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Z84C9012VSC датащи(PDF) 20 Page - Zilog, Inc. |
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Z84C9012VSC датащи(HTML) 20 Page - Zilog, Inc. |
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20 / 31 page ![]() Z84C90 KIO Serial/Parallel Counter Timer PS011802-0902 15 AC Characteristics Table 5. AC Characteristics of the Z84C90 8MHz 10MHz1 12MHz No. Symbol Parameter Min Max Min Max Min Max U/M Bus Interface Timing 1 TcC Clock Cycle Time 125 DC 100 DC 80 DC ns 2 TwCh Clock Pulse Width (High) 55 DC 42 DC 32 DC ns 3 TwCl Clock Pulse Width (Low) 55 DC 42 DC 32 DC ns 4 TfC Clock Fall Time 10 10 10 ns 5 TrC Clock Rise Time 10 10 10 ns 6TsA(Rlf) Address, CS Setup to RD, IORQ Fall 50 40 30 ns 7TsRl(Cr) RD, IORQ to Clock Rise Setup 50 50 40 ns 8 Th Hold Time for Specified Setup 15 15 15 ns 9 TdCr(DO) CLOCK Rise to Data Out Delay 100 80 65 ns 10 TdRlr(DOz) RD, IORQ Rise to Data Out Float Delay 75 60 55 ns 11 ThRDr(D) M1,RD,IORQ Rise to Data Float 15 15 15 ns 12 TsD(Cr) Data in to Clock Rise Setup 30 25 22 ns 13 TdIOI(DO) IORQ Fall to Data Out Delay (INTACK Cycle)2 95 95 95 ns 14 ThIOr(D) IORQ Rise to Data Float (INTACK) 15 15 15 ns 15 THIOr(A) IORQ Rise to Address Hold 15 15 15 ns 16 TsM1f(Cr) M1 Fall to Clock Rise Setup 40 40 40 ns 17 TsM1r(Cf) M1 Rise to Clock Fall Setup (M1 Cycle) -15 -15 15 ns 18 TdM1f(IEOf) M1 Fall to IEO Fall Delay (Interrupt Immediately preceding M1 Fall)3 •• • ns 19 TsIEI(IOf) IEI to IORQ Fall Setup3 •• • ns 20 TdIEIf(IEOf) IEI Fall to IEO Fall Delay3 160 150 125 ns 21 TdIEIf(IEOr) IEI Rise to IEO Rise Delay (after ED Decode)3 160 150 125 ns |
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