abdel boss

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8 years, 10 months ago.

information about NUCLEO-F401RE

Hello Mbed Developers

i am about to start a project on the NUCLEO-F401RE platform , and before buying the platform i want to know some information about it , so my questions are :

what is the convertion time of the ADC ?

what is the number of bits in the intern counters , theire frequency , and the speed it need to change the PWM duty cycle ?

the time needed to do somme instruction ( like multiplication ) ?

sorry for my english

thanks ,

Question relating to:

Last updated: 20 Apr 2021
Affordable and flexible platform to ease prototyping using a STM32F401RET6 microcontroller.

2 Answers

Tom de boer
8 years, 10 months ago.

Hi Abdel,

You can find all that in the STM32F401RE datasheet (http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00102166.pdf):

Conversion time of the ADC: 0.5 µS (min) to 16.20µS (max (first time)).

For your second question, I'm just going to quote the datasheet real quick: "Up to 11 timers: up to six 16-bit, two 32-bit timers up to 84 MHz, each with up to four IC/OC/PWM [...]"

And a single *unsigned* multiplication can be done in a single instruction, so 1/84Mhz of a second. Adding three register moving instructions to that: 4 cpu cycles: 4.7619048 nanoseconds.

Does this somewhat answer your question?

Accepted Answer

thank you very much Mr Tom , your answers are exactley what i need

posted by abdel boss 17 Jun 2015
David Fletcher
8 years, 10 months ago.

You could try using this link http://www.keil.com/dd/docs/datashts/st/stm32f4xx/dm00086815.pdf , to find the information you need. Happy reading.

thank you very much David ,

posted by abdel boss 17 Jun 2015

This does not help as it is only a functional overview - no hints, how to do it...

posted by Stefan Levedag 04 Oct 2018