Configuration of unused GPIO pins in STM32F103RBT6

ajishgopalr · ‎2012-10-14

Posted on October 15, 2012 at 08:40

Hello Members,

I am using STM32F103RBT6 microcontroller. I would like to know which is the best configuration for unused GPIO pins inorder to save power.

Waiting for a reply...

Embedded_Geek

toantq3 · ‎2012-10-15

Posted on October 15, 2012 at 09:30

I think, GPIOs are set Output pull down is best way.

From: gopal.ajish

Posted: Monday, October 15, 2012 8:40 AM

Subject: Configuration of unused GPIO pins in STM32F103RBT6

Hello Members,

I am using STM32F103RBT6 microcontroller. I would like to know which is the best configuration for unused GPIO pins inorder to save power.

Waiting for a reply...

Embedded_Geek

emalund · ‎2012-10-15

Posted on October 15, 2012 at 14:55

if you are concerned with power usage, set them as input

Erik

Tesla DeLorean · ‎2012-10-15

Posted on October 15, 2012 at 15:38

if you are concerned with power usage, set them as input

Second that. Floating input.

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waclawek.jan · ‎2012-10-16

Posted on October 16, 2012 at 09:22

>> if you are concerned with power usage, set them as input

> Second that. Floating input.

You surely are joking, gentlemen.

JW

zzdz2 · ‎2012-10-16

Posted on October 16, 2012 at 10:00

> You surely are joking, gentlemen.

Sure they are, digital floating input can drain some power, analog input may be better, pulldown seems best.

leventeyigel52 · ‎2012-10-16

Posted on October 16, 2012 at 10:27

I think u could close the clock signal, which you don't use

RCC_APB2PeriphClockCmd(uint32_t RCC_APB2Periph, FunctionalState NewState)

for ex:

RCC_APB2PeriphClockCmd(GPIOE , DISABLE);