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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MB91F587LD датащи(PDF) 155 Page - SPANSION |
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MB91F587LD датащи(HTML) 155 Page - SPANSION |
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155 / 177 page  D at aS h ee t 152 MB91F587LA_DS705-00012-2v0-E, August 22, 2014 CONFIDENTIAL (11) External bus I/F (synchronous mode) timing (TA: Recommended operating conditions, VCC =AVCC=5.0V±10%, VSS=AVSS=0.0V) (External load capacitance 50pF) Parameter Symbol Pin name Value Unit Remarks Min Max Cycle time tCYC SYSCLK 25 - ns ASX delay time tCHASL, tCHASH SYSCLK, ASX 0.5 18.0 ns CS0X to CS3X delay time tCHCSL, tCHCSH SYSCLK, CS0X to CS3X 0.5 18.0 ns A00 to A21 delay time tCHAV, tCHAX SYSCLK, A00 to A21 0.5 18.0 ns RDX delay time tCHRL, tCHRH SYSCLK, RDX 0.5 18.0 ns RDX minimum pulse tRLRH RDX tCYC × 2 - 20 - ns RWT=1, set RWT to 1 or more. * Data setup → RDX ↑ time tDSRH RDX, D16 to D31 18 + tCYC - ns RWT=1, set RWT to 1 or more. * RDX ↑ → data hold tRHDH 0 - ns WRnX delay time tCHWL, tCHWH SYSCLK, WR0X, WR1X 0.5 18.0 ns WRnX minimum pulse width tWLWH WR0X, WR1X tCYC - 10 - ns WWT=0* SYSCLK ↑ → data output time tCHDV SYSCLK, D16 to D31 0.5 18.0 ns SYSCLK ↑ → data hold time tCHDX - 18 ns Set WRCS to 1 or more. SYSCLK ↑ → address output time tCHMAV SYSCLK, D16 to D31 0.5 18.0 ns SYSCLK ↑ → address hold time tCHMAX - 18 ns In multiplex mode, set as follows: • Set CSWR and CSRD to 2 or more. • Set to ADCY>ASCY. To prevent protocol violation, satisfy the following conditions: ADCY + 1 ≤ ACS + CSRD ADCY + 1 ≤ ACS + CSWR ASCY + 1 ≤ ACS + CSRD ASCY + 1 ≤ ACS + CSWR For details, see Hardware Manual. *: If the bus is expanded by automatic wait insertion or RDY input, add time (tCYC × the number of expanded cycles) to the rated value. |
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