1) We are not using USB interface should we keep pins T29, R29, T30 and R30 unconnected? The manual doesn't say anything about what to do with those power pins in such case. The common sense suggests to keep them float.
2) AM3892 manual says that pins N27 (VDD_USB_0V9) could be connected to 0.9V or CVDDC (1.0V). But the proper power up sequence enable 1.0V power supply before 0.9V power supply. We are wondering if there is any risk that even not used USB PHY but power up in not recommended order might cause latch up problems? The proper power up sequence is: 3.3V, 1.0v_AVS, 1.0V, 1.8V, 1.5V and 0.9V.
3) Do we need to power up DVDD_DDR1 power pins with 1.5V if the second for DDR[1] will not be used?
Thanks, Rinzai Bell
