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GS81302TT06 Scheda tecnica(PDF) 9 Page - GSI Technology |
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GS81302TT06 Scheda tecnica(HTML) 9 Page - GSI Technology |
9 / 29 page Common I/O SigmaDDR-II+ Burst of 2 SRAM Truth Table Kn LD R/W DQ Operation A + 0 A + 1 ↑ 1 X Hi-Z / * Hi-Z / * Deselect ↑ 0 0 D@Kn+1 D@Kn+1 Write ↑ 0 1 Q@Kn+2 Q@Kn+3 Read Notes: 1. “1” = input “high”; “0” = input “low”; “V” = input “valid”; “X” = input “don’t care”. 2. D1 and D2 indicate the first and second pieces of Write Data transferred during Write operations. 3. Q1 and Q2 indicate the first and second pieces of Read Data transferred during Read operations. 4. When On-Die Termination is disabled (ODT = 0), DQ drivers are disabled (i.e., DQ pins are tri-stated) for one cycle in response to NOP and Write commands, 2.5 cycles after the command is sampled. 5. When On-Die Termination is enabled (ODT = 1), DQ drivers are disabled for one cycle in response to NOP and Write commands, 2.5 cycles after the command is sampled. The state of the DQ pins during that time (denoted by “*” in the table above) is determined by the state of the DQ input termination. See the Input Termination Impedance Control section for more information. Burst of 2 Byte Write Clock Truth Table BW BW Current Operation D D K ↑ (tn + 1) K ↑ (tn + 1½) K ↑ (tn) K ↑ (tn + 1) K ↑ (tn + 1½) T T Write Dx stored if BWn = 0 in both data transfers D1 D2 T F Write Dx stored if BWn = 0 in 1st data transfer only D1 X F T Write Dx stored if BWn = 0 in 2nd data transfer only X D2 F F Write Abort No Dx stored in either data transfer X X Notes: 1. “1” = input “high”; “0” = input “low”; “X” = input “don’t care”; “T” = input “true”; “F” = input “false”. 2. If one or more BWn = 0, then BW = “T”, else BW = “F”. Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. Rev: 1.00b 11/2011 9/29 © 2011, GSI Technology GS81302TT06/11/20/38E-500/450/400/350 |
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