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STMicroelectronics / STM32CubeH7

STM32Cube MCU Full Package for the STM32H7 series - (HAL + LL Drivers, CMSIS Core, CMSIS Device, MW libraries plus a set of Projects running on all boards provided by ST (Nucleo, Evaluation and Discovery Kits))
https://www.st.com/en/embedded-software/stm32cubeh7.html
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STM32H7B3I-DK PLL3 VCO output exceeds 560MHz limit #275

Open sirius506 opened 1 year ago

sirius506 commented 1 year ago

STM32H7B3I-BK BSP LCD driver sets PLL3 VCO output to 800MHz. I know it works, but Data sheet says maximum value is 560MHz.

https://github.com/STMicroelectronics/STM32CubeH7/blob/91d4c89228e766a968f8daebc78eb7143d95184e/Drivers/BSP/STM32H7B3I-DK/stm32h7b3i_discovery_lcd.c#L437-L450

TOUNSTM commented 8 months ago

Hello @sirius506,

Sorry for the delayed response. Could you please send me the document in which you find this information?

With regards,

sirius506 commented 8 months ago

Please refer STM32H7B3I datasheet Table 55 on page 112. It says PLL VCO output max freq is 560MHz.

You can also try to set above listed PLL3 settings on the CubeMX clock config screen, then you'll see it responds with error indication (DIVN3 = 200 is too big).

TOUNSTM commented 7 months ago

ST Internal Reference: 177140