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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) 79 Page - SMSC Corporation |
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USB97C102 датащи(HTML) 79 Page - SMSC Corporation |
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79 / 80 page  SMSC DS – USB97C102 Page 79 Rev. 03/23/2000 FIGURE 22 - 8051 FLASH MEMORY WRITE TIMING Table 129 - 8051 Flash Memory Read Timing Parameters PARAMETER MIN TYP MAX OSCILLATOR EQUATION UNITS t1 SA[19:0] Valid to nMEMWR asserted 107 4t-60 ns t2 nMEMWR active pulse width 150 6t-100 ns t3 nMEMWR deasserted to SA[19:0] Invalid 21.66 t-20 ns t4 nMEMWR asserted to Data Valid 32 t-10 ns t7 SD[7:0] data Hold from nMEMWR deasserted 5 ns t8 nMEMWR deasserted to SD[7:0] data tri-state 64 2t ns t11 FALE deasserted to nMEMWR asserted 85 165 3t +/- 40 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. FIGURE 23 - RESET_IN TIMING Table 130 - RESET_IN Timing Parameters PARAMETER MIN TYP MAX UNITS t2 RESET_IN active pulse width 50 ns t3 t1 t2 t4 t7 DATA VALID FALE SA[19:0] nMEMWR SD[7:0] t8 t10 t11 t2 Reset_In |
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