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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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USB97C102 датащи(PDF) 74 Page - SMSC Corporation |
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USB97C102 датащи(HTML) 74 Page - SMSC Corporation |
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74 / 80 page  SMSC DS – USB97C102 Page 74 Rev. 03/23/2000 FIGURE 16 – 8051 IO READ CYCLE Table 123 – 8051 IO Read Timing Parameters NAME DESCRIPTION MIN MAX EQUIATION UNITS t1 SA[x] and AEN Valid to nIOR Asserted 107 4t-60 ns t2 nIOR Asserted to nIOR Deasserted 150 6t-100 ns t3 nIOR Asserted to SA[x] Invalid 32 t-10 ns t4 nIOR Asserted to Data Valid 0 ns t5 Data Hold/Float from nIOR Deasserted 0 ns t6 nIOR Asserted after nIOR Deasserted 32 t-10 ns t7 nIOR Asserted after nIOW Deasserted 32 t-10 ns t8 nIOR Asserted to AEN Valid 10 ns t9 Data Valid to nIOR Deassereted 30 ns t10 nIOR Deasserted to SD[x] tri-state 32 t-10 ns Note: Min and Max delays shown for 8051 clk of 24 MHz, to calculate typical timing delays for other clock frequencies use Oscillator Equations, where t=1/fCLK. FIGURE 17 - INPUT CLOCK TIMING Table 124 - Input Clock Timing Parameters NAME DESCRIPTION MIN TYP MAX UNITS t1 Clock Cycle Time for 24 MHz 41.67 ns t2 Clock High Time/Low Time for 14.318 MHz 25/16.7 16.7/25 ns tr, tf Clock Rise Time/Fall Time (not shown) 5 ns t2 t1 t2 CLOCKI t3 t1 t2 t4 t5 DATA VALID AEN SA[x] nIOR SD[x] nIOW/nIOR t6 t7 t8 t9 t10 |
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