Skip to main content
Y
yonggeon
Associate II
January 11, 2025
Solved

GPIO pin max current input (sink)

  • January 11, 2025
  • 1 reply
  • 1304 views

I want to use led with following connection and i remember that I've seen this application somewhere on the Internet:

3V3 - LED - RESISTOR - STM32 PIN

I've seen the max total current output of MCU then is there any max total input current of MCU?

This topic has been closed for replies.
Best answer by Andrew Neil
@yonggeon wrote:

 I've seen this application somewhere on the Internet:

LoL - that is the standard way to use an LED with any microcontroller!

 

@yonggeon wrote:

is there any max total input current of MCU?

Yes, these figures will be in the Datasheet for the chip - the Electrical Specifications section.

 

1 reply

Andrew Neil
Andrew NeilBest answer
Super User
January 11, 2025
@yonggeon wrote:

 I've seen this application somewhere on the Internet:

LoL - that is the standard way to use an LED with any microcontroller!

 

@yonggeon wrote:

is there any max total input current of MCU?

Yes, these figures will be in the Datasheet for the chip - the Electrical Specifications section.

 

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
Y
yonggeonAuthor
Associate II
January 11, 2025

does "injected current" mean input current?

Andrew Neil
Andrew Neil
Super User
January 11, 2025

I don't think so - context needed.

You are looking for the GPIO pin current sink capacity.

What chip are you using?

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
Terms & ConditionsAccessibility statement