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ADSP-2185NKSTZ-320 Datasheet(PDF) 31 Page - Analog Devices |
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ADSP-2185NKSTZ-320 Datasheet(HTML) 31 Page - Analog Devices |
31 / 48 page ADSP-218xN Rev. A | Page 31 of 48 | August 2006 Memory Read Table 18. Memory Read Parameter Min Max Unit Timing Requirements: tRDD RD Low to Data Valid1 0.5tCK – 5 + w ns tAA A13 – 0, xMS to Data Valid2 0.75tCK – 6 + w ns tRDH Data Hold from RD High 0 ns Switching Characteristics: tRP RD Pulse Width 0.5tCK – 3 + w ns tCRD CLKOUT High to RD Low 0.25tCK – 2 0.25tCK + 4 ns tASR A13 – 0, xMS Setup before RD Low 0.25tCK – 3 ns tRDA A13 – 0, xMS Hold after RD Deasserted 0.25tCK – 3 ns tRWR RD High to RD or WR Low 0.5tCK – 3 ns 1 w = wait states 3 t CK. 2 xMS = PMS, DMS, CMS, IOMS, BMS. Figure 29. Memory Read CLKOUT ADDRESS LINES1 DATA LINES2 tRDA tRWR tRP tASR tCRD tRDD tAA tRDH DMS, PMS, BMS, IOMS, CMS RD WR 1ADDRESS LINES FOR ACCESSES ARE: 2DATA LINES FOR ACCESSES ARE: BDMA: A13–0 (14 LSBs), D23–16 (8 MSBs) BDMA: D15–8 I/O SPACE: A10–0 I/O SPACE: D23–8 EXTERNAL PM AND DM: A13–0 EXTERNAL DM: D23–8 EXTERNAL PM: D23–0 |
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