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DS8007 Datasheet(PDF) 7 Page - Maxim Integrated Products |
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DS8007 Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 41 page Multiprotocol Dual Smart Card Interface _______________________________________________________________________________________ 7 AC ELECTRICAL SPECIFICATIONS—TIMING PARAMETERS FOR MULTIPLEXED PARALLEL BUS (VDD = 3.3V, VDDA = 3.3V, TA = +25°C, unless otherwise noted.) (Figure 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS XTAL1 Cycle Time tCY(XTAL1) 50 ns ALE Pulse Width tW(ALE) 20 ns Address Valid to ALE Low tAVLL 10 ns ALE Low to RD or WR Low t(AL-RWL) 10 ns Register URR 2 x tCY(XTAL1) RD Pulse Width tW(RD) Other registers 10 ns RD Low to Data Read Valid t(RL-DV) 50 ns WR/RD High to ALE High t(RWH-AH) 10 ns WR Pulse Width tW(WR) 10 ns Data Write Valid to WR Low t(DV-WL) 10 ns ALE CS D7–D0 RD WR ADDRESS ADDRESS DATA (READ) DATA (WRITE) tW(ALE) tAVLL t(AL-RWL) tW(RD) t(RL-DV) t(RWH-AH) t(DV-WL) t(RWH-AH) tW(WR) Figure 1. Multiplexed Parallel Bus Timing |
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