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IMX53CEC Datasheet(PDF) 27 Page - Freescale Semiconductor, Inc |
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IMX53CEC Datasheet(HTML) 27 Page - Freescale Semiconductor, Inc |
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27 / 204 page  Electrical Characteristics i.MX53xD Applications Processors for Consumer Products, Rev. 2 Freescale Semiconductor 27 Figure 2 shows the power-up sequence diagram. Figure 2. Power Up Detailed Sequence 1 NOTE Need to ensure that there is no back voltage (leakage) from any supply on the board towards the 3.3 V supply (for example, from the parts that use both 1.8 V and the 3.3 V supply). 1. If fuse writing is required, VDD_FUSE should be powered ON after NVCC_CKIH is stable. NVCC_CKIH (in any order, after NVCC_CKIH POR_B Δt>0 Δt>0 VCC 90% 90% (in any order, if needed) Δt>0 90% 90% NVCC_SRTC_POW (may remain ON) 90% IO Supplies below or equal to IO Supplies above 2.8 V nom./3.1 V max 2.8 V nom./3.1 V max. 90% Δt>0 90% Δt>0 Δt>0 VDD_REG NVCC_EMI_DRAM Δt> 0 (in any order) VP, VPH Δt>0 90% ramp up start, if needed) (in any order) VDDA,VDDAL1,VDDGP Δt>0 90% |
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