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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCIMX503CVM8B датащи(PDF) 29 Page - Freescale Semiconductor, Inc |
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MCIMX503CVM8B датащи(HTML) 29 Page - Freescale Semiconductor, Inc |
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29 / 134 page  Electrical Characteristics i.MX50 Applications Processors for Consumer Products, Rev. 2 Freescale Semiconductor 29 4.2.1 Power-Up Sequence Figure 2 shows the power-up sequence. Figure 2. Power-Up Sequence NOTE 1) The POR_B input must be immediately asserted at power-up and remain asserted until after the last power rail is at its working voltage. 2) No power-up sequence dependencies exist between the supplies shown shaded in gray. 4.2.2 Power-Down Sequence The power-down sequence is recommended to be the opposite of the power-up sequence. In other words, the same power supply constraints exist while powering off as while powering on. 4.2.3 Resume Sequence When the i.MX50 is resuming from STOP mode, there are some special sequencing considerations. The resume timing is determined by the following internal counters: 1. STBY_COUNT. This register is in the CCM block and may be set to a maximum of 16 x 32 kHz cycles, or 500 μsec. |
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