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IMX28AEC Datasheet(PDF) 30 Page - Freescale Semiconductor, Inc |
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IMX28AEC Datasheet(HTML) 30 Page - Freescale Semiconductor, Inc |
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30 / 72 page  i.MX28 Applications Processors Data Sheet for Automotive Products, Rev. 1 30 Freescale Semiconductor 3.5.3 EMI AC Timing This section includes descriptions of the electrical specifications of EMI module which interfaces external DDR2 and Mobile-DDR1 (LP-DDR1) memory devices. 3.5.3.1 EMI Command & Address AC Timing Figure 5 and Table 35 specify the timing related to the address and command pins that interfaces DDR2 and Mobile-DDR1 memory devices. Figure 5. EMI Command/Address AC Timing Table 35. EMI Command/Address AC Timing ID Description Symbol Min. Max. Unit DDR1 CK cycle time tCK 4.86 — ns DDR2 CK high level width tCH 0.5 tCK –0.5 0.5 tCK + 0.5 ns EMI_CLK EMI_CLKN EMI_CE0N EMI_RASN EMI_CASN EMI_WEN bank row bank column EMI_ADDR DDR1 DDR2 DDR3 DDR4 DDR5 DDR4 DDR5 DDR4 DDR5 |
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