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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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COM90C66 датащи(PDF) 73 Page - SMSC Corporation |
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COM90C66 датащи(HTML) 73 Page - SMSC Corporation |
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73 / 76 page  73 FIGURE 17 - READ I/O CYCLE Parameter min typ max units t1 t2 t3 t4 t5 t6 t7 t8 t9 Address, nSBHE Set Up to BALE Low * Address, nSBHE Hold after BALE Low * Address, nSBHE, AEN Set Up to nIOR Low nIOR Low to Valid Data nIOR Low to nTOPH, nTOPL Low A2-A15 Valid, AEN Low to nIOCS16 Low nIOR High to nTOPH, nTOPL High nIOR High to Data High Impedance nIOR High to BALE High (Next Address) 20 20 25 0 0 0 0 30 nS nS nS nS nS nS nS nS nS nS nS nS 80 30 25 15 20 For latched addresses, t1 and t2 do not apply. Please refer to Figure 21 for Latched Address Mode. 130 nS minimum inactive time on consecutive reads from Data Register of the COM90C66. Modified Version of Page 52 for Rev. D COM90C66 Only. * ** VALID AEN A0-A15, BALE nIOR D0-D7 nTOPL t1 t2 t3 t4 t5 t7 t8 t9 nSBHE D0-D15 nTOPH, nIOCS16 t6 or VALID DATA ** t10 t10 AEN Hold after nIOR High 10 nS |
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