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STM32F767 Nucleo144 - Default clock frequency

Ciro Donnarumma
Associate II
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.

1 ACCEPTED SOLUTION

Accepted Solutions
Ciro Donnarumma
Associate II
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.

View solution in original post

4 REPLIES 4
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

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Ciro Donnarumma
Associate II
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
Associate II
Posted on April 28, 2018 at 14:15

Thank you very much!

Posted on April 28, 2018 at 14:10

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

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