What to do with unused pins?

[lpcware]

Content originally posted in LPCWare by Muis on Fri Oct 04 08:32:58 MST 2013
In all low-power examples unused pins are set to output and low. Is this the recommended configuration and is the consumption significantly lower than leaving those pins as inputs (with no pull up/pulldown)?

[lpcware]

Content originally posted in LPCWare by NXP_Paul on Fri Oct 04 09:34:30 MST 2013
It is never a good idea to have an input that is left floating as this may increase power consumption.
The recommended configuration is to place the pins in output mode, but disable the pull-ups/pull-downs.  Assuming that there is nothing connected to the pins, you can either have them in a high or low state.
The following application note details some ways to minimize current consumption:
http://www.lpcware.com/content/nxpfile/an11027-using-lpc1100-low-power-modes-and-wake-times-lpcxpres...