WIZnet Developer Forum

Connection of unused pins


I have been using the WizFi210 module connected with only the power pins (9,32,33,34), ground pins, UART0 pins, GPIO29 and GPIO27 for F/W update.

Is it advisable to connect any other unused pins with either pull-up or pull-down resistors (depending on every specific case) or I can just leave all unused pins unconnected (floating) ?

Thank you for any clarification !


It is no problem to connect only the power pins, ground pins, UART0 pins, GPIO29 and GPIO27.
But we recommend to use as reference Schematic.

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