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PC87309VLJ датащи(PDF) 172 Page - National Semiconductor (TI) |
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PC87309VLJ датащи(HTML) 172 Page - National Semiconductor (TI) |
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172 / 192 page ![]() Device Specifications 172 www.national.com 10.3.3 Microprocessor Interface Timing 1. Not tested. Guaranteed by design. Symbol Parameter Min Max Unit tAR Valid Address to Read Active 18 nsec tAW Valid Address to Write Active 18 nsec tDH Data Hold 0 nsec tDS Data Setup 18 nsec tHZ Read to Floating Data Bus1 13 25 nsec tPS Port Setup 10 nsec tRA Address Hold from Inactive Read 0 nsec tRCU Read Cycle Update1 45 nsec tRD Read Strobe Width 60 nsec tRDH Read Data Hold 10 nsec tRI Read Strobe to Clear IRQ6 55 nsec tRVD Active Read to Valid Data 55 nsec tWA Address Hold from Inactive Write 0 nsec tWCU Write Cycle Update1 45 nsec tWI Write Strobe to Clear IRQ6 55 nsec tWO Write Data to Port Update 60 nsec tWR Write Strobe Width 60 nsec tWRR RD low after WR high1 80 nsec RC Read Cycle = tAR + tRD + tRCU 1 123 nsec WC Write Cycle = tAW + tWR + tWC 1 123 nsec |
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