CURRENT CONSUMPTION BY INTERNAL PULL UP

RE: CURRENT CONSUMPTION BY INTERNAL PULL UP

zuhaib — Thu, 28 Jul 2022 04:36:53 GMT

thanks can you also please tell me what really is high drive and standard drive?

and I also want the current consumption for SPI and I2C .

RE: CURRENT CONSUMPTION BY INTERNAL PULL UP

zuhaib — Thu, 28 Jul 2022 04:35:00 GMT

exactly thanks for the answer i was working and done some research last night and i also think of the same solution 🙂

RE: CURRENT CONSUMPTION BY INTERNAL PULL UP

hmolesworth — Wed, 27 Jul 2022 16:30:48 GMT

You can cheat; only enable the pull-up then read the pin input and see if it is high (switch open) or low (closed). Then disable the pull-up.

RE: CURRENT CONSUMPTION BY INTERNAL PULL UP

Bendik Heiskel — Wed, 27 Jul 2022 13:36:50 GMT

[quote user="zuhaib"]what if I dont pull up the the gpio ? and try the same thing?[/quote]

If the GPIO pin is not pulled up it will be in a undefined state when the button isn't pressed This will lead to unexpected behavior and may lead to a higher current draw, if for example a interrupt is used. I would recommend using a pull up for the button in this configuration.

[quote user="zuhaib"] what is the minimum level of voltage for a logic 0 and logic 1 for the gpio?[/quote]

For logic 0 the voltage range is VSS to 0.3*VDD, and for logic 1 0.7*VDD to VDD.

More information about the GPIO peripheral can be found here:

https://infocenter.nordicsemi.com/topic/ps_nrf52833/gpio.html?cp=4_1_0_5_7_2#unique_1576379008

RE: CURRENT CONSUMPTION BY INTERNAL PULL UP

zuhaib — Wed, 27 Jul 2022 10:56:04 GMT

what if I dont pull up the the gpio ? and try the same thing? what is the minimum level of voltage for a logic 0 and logic 1 for the gpio?

RE: CURRENT CONSUMPTION BY INTERNAL PULL UP

Bendik Heiskel — Wed, 27 Jul 2022 10:26:06 GMT

Hi,

When using the internal pullup there will not be any leakage current. Current will only flow when the button is pushed, this current will be equal to VDD/13k.

Best regards,

Bendik