Migration from STM32F105 board to STM32F411 board

[Haithem sunny]

Posted on April 09, 2018 at 08:27

Hi every body,

Really I need your help in order to see if there are any extra change in the schematic side.

Right now I use the same board used for STM32F105 to my new STM32F411.

What I did:

  - I just change the old micro-controller 'F105' with the new one 'F411'.

  - Migrate all the SW application to the new library of 'F411'.

  - Upload the new FW to 'F411'.

Results:

 - Face not stable result on the UART port 'terminal'.

 - My application doesn't work properly.

  => is it really accepted to use the same board used for STM32F105 to the new one STM32F411 (

chips have an identical pinout

) ?

               => if yes, there is any extra change I have to do it it on the board ( Quartz, . . . ).

#migration #stm32f411-stm32f105 #stm32f105-board-to-stm32f411-board

[Nesrine M_O]

Posted on April 09, 2018 at 11:00

Hi

haithem.sunny

,

Please try to refer to

http://www.st.com/content/ccc/resource/technical/document/application_note/group0/e9/c4/6b/99/4e/d3/4e/a0/DM00325582/files/DM003255pdf/jcr:content/translations/en.DM003255pdf

application note.

-Nesrine-

[Haithem sunny]

Posted on April 09, 2018 at 14:15

Hi

ELMHIRI.Syrine

Thanks for the link.

I Looked at it before I start the migration.

For that I have to ask you some questions:

Right now I have the PCB card Designed for STM32F

Our objective is to use the same PCB card to STM32F411 by porting the SW application to the new library (Done).

- For the SW side we did all the recommended change based on the application note :

/external-link.jspa?url=http%3A%2F%2Fwww.st.com%2Fcontent%2Fccc%2Fresource%2Ftechnical%2Fdocument%2Fapplication_note%2Fgroup0%2Fe9%2Fc4%2F6b%2F99%2F4e%2Fd3%2F4e%2Fa0%2FDM00325582%2Ffiles%2FDM003255pdf%2Fjcr%3Acontent%2Ftranslations%2Fen.DM003255pdf

-For the HW side we made only one difference on the

PB11 (STM32F105) -----> VCAP_1 (STM32F411) adding one capacitor.

For the HW side have you any suggestion or recommendation?

- (We have the QFP64 package of STM32F411).

- Our application use I2C, UART 2 and USB-OTG for charging the battery.

Thanks in advance and Best Regards,

Haithem

[Tesla DeLorean]

Posted on April 09, 2018 at 15:21

Not used the F411, would focus on the supply and VCAP pins. Check stability of supply on VCAP pin, should be ~1.25V

Make sure the VOS settings are correct for the F4 and max speed being run at.

If you have the board running you should do some validation with the internal clocks output via PA8 MCO pin.

Review the USART signals with a scope and quantify the instability.

[Haithem sunny]

Posted on April 10, 2018 at 12:26

Turvey.Clive.002

,

-VCAP pin, should be ~1.25V

>> I check it: OK

Make sure the VOS settings are correct for the F4 and max speed being run at.

>> I check it: OK

Our application hang up after few seconds.

Any comment will be welcome.

Thanks,

BR,

[Haithem sunny]

Posted on April 12, 2018 at 08:25

Thanks for your help.

Problem resolved by adding Ceramic capacitor (Low ESR, ESR<1ohm)= 4.7uF to the pin number 30 of the package number QFP64.

this is the maim lines pin out difference on STM32F105 and STM32F411.