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ADDR10 数据表(PDF) 29 Page - List of Unclassifed Manufacturers |
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ADDR10 数据表(HTML) 29 Page - List of Unclassifed Manufacturers |
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29 / 68 page ![]() AC c h aracteristics ww w.d i gi .c om 25 Figure 6: Internal pulldown characteristics AC characteristics AC electrical specifications define the timing relationship between signals for interfaces and modes within a given interface. AC electrical specifications The AC electrical specifications are based on the system configuration shown in Figure 7, with a 5pF allowance for PCB capacitance and a 0.25 ns allowance for PCB delay. The timing of the buffers, SDRAM, and the like must be added to complete timing analysis. In systems where SDRAM is not used, two devices are expected to replace the SDRAMs shown in Figure 7; that is, they are tied directly to the chip. System loading information is shown in Table 7: "System loading details" on page 26. |
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