External oscillator STM32L476Jxx (Sensor Tile)

[Nitish Arora]

Posted on December 30, 2016 at 11:13

I am designing a new custom board replicating Sensor Tile.The problem is STM32l476jxx (sensor tile) is not using external crystal for core clock. its uses Bluenrg reset pin on the external clock oscillator input pin (PH0). So shall i shift the reset pin to any another pin or shall i use the internal oscillator. Please suggest...

I have attached a pdf of sensor tile schematic. On page 5, the PH0 is connected to reset of bluenrg.

Please suggest the solution.

#stm32l476jgy6 #oscillator #sensor-tile

[Seb]

Posted on December 30, 2016 at 12:21

Normally on most STM32L4 there should be MSI feature which enables generation of precise high frequency clock up to 48MHz from 32khz one. Then using PLL it is possible to generate any higher SYSCLK frequencies with high precision (USB FS or OTG)

Remember that PH0 and PH1 are weaker pads than usual as they are designed for optional crystal. They would prefferably be used as digital input. Check out the datasheet. 

Good luck!

[Oliver Beirne]

Posted on December 30, 2016 at 12:48

Hi

Arora.Nitish

I have moved your thread to the

https://community.st.com/community/stm32-community/stm32-forum?sr=search&ampsearchId=7dc667fe-be1a-41d6-bff6-92f153108055&ampsearchIndex=0

where product related questions are posted.

Thanks

Oli

[Bertrand DENIS]

Posted on December 31, 2016 at 16:26

Yes, as highlighted by Seb, you should not need an external crystal for HSE. Or maybe you can explain us why you would need it ?

[Nitish Arora]

Posted on January 04, 2017 at 07:14

Thank You Sir.

:)

[Nitish Arora]

Posted on January 04, 2017 at 07:15