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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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SPEAR300 Scheda tecnica(PDF) 57 Page - STMicroelectronics |
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SPEAR300 Scheda tecnica(HTML) 57 Page - STMicroelectronics |
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57 / 83 page  SPEAr300 Timing requirements Doc ID 16324 Rev 2 57/83 6 Timing requirements 6.1 DDR2 timing characteristics The characterization timing is done considering an output load of 10 pF on all the DDR pads. The operating conditions are in worst case V = 0.90 V TA = 125° C and in best case V=1.10 V TA = 40° C. 6.1.1 DDR2 read cycle timings Figure 7. DDR2 Read cycle waveforms Figure 8. DDR2 Read cycle path Table 26. DDR2 Read cycle timings Frequency t4 max t5 max 333 MHz 1.24 ns -495 ps 266 MHz 1.43 ns -306 ps 200 MHz 1.74 ns 4 ps t4 t5 t5 t4 t4 DQS DQ t3 t1 t2 DLL D Q Q CLR SET DQ DQS |
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