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PC87311AVF Datasheet(PDF) 65 Page - National Semiconductor (TI) |
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PC87311AVF Datasheet(HTML) 65 Page - National Semiconductor (TI) |
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65 / 78 page  90 Device Description (Continued) 923 Microprocessor Interface Timing Symbol Parameter Min Max Units tAR Valid Address to Read Active 18 ns tAW Valid Address to Write Active 18 ns tDH Data Hold 0 ns tDS Data Setup 18 ns tHZ Read to Floating Data Bus 13 25 ns tPS Port Setup 10 ns tRA Address Hold from Inactive Read 0 ns tRCU Read Cycle Update 45 ns tRD Read Strobe Width 60 ns tRDH Read Data Hold 10 ns tRI Read Strobe to Clear IRQ6 55 ns tRVD Active Read to Valid Data 55 ns tWA Address Hold from Inactive Write 0 ns tWCU Write Cycle Update 45 ns tWI Write Strobe to Clear IRQ6 55 ns tWO Write Data to Port Update 40 ns tWR Write Strobe Width 60 ns RC Read Cycle e tAR a tRD a tRC 123 ns WC Write Cycle e tAW a tWR a tWC 123 ns TLF11362 – 18 FIGURE 9-2 Microprocessor Read Timing 65 |
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