STM32L151RE HSI&HSE

[chaitanya jasti]

Posted on May 11, 2017 at 06:33

Hi,

We are using STM32L151RE in our project and i need to confirm which clock source i should use for my applicaion?

Is there any document to decide (or) what are the disadvantages and advantages of HSE and HSI.Please provide any document

Thanks 

[S.Ma]

Posted on May 11, 2017 at 08:55

Hsi brings cost saving at frequency tolerances cost. So it depends. Check if for usart the baud rate tolerances. For usb, hse is certainly needed, etc...

[Imen.D]

Posted on May 11, 2017 at 11:50

Hi

jasti.chaitanya

,

Refer to the

http://www.st.com/content/ccc/resource/technical/document/application_note/bf/94/f5/49/96/52/4e/75/CD002735pdf/files/CD002735pdf/jcr:content/translations/en.CD002735pdf

for more clarification on your hardware and this application note

http://www.st.com/content/ccc/resource/technical/document/application_note/c6/eb/5e/11/e3/69/43/eb/CD002216pdf/files/CD002216pdf/jcr:content/translations/en.CD002216pdf

.

I hope that this brings some help to you.

Imen