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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) 77 Page - SMSC Corporation |
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USB97C102 датащи(HTML) 77 Page - SMSC Corporation |
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77 / 80 page  SMSC DS – USB97C102 Page 77 Rev. 03/23/2000 FIGURE 20 - 8051 FLASH PROGRAM FETCH TIMING Table 127 - 8051 Flash Program Fetch Timing Parameters PARAMETER MIN TYP MAX OSCILLATOR EQUATION UNITS t1 FA Valid to nRD asserted 64 2t-20 ns t2 nRD active pulse width 105 3t-20 ns t3 nRD deasserted to FA Invalid 32 t-10 ns t4 nRD asserted to Data Valid 0 ns t7 FD data Hold from nRD deasserted 0 ns t8 nRD deasserted to FD data tri- state 32 t-10 ns t9 FALE active pulse width 53 2t-30 ns t10 FA address Valid to FALE deasserted 21.66 t-20 ns t11 FALE deasserted to nRD asserted 21.66 t-20 ns Note: Min and Max delays shown for an 8051 clock of 24MHz, to calculate timing delays for other clock frequencies use the Oscillator Equations, where T=1/Fclk. t3 t1 t2 t4 t7 DATA VALID FALE FA] nRD FD t8 t9 t10 t10 t11 |
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