LPC MicrocontrollersのトピックUnused Pins of LPC4322 Microcontroller

Unused Pins of LPC4322 Microcontroller

SrinathVelavan — Fri, 19 May 2023 10:26:17 GMT

How do we configure the unused pins on an LPC4322 Microcontroller? At present, I have left them unconnected with no-connect on schematic for my board.

Re: Unused Pins of LPC4322 Microcontroller

ZhangJennie — Sun, 21 May 2023 11:39:49 GMT

All I/Os default to input with pullup after reset. So it has internal pullup.

For non-opendrain GPIO, left unconnected if driven LOW and configured as GPIO output with pull-up or pull-down disabled by software. Or just default setting (input with pullup) is ok

For opendrain GPIO, left unconnected if driven LOW and configured as GPIO output by software.

Please follow below to configure the unused pins.

Hope this helps,

Jun Zhang

Re: Unused Pins of LPC4322 Microcontroller

SrinathVelavan — Mon, 22 May 2023 03:57:35 GMT

Thank you for your answer.