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M58WR064EB データシート(PDF) 44 Page - STMicroelectronics |
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M58WR064EB データシート(HTML) 44 Page - STMicroelectronics |
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44 / 82 page  M58WR064ET, M58WR064EB 44/82 Figure 14. Clock input AC Waveform Table 21. Synchronous Read AC Characteristics Note: 1. Sampled only, not 100% tested. 2. For other timings please refer to Table 20, Asynchronous Read AC Characteristics. Symbol Alt Parameter VDDQ = 1.65V-2.2V VDDQ = 2.2V-3.3V Unit 70 80 100 70 80 100 tAVKH tAVCLKH Address Valid to Clock High Min 7 7 7 9 9 10 ns tELKH tELCLKH Chip Enable Low to Clock High Min 7 7 7 9 9 10 ns tELTV Chip Enable Low to Wait Valid Max 14 14 18 20 22 22 ns tEHEL Chip Enable Pulse Width (subsequent synchronous reads) Min 14 14 14 20 20 20 ns tEHTZ Chip Enable High to Wait Hi-Z Max 14 14 20 25 25 25 ns tKHAX tCLKHAX Clock High to Address Transition Min 9 9 10 10 10 10 ns tKHQV tKHTV tCLKHQV Clock High to Output Valid Clock High to WAIT Valid Max 14 14 18 20 22 22 ns tKHQX tKHTX tCLKHQX Clock High to Output Transition Clock High to WAIT Transition Min 44 45 55 ns tLLKH tADVLCLK H Latch Enable Low to Clock High Min 7 7 7 10 10 10 ns tKHKH tCLK Clock Period (f=33MHz) Min -- - 30 30 ns Clock Period (f=40MHz) 25 25 Clock Period (f=54MHz) 18.5 18.5 - - - ns tKHKL tKLKH Clock High to Clock Low Clock Low to Clock High Min 4.5 4.5 5 9.5 9.5 9.5 ns tf tr Clock Fall or Rise Time Max 3 3 3 3 5 5 ns AI06981 tKHKH tf tr tKHKL tKLKH |
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