Naon default boot sequence can be changed by optional external circuitry.
===PCB Carrier board specific design guidelines===TBD<br/>'''Please refer first to [[Carrier board design guidelines (SOM)|Carrier board design guidelines]].'''<br/>In this section hardware guidelines valid for NAON are analized. The information provided here complete the [[Carrier board design guidelines (SOM)|Carrier board design guidelines]] for some specific interfaces.
Please ==== Mechanical ====TBD==== Interfaces Guidelines ====For interfaces not mentioned in this section, refer also to the generic guidelines.===== USB ========= Schematics ====Naon can support (depending on model) 1 USB 2.0 OTG Full speed interface and 2 USB 2.0 Full speed device interface. See [[Carrier board PCB design guidelines (NAON SOM)|Carrier board PCB design guidelines]]page for further details to how properly connect USB in respect of EMI issue solving. ==== PCB ====Table listeb below integrated the general basic guidelines table{| {{table border=1}}| align="center" style="background:#f0f0f0;"|'''Parameter for USB Differential Pairs'''| align="center" style="background:#f0f0f0;"|'''Min'''| align="center" style="background:#f0f0f0;"|'''Typ'''| align="center" style="background:#f0f0f0;"|'''Max'''|-| Max traces length ||-||-||14"|}
==Software==
