STM32F767 Nucleo144 - Default clock frequency

[Ciro Donnarumma]

Posted on April 28, 2018 at 12:54

Hi,

what is the default system clock frequency (previous that all clock configuration take place) on the development board 'STM32F767 Nucleo-144'?

Where I can find this information?

Thank you for the answer.

[Tesla DeLorean]

Posted on April 28, 2018 at 13:28

I'm confused about what exactly the question is asking.

The F7 has an HSI clock of 16 MHz that it starts with.

The NUCLEO-144 has an 8 MHz HSE clock source, ie HSE_BYPASS

Most of the examples engage the PLL and run at 216 MHz

>>Where I can find this information?

The Reference Manual for the chip family

The User Manual/Schematic for the NUCLEO-144

The Data Sheet for the chip

The Examples in the HAL source trees

[Ciro Donnarumma · Accepted solution]

Posted on April 28, 2018 at 14:07

I would know what is the default clock source, and its clock frequency, before the PLL and the clock distribution network is initialized.

[Ciro Donnarumma]

Posted on April 28, 2018 at 14:15

Thank you very much!

[Tesla DeLorean]

Posted on April 28, 2018 at 14:10

Runs at 16 MHz (HSI) out of reset. Chip thing, not a board thing.