All unused pin should be configured as stated in Table 7-6.
|FUNCTION||SIGNAL DESCRIPTION||PIN NUMBER||ACCEPTABLE PRACTICE||PREFERRED PRACTICE|
|GPIO||General-purpose input or output||Wake up I/O source should not be floating during hibernate. |
All the I/O pins will float while in Hibernate and Reset states. Ensure pullup and pulldown resistors are available on board to maintain the state of the I/O.
Leave unused GPIOs as NC
|No Connect||NC||26||Unused pin, leave as NC.||Unused pin, leave as NC|
|SOP||Configuration sense-on-power||Ensure pulldown resistors are available on unused SOP pins||69.8K Pull down resistor on SOP0 and SOP1 used as switch control pins, 100K pull down on SOP2|
|Reset||RESET input for the device||Never leave the reset pin floating|
|Clock||RTC_XTAL_N||When using an external oscillator, add a 100-kΩ pullup resistor to VIO|
|WLAN_XTAL_N||When using an external oscillator, connect to ground if unused|
|JTAG||JTAG interface||Leave as NC if unused|