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ST75C520PQFP Datasheet(PDF) 8 Page - STMicroelectronics |
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ST75C520PQFP Datasheet(HTML) 8 Page - STMicroelectronics |
8 / 45 page III.3 - AC Electrical Characteristics III.3.1 - Dual Port RAM Host Timing Number Description Min. Typ. Max. Unit 1 Address and Control Set-up Time 5 ns 2 SDTACK Acknowledge 20 ns 3 Data Set-up Time 10 ns 4 Address and Control Hold Time 0 ns 5 Data Hold Time 5 ns 6 SDTACK Hold Time 0 ns 7 Write Enable Low State 45 ns 8 Access Inhibition High State (see Note) 70 ns 9 Read Enable Low State 45 ns 10 Read Data Access 35 ns 11 SINTR Clear Delay 50 ns 12 Data Valid to Tristate 15 ns Note : A minimum delay of 70ns is required only from the rizing edge of NWRITE to the falling edge of the next selected NREAD or NWRITE. 19 4 NSCS SA[0..6] SR/NW SD[0..7] WRITE-CYCLE TIMING Valid Address READ-CYCLE TIMING Valid Address Valid Data OUT NSDS NSDTACK NSINTR SR/NW (= NWRITE) NSDS (= NREAD) 17 4 8 3 5 10 5 12 26 26 11 Valid Data IN ST75C520 8/45 |
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