Why is my HSE crystal not working on NUCLEO-L433RC-P board ?

[freeflyer]

I have fitted an 8MHz crystal with 8.2pF capacitors to the NUCLEO-L433RC-P development board, but it is not working.

The software goes to an error handler when configuring the clocks, becuase of a time out iduring the function HAL_RCC_OscConfig (wait till HSE is ready)...

/* Set the new HSE configuration ---------------------------------------*/
 __HAL_RCC_HSE_CONFIG(RCC_OscInitStruct->HSEState);
 
 /* Check the HSE State */
 if(RCC_OscInitStruct->HSEState != RCC_HSE_OFF)
 {
 /* Get Start Tick*/
 tickstart = HAL_GetTick();
 
 /* Wait till HSE is ready */
 while(READ_BIT(RCC->CR, RCC_CR_HSERDY) == 0U)
 {
 if((HAL_GetTick() - tickstart) > HSE_TIMEOUT_VALUE)
 {
 return HAL_TIMEOUT;
 }
 }
 }

The part numbers for the crystal and capacitors are below...

Crystal: CG04874-8M

https://www.ndk.com/en/products/upload/lineup/pdf/NDKX03-00009_en.pdf

Capacitors: KGM05ACG1H8R2CH

https://datasheets.kyocera-avx.com/C0GNP0-KGM.pdf

The clock configuration is below...

The board modifications are below:

- fitted X2

- fitted C47 and C48

- connected solder bridges SB67 and SB69

- disconnected solder bridges SB68 and SB70

PS.  This relates to my other post about I2S master clock speed...

https://community.st.com/t5/stm32-mcus-products/can-i-use-an-internal-rc-oscillator-to-achieve-an-i2s-master/m-p/859639#M289324

[Andrew Neil]

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@freeflyer wrote:

Is it not possible to buy this development board with the 8MHz crystal and capacitors already fitted ?

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I think it is, indeed, not possible.

Perhaps you can find a rework facility to do this for you?

The Nucleos are targetted for simple evaluation - It sounds like you're at the point where you need to move to your own PCB...

[gbm]

I do not quite understand why you need this crystal. With LF crystal present you may easily generate accurate high frequency clock using MSI synchronized to LSI.

[Andrew Neil]

Indeed.

And you have a crystal-generated HSE clock - from the ST-Link.

[freeflyer]

Because I need an I2S master clock of 12.888MHz as I posted here...

https://community.st.com/t5/stm32-mcus-products/can-i-use-an-internal-rc-oscillator-to-achieve-an-i2s-master/m-p/859639#M289324

I cannot seem to achieve a 12.888MHz I2S master clock using HSI or MSI

[freeflyer]

I have removed the ST Link top part of the board and now use an STLINK-V3MINIE on the header pins (for VCC, GND, RST, SWDIO and SWCLK).

Are you saying I can feed the HSE clock on the STLINK-V3MINIE i into the NUCLEO-L433RC-P board ? 

If so, how ?

[mƎALLEm]

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@Andrew Neil wrote:

Indeed.

And you have a crystal-generated HSE clock - from the ST-Link.

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Except for STLINK-V3, you configure the STLINK  to generate the MCO signal from the crystal using STM32CubeProgrammer STLINK updater tool. Which is not the case for NUCLEO-L433.

@freeflyer Why you need to add a crystal while you can retrieve the precise clock (8MHz) from ST-LINK-V2?

But for that you need to:

1-  Solder: SB64:

2- Solder R19: you can put  0 ohm

3- Configure the HSE in Bypass mode in CubeMx.

[freeflyer]

I had to order the CG04874-8M crystal from Digikey, but as this comes from the US (to the UK) the delivery cost and time is high.

Could I use this crystal (ABM8AAIG-8.000MHZ-V2R-T3) from RS instead...

https://docs.rs-online.com/861b/A700000012715866.pdf

[gbm]

@Andrew Neil Not on L4 boards - disconnected by default.

[gbm · Accepted solution]

@freeflyer If something is possible with 8MHz HSE then it's also possible with 8 or 4 MHz MSI.

[Andrew Neil]

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@freeflyer wrote:

Because I need an I2S master clock of 12.888MHz

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Could you use an external 12.888MHz oscillator instead?

(or some other suitable frequency)