Lpc2000

Hello

I'm designing a little device with the LPC2106. I have worked with
this MCU but never in the situation that I wanted to work now.
I need to power the LPC2106 only with 3.3V, and also attach a FTDI232
USB (to program the LPC, and also as a virtual Comm for the PC).

One of the problems comes with the power supply for the LPC, can I
give 3.3V directly to the MCU, and connect a regulator to the 3.3V
line to generate 1.8V?  I always connected 3.3V and 1.8V "in parallel"
as a 5V supply feed them, but now I only have 3.3V and don't know if
there is a problem to give first (for a few mSec) 3.3V and then 1.8V.

And last but not least, I need to power the FTDI with 3.3V, which is
not a problem, but I will only have 5V when connected to the USB, then
I will only have 3.3V. So I will connect and power VCCIO with 3.3V but
the other voltage sources will "float" when the device is not
connected. Might this cause any problem?

Thanks very much,
Ezequiel L. Aceto