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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MB91F528 датащи(PDF) 217 Page - SPANSION |
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MB91F528 датащи(HTML) 217 Page - SPANSION |
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217 / 241 page  D a t a S h e et 214 MB91F528_DS705-00016-1v0-E, March 28, 2014 CONFIDENTIAL (11) External bus I/F (asynchronous mode) timing (TA: -40°C to +105°C,VCC=AVCC=5.0V±10%/VCC= AVCC=3.3V±0.3V,VSS=AVSS=0.0V) (external load capacitance 50pF) Parameter Symbol Pin name Value Unit Remarks Min Max Cycle time tCYC SYSCLK 25 - ns VCC=5.0V±10% *1 31.25 VCC=3.3V±0.3V Address setup → RDX↑time tASRH RDX, A00 to A21 2 ×tCYC - 12 2 ×tCYC + 12 ns RWT=1, set RWT to 1 or more. *2 RDX↑→ Address hold tRHAH tCYC - 12 tCYC + 12 ns Set RDCS 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 Address setup→ WRnX↑time tASWH WR0X to WR1X, A00 to A21 tCYC - 12 tCYC + 12 ns WWT=0 *2 WRnX↑→ Address hold tWHAH tCYC - 12 tCYC + 12 ns Set WRCS to 1 or more. Data setup→ WRnX↑time tDSWH WR0X to WR1X, D16 to D31 tCYC - 16 tCYC + 16 ns WWT=0 *2 WRnX↑→ Data hold tWHDH tCYC - 16 tCYC + 16 ns Set WRCS to 1 or more. Address setup → ASX↑time tMASASH ASX, D16 to D31 tCYC-16 tCYC+ 16 ns ASCY=0 ASX↑→Address hold tMASHAH tCYC-16 tCYC + 16 ns In multiplex mode, set as follows: Set CSWR and CSRD to 2 or more. ASCY must satisfy the following conditions because of setting ADCY > ASCY and protocol violation prevention. ADCY +1 ≤ ACS + CSRD ADCY +1 ≤ ACS + CSWR ASCY + 1 ≤ ACS + CSRD ASCY + 1 ≤ ACS + CSWR See Hardware Manual for details. *1: Please use it with external load capacity 12pF or less for VCCE=3.3V±0.3V (40MHz operation). *2: 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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