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AD9854AST 数据表(PDF) 35 Page - Analog Devices |
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AD9854AST 数据表(HTML) 35 Page - Analog Devices |
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35 / 52 page ![]() AD9854 Rev. E | Page 35 of 52 A<5:0> D<7:0> A1 D1 A2 D2 A3 D3 tRDHOZ tRDLOV tAHD tADV SPECIFICATION VALUE DESCRIPTION tADV tAHD tRDLOV tRDHOZ 15ns 5ns 15ns 10ns ADDRESS TO DATA VALID TIME (MAXIMUM) ADDRESS HOLD TIME TO RD SIGNAL INACTIVE (MINIMUM) RD LOW TO OUTPUT VALID (MAXIMUM) RD HIGH TO DATA THREE-STATE (MAXIMUM) RD Figure 52. Parallel Port Read Timing Diagram D<7:0> D1 D2 D3 SPECIFICATION VALUE DESCRIPTION tASU tDSU tADH tDHD 8.0ns 3.0ns ADDRESS SETUP TIME TO WR SIGNAL ACTIVE DATA SETUP TIME TO WR SIGNAL ACTIVE 0ns 0ns ADDRESS HOLD TIME TO WR SIGNAL INACTIVE DATA HOLD TIME TO WR SIGNAL INACTIVE tWRLOW tWRHIGH tWR 2.5ns WR SIGNAL MINIMUM LOW TIME 7ns 10.5ns WR SIGNAL MINIMUM HIGH TIME MINIMUM WRITE TIME A<5:0> A1 A2 A3 tASU tAHD tWRHIGH tWRLOW tDHD tDSU tWR WR Figure 53. Parallel Port Write Timing Diagram |
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