2023-02-27 05:34 AM
Hi,
I have migrated from STM32L4S5ZI --> STM32U575ZIT6 for one of our custom designed board.
I am trying to configure 96MHz HCLK using Clock configuration in my *.ioc file and just toggle LEDs with a delay of 1 sec with the generated code & this logic.
My observations are as follows:
for all these cases images are attached. I have also attached my schematics and relevant code snippet and also the project workspace.
Upon survey I found that such issues comes when VDDA & VSSA are not connected / decoupled. Upon probing my board I confirmed both VDDA & VSSA are perfect 3.3V & GND respectively.
Please suggest possible solutions at the earliest.
Solved! Go to Solution.
2023-05-18 02:49 AM
Today we got the actual solution to the problem.
While creating a new project we need to select Timebase Source as SYSTICK under System core option in .ioc file.
After doing so, I was able to make the clock work properly.
IDE must have thrown an error or warning in this case. I hope this issue will be addressed in upcoming versions of STM32cubeide
2023-03-05 05:38 PM
The PH1_OSC_OUT pin should be floating. Read the AN4555 and AN5373.
2023-03-05 08:28 PM
hi
Thank you for your reply.
For me, the problem is that PLLCLK is not working with any of the input clock (HSI / HSE). PLLCLK must work with internal HCI if i would have made the wrong connection. I am unable to generate any frequency output out of PLL.
Your solution may help if HSE clock is not working but in my case since I am connecting a external frequency source so this configuration is ok. Only thing is that while configuring RCI I need to select BYPASS CLK. however, as mentioned in my question the HSE clock is working but after tweaking the voltage levels.
2023-03-12 05:03 PM
The PH1_OSC_OUT grounded can be OK for HSI/MSI configurations, if the HSE is actually disabled. But for HSE in bypass mode it definitely is not OK! As I said - read the application notes. And why is it so hard to just remove the R131?
2023-03-12 11:41 PM
hi
I have removed R131 but no change.
Anyways please think I am not using HSE,
I just want to provide some 80MHZ using HSI clock source. My real problem is that PLLCLK is not responding.
2023-03-13 01:20 AM
2023-03-16 03:19 AM
2023-03-16 06:09 AM
2023-03-21 12:50 AM
@Agour.1 and now ?
2023-03-21 07:07 AM
hi sorry for the delayed response. I got held up with something else so couldn't test. I will update you within a day