sequencing issue in designing power section in DSP processor for Modem?

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Mohamed Adam

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Hi guys, i have a problem with power sequencing please help me the problem is , i have DSP processor have three voltages 1.05(core), 1.8(IO), and 1.8(DDR2 controller) i want to generate 1.8V for IOs and DDR2 controller from one regulator the problem is in sequencing between IOs and controller , IOs must power up before DDR2 controller , how i can do this without drop in power (1.8)




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