GS8672D38BE-500I 데이터시트(PDF) 9 Page - GSI Technology |
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GS8672D38BE-500I 데이터시트(HTML) 9 Page - GSI Technology |
9 / 30 page Separate I/O SigmaQuad II+ B4 ECCRAM 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/0 Hi-Z/0 — — Write X 1 X Deselect D2 D3 — — Hi-Z/0 Hi-Z/0 — — Read X X 1 Deselect X X — — Q2 Q3 — — Deselect V 1 0 Write D0 D1 D2 D3 Hi-Z/0 Hi-Z/0 — — 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. 6. When On-Die Termination is disabled (ODT = 0), Q drivers are disabled (i.e., Q pins are tri-stated) for one cycle in response to NOP and Write commands, 2.5 cycles after the command is sampled, except when preceded by a Read command. 7. When On-Die Termination is enabled (ODT = 1), Q drivers are enabled Low (i.e., Q pins are driven Low) for one cycle in response to NOP and Write commands, 2.5 cycles after the command is sampled, except when preceded by a Read command. This is done so that the ASIC/ Controller can enable On-Die Termination on its data inputs without having to cope with the termination pulling tri-stated data inputs to VDDQ/ 2 (i.e., to the switch point of the data input receivers). GS8672D20/38BE-633/550/500/450/400 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. Rev: 1.03c 8/2017 9/30 © 2011, GSI Technology |
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