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PPC440GX-3RF800C Datasheet(PDF) 85 Page - Applied Micro Circuits Corporation |
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PPC440GX-3RF800C Datasheet(HTML) 85 Page - Applied Micro Circuits Corporation |
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85 / 93 page ![]() 440GX – Power PC 440GX Embedded Processor AMCC 85 Revision 1.15 – August 30, 2007 Data Sheet In the following examples, the data strobes (DQS) and the data are shown to be coincident. There is actually a slight skew as specified by the SDRAM specifications, and there can be additional skew due to loading and signal routing. It is recommended that the signal length for all of the eight DQS signals be matched. I/O Timing—DDR SDRAM TSIN and TDIN Notes: 1. TSIN = Delay from DQS at package pin to C on Stage 1 FF. 2. TDIN = Delay from data at package pin to D on Stage 1 FF. 3. The time values for TSIN include 1/4 of a cycle at the indicated clock speed. Clock Speed (MHz) Signal Name TSIN (ns) minimum TSIN (ns) maximum Signal Name TDIN (ns) minimum TDIN (ns) maximum 166 DQS0 2.132 2.884 MemData00:07 0.779 1.502 166 DQS1 2.132 2.867 MemData08:15 0.789 1.521 166 DQS2 2.127 2.873 MemData16:23 0.779 1.530 166 DQS3 2.116 2.851 MemData24:31 0.791 1.553 166 DQS4 2.100 2.845 MemData32:39 0.766 1.501 166 DQS5 2.103 2.844 MemData40:47 0.754 1.525 166 DQS6 2.144 2.902 MemData48:55 0.747 1.513 166 DQS7 2.110 2.864 MemData56:63 0.770 1.521 166 DQS8 2.122 2.860 ECC0:7 0.759 1.464 200 DQS0 1.942 2.365 MemData00:07 0.638 1.165 200 DQS1 1.920 2.314 MemData08:15 0.631 1.149 200 DQS2 1.938 2.361 MemData16:23 0.634 1.151 200 DQS3 1.945 2.370 MemData24:31 0.624 1.169 200 DQS4 1.932 2.332 MemData32:39 0.630 1.151 200 DQS5 1.936 2.348 MemData40:47 0.619 1.133 200 DQS6 1.938 2.356 MemData48:55 0.635 1.149 200 DQS7 1.943 2.360 MemData56:63 0.642 1.151 200 DQS8 1.952 2.381 ECC0:7 0.641 1.141 |
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