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SPEAR600 Datenblatt(PDF) 60 Page - STMicroelectronics |
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SPEAR600 Datenblatt(HTML) 60 Page - STMicroelectronics |
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60 / 97 page ![]() Timing characteristics SPEAr600 60/97 Doc ID 16259 Rev 3 6 Timing characteristics 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 4. DDR2 read cycle waveforms Figure 5. DDR2 read cycle path t4 t5 t5 t4 t4 DQS DQ t1 t2 Q Q SET CLR D t3 DLL DQS DQ Table 31. DDR2 read cycle path timings without pad delay t3MAX (t1 + t2)MIN t3MIN (t1 + t2)MAX Rising best 133 ps 212 ps 125 ps 244 ps Falling best 134 ps 205 ps 127 ps 239 ps Rising worst 336 ps 611 ps 311 ps 646 ps Falling worst 348 ps 550 ps 324 ps 590 ps Table 32. DDR2 read cycle timings without pad delay Period (T) Frequency t4MAX t5MAX 3 ns 333 MHz 814 ps 343 ps 3.75 ns 266 MHz 996 ps 532 ps |
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