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ADSP-BF607 Datasheet(PDF) 68 Page - Analog Devices |
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ADSP-BF607 Datasheet(HTML) 68 Page - Analog Devices |
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68 / 112 page ![]() Rev. 0 | Page 68 of 112 | June 2013 ADSP-BF606/ADSP-BF607/ADSP-BF608/ADSP-BF609 DDR2 SDRAM Read Cycle Timing Table 37. DDR2 SDRAM Read Cycle Timing, VDD_DMC Nominal 1.8 V 250 MHz 1 1 In order to ensure proper operation of the DDR2, all the DDR2 guidelines have to be strictly followed. Parameter Min Max Unit Timing Requirements tDV Data Valid Window 1 ns tDQSQ DMC0_DQS-DMC0_DQ Skew for DMC0_DQS and Associated DMC0_ DQ Signals 0.35 ns tQH DMC0_DQ, DMC0_DQS Output Hold Time From DMC0_DQS 1.6 ns tRPRE Read Preamble 0.9 tCK tRPST Read Postamble 0.4 tCK Figure 20. DDR2 SDRAM Controller Input AC Timing DDR2_CLKx DDR2_DQSn tAC tRPRE tDQSQ tDQSQ tQH tRPST DDR2_DATA DDR2_CLKx DDR2_DQSn tDQSCK tCK tCH tCL tAS tAH DDR2_ADDR DDR2_CTL tQH |
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