Can the input volt of I/O be higher than MCU VDD?

RE: Can the input volt of I/O be higher than MCU VDD?

Sigurd — Wed, 05 Sep 2018 07:42:48 GMT

Hi,

[quote userid="71361" url="~/f/nordic-q-a/38183/can-the-input-volt-of-i-o-be-higher-than-mcu-vdd"]When NRF52832 work with 2.5V, It is can accept 3.0 or 3.3V I/O input?[/quote]

No, as shown here, the max I/O pin voltage is VDD + 0.3 V. When you have powered the nRF52832 using 2.5V, then the maximum pin voltage is 2.8 V.

The easiest solution is just to run the nRF52832 at 3.0V, but if that is not an option, then might be able to find suitable a bi-directional level shifter that solves this.

RE: Can the input volt of I/O be higher than MCU VDD?

Yi-Wei — Wed, 05 Sep 2018 06:20:08 GMT

I can't understand.

RE: Can the input volt of I/O be higher than MCU VDD?

brian fleming — Wed, 05 Sep 2018 03:12:39 GMT

sorry that link didn't work so try typing the link in the screen shot below.

RE: Can the input volt of I/O be higher than MCU VDD?

brian fleming — Wed, 05 Sep 2018 03:09:15 GMT

Check out section 6.2 in this www.st.com/.../stm32l476je.pdf