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?
The anomaly will appear in Rev D of the BF522/4/6 list and Rev F of the BF523/5/7 list. We anticipate that the updated BF522/4/6 list will appear online at the end of the month and the BF523/5/7 list will go online sometime next month.