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power up sequence for BF527

Question asked by HEGDE on May 15, 2009
Latest reply on Sep 2, 2009 by JoeT

We are designing a low power battery operated portable design. The processor
operating voltages are VDDINT= 1.2V(External), VDDEXT= 1.8V, VDDUSB= 3.3V and
others at the recommended voltages. In our board we want to generate 3.3V
before 1.2V and 1.8V to facilitate power sequencing for the Ethernet Phy.
Please tell me whether the processor needs any specific power up sequence and
whether the processor will operate properly at the conditions mentioned above?
Will the 3.3V coming before the 1.2V and 1.8V affect/Damage the processor?

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