Depending on the NuMicro® Family series, there is a different default state of the GPIO for selection. Users can select the default state of a GPIO by setting the CIOINI(Config0[10]).

The following table lists the settings of CIOINI for each NuMicro® Family series:

NuMicro® Family Series	CIOINI = 1 (Default)	CIOINI = 0
Mini51 Series	Input tri-state	Quasi bi-direction
Mini58 Series	Input tri-state	Quasi bi-direction
M051 Series	Quasi bi-direction	Input tri-state
M0518 Series	Quasi bi-direction	Input tri-state
NUC100/120 Series	Quasi bi-direction	Input tri-state
NUC130/140 Series	Quasi bi-direction
NUC122 Series	Quasi bi-direction
NUC123 Series	Quasi bi-direction
NUC131 Series	Quasi bi-direction	Input tri-state
NUC200/220 Series	Quasi bi-direction	Input tri-state
NUC230/240 Series	Quasi bi-direction	Input tri-state
Nano100 Series	Input tri-state
Nano1x2 Series	Input tri-state
NUC442/472 Series	Input tri-state	Quasi bi-direction
M451 Series	Input tri-state	Quasi bi-direction
NUC505 Series	Input tri-state

Produkte:	Mikrocontroller ,Arm Cortex-M0-MCUs ,M051-Base-Serie ,M0518-Serie ,M0519-Serie ,Mini51-Base-Serie ,Nano100/102-Base-Serie ,Nano110/112-LCD-Serie ,Nano120-USB-Serie ,Nano130-Advanced-Serie ,NUC029-Serie ,NUC100/200-Advanced-Serie ,NUC120/122/123/220-USB-Serie ,NUC130/230-CAN-Serie ,NUC131-NUC1311-CAN-Serie ,NUC140/240-Konnektivität-Serie ,Arm Cortex-M4-MCUs ,M451-Base-Serie ,M451M-Serie ,M452-USB-Serie ,M453-CAN-Serie ,NUC442/472-Serie ,NUC505-Serie
Applikationen:
Funktion:	Peripherals,I/O,GPIO

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What is the default state of the general purpose I/O (GPIO)? Datum：2015-07-17

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