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Nucleo-H745ZIQ clock configuration required to run at 480 MHz

Nsg1987
Associate III

Hello,

I want to use Nucleo-H745ZIQ board with operating clock at 480 MHz for M7 and 240 MHz for M4. Below is the clock configuration.

Nsg1987_0-1688706117562.png

Under RCC, options are either PWR_LDO or PWR_EXTERNAL_SOURCE_SUPPLY selection enabled. Voltage scale as Power Regulator Voltage Scale 0. 

Nsg1987_1-1688706221566.png

Jumper settings on board is as follows.

Nsg1987_2-1688706329677.png

External supply given is +9 V to VIN. 

While loading the code in the controller, I received error as No STM32 target found. 

I reset the core with STM32Cube Programmer, and found board working again.

But as soon as I repeat the above procedure to load the code with maximum clock selection, I got the same error.

Then I cut down the operating speed to 75 MHz for M7 and 60 MHz for M4 and selected Internal power supply and programmed again. Found working okay.

Can anyone let me know what wrong is going while I am trying to load the board with M7-480 MHz and M4-240 MHz?

Is there any wrong selection of parameters or something else.

 

Regards,

Nikhil

 

 

 

1 ACCEPTED SOLUTION

Accepted Solutions
Nsg1987
Associate III

Solution:

Nsg1987_0-1688978293697.png

Nsg1987_1-1688978313908.png

connected external 9V to VIN pin of the board.

 

Thank you all for your support.

 

 

 

View solution in original post

12 REPLIES 12
AScha.3
Chief

set rcc to PWR_LDO and try.

If you feel a post has answered your question, please click "Accept as Solution".

@AScha.3 

Did with PWR_LDO but found same issue.

 

Nsg1987
Associate III

@Foued_KH I see in some post that you had some solution similar to my query.

could you please see and help me with the issue mention above. 

Nikhil 

AScha.3
Chief

use set debug :

AScha3_0-1688717227510.png

+

is normal debug connection working ?

control voltages when debug : vin, 5v , 3v3 , 3v3 for st-link .

If you feel a post has answered your question, please click "Accept as Solution".

@AScha.3 

Debugger setting... Software system reset

Nsg1987_0-1688718848574.png

Normal debug is working if I set clock frequency to less than 100 MHz and with below set up

Nsg1987_1-1688718941338.png

control voltages are also okay. 

Nikhil

 

 

MM..1
Chief II

How current is sink from your 9V? Is stable

Hello @Nsg1987 , 

Please make sur that you are following the recommendation in this section : 6.4.6 Debugging while using VIN or EXT as an external power supply.


Foued

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

@Foued_KH 

Yes...I am following the same sequence.

Nsg1987_0-1688724666091.png

But still facing the same issue. Could you please suggest clock configuration required to operate the board with maximum speed i.e. 480 MHz

 

Nikhil

@MM..1 

roughly 120 mA. 9 V supply is given from regulated power supply which has capability to provide up to 5 A current if required and power supply is stable. VIN pin is accepting voltages from 7 V to 11 V. 

Nikhil