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AM3354: Pin connections

Part Number: AM3354

I have 2 questions:
1. Can I left floating those pins i don't use? Or which pins requires external PU/PD resistors?
2. I'm goint to use iNAND flash SDIN8DE2-16G-XI , that have hardware reset pin in MMC BUS, but in AM335x don't exist hardware reset pin in MMC BUS. 
    Can I use any GPIO pin for that function?