In the TWR schematics, I see that the RCONxx (GPIO Boot override) lines are "driven" with active IC buffer devices at POR. Is this required, or can the lines be simply pulled up or down with appropriate resistors? I know the manual has a ton of info, but I can't find (yet) what the status of these GPIO lines are at POR...? High-Z? Basically my question refers to all the lines, including: - BOOT_MODE[1:0]... selects the boot mode - RCON5, 6, and 7... selects the boot device - all the other RCON lines that have particular meaning for a given boot mode and device... Can we just use resistors or do we need active devices with drive capability? Thank you.