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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DSP56857 датащи(PDF) 71 Page - Freescale Semiconductor, Inc |
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DSP56857 датащи(HTML) 71 Page - Freescale Semiconductor, Inc |
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71 / 662 page  Introduction Overview, Rev. 4 Freescale Semiconductor 2-3 2.1 Introduction This chapter details the input and output signals and functions of 568x packaging. Depending on the device, their pins allow a variety of functions and capabilities. Each is detailed in this chapter. In addition to the available peripherals, up to 47-general purpose pins are also available when not required for other purposes. The remaining signal pins are dedicated to one function. The input and output signals of these packages are organized into functional groups, shown in Table 2-1 and illustrated in Figure 2-1 through Figure 2-5. Each table row describes the package pins and the signal or signals present in Table 2-2 through Table 2-15. Interface signals have these general characteristics: • Pins listed here are pulled high with an on-chip resistor — TDI — TMS — TRST — DE • This pin is pulled low with an on-chip resistor: —TCK • These pins are pulled high by the device during hardware reset: — RD — WR • These pins have the internal pull-ups permanently disabled: — MODA — MODB — MODC • General Purpose I/O pins have programmable pull-up resistors |
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