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ADSP2185 数据表(PDF) 21 Page - Analog Devices |
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ADSP2185 数据表(HTML) 21 Page - Analog Devices |
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21 / 32 page ![]() ADSP-2185 REV. 0 –21– Parameter Min Max Unit Memory Write Switching Characteristics: tDW Data Setup before WR High 0.5 tCK – 7+ w ns tDH Data Hold after WR High 0.25 tCK – 2 ns tWP WR Pulse Width 0.5 tCK – 5 + w ns tWDE WR Low to Data Enabled 0 ns tASW A0–A13, xMS Setup before WR Low 0.25 tCK – 6 ns tDDR Data Disable before WR or RD Low 0.25 tCK – 7 ns tCWR CLKOUT High to WR Low 0.25 tCK – 5 0.25 tCK + 7 ns tAW A0–A13, xMS, Setup before WR Deasserted 0.75 tCK – 9 + w ns tWRA A0–A13, xMS Hold after WR Deasserted 0.25 tCK – 3 ns tWWR WR High to RD or WR Low 0.5 tCK – 5 ns w = wait states × t CK xMS = PMS, DMS, CMS, IOMS, BMS CLKOUT A0–A13 D tWP tAW tCWR tDH tWDE tDW tASW tWWR tWRA tDDR DMS, PMS, BMS, CMS, IOMS RD WR Figure 18. Memory Write |
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