About TDJ

TDJ · 2024-06-23

According to RM0456, p. 3459So in addition to CCx pins also PB5 and PB14 (DBCCx) cannot be used. The above does not make much sense to me. I imagine (only imagine) that internally DBCC support is implemented like shown below and for "dead battery" to...

TDJ · 2024-05-30

I am wondering if VSSA voltage can be slightly lower than VSS? If so, what is the maximum allowed difference?The reason why I ask is because I would like to measure voltage slightly (0.2-0.3V) below the common ground attached to VSS. I looked in seve...

TDJ · 2024-04-04

After upgrading CubeProgrammer to new release 2.16 CLI commands started to fail during verification phase when changing option bytes on STM32U5A5. Sample command which fails:STM32_Programmer_CLI -c port=SWD mode=UR --hardRst -ob WRP1A_PSTRT=0xff WRP1...

TDJ · 2024-03-02

@Guillaume K, @Jocelyn RICARD Since my previous question on the same topic (see here) I have reviewed probably all the MCUboot/TF-M-based solutions available for ST MCUs. There are currently four options that I am aware of:TrustedFirmware-M (TF-M) us...

TDJ · 2024-02-26

According to RM0456, section 11.4 RCC clock functional description, p. 482:"The RCC feeds the Cortex system timer (SysTick) external clock with the AHB clock (HCLK) divided by eight, or LSE or LSI. The SysTick can work either with this clock or direc...

TDJ · 2024-06-30

Hi @STOne-32, would you care to comment?

TDJ · 2024-06-24

Cześć Jan, I drew this diagram myself. I only guess it is how DBCC works and I admit, this diagram can be completely incorrect. Some clarification from those who know for fact would be much welcomed.TJ

TDJ · 2024-06-23

Hi @STOne-32,Thank you. RM0456 states: "If dead battery behavior is not required, [DBCCx] pins must both be tied to ground". So, are you saying this is not exactly the case? Would you say this RM0456 topic should be revised?

TDJ · 2024-06-03

@AScha.3 Right, additional ~10-100nF capacitor added between ADC input and ground often sufficiently solves the problem. Another solution is adding "instrumentation amplifier" which allows for both gain and offset adjustment while bringing input impe...

TDJ · 2024-06-02

@AScha.3 There is one more factor which should be mention here for anyone who may come across this thread.The above solution can be used to reliably convert samples with 8bit precision only since R2 > 5.65k. To convert with 16b precision, measured vo...

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UCPD and DBCC (dead battery) doubts

Can VSSA voltage be slightly lower than VSS? (STM32H7, ADC)

CubeProgrammer 2.16 CLI problem - warning

Secure firmware updates from USB Stick on STM32U5 - how to? (2)

Cortex system timer config bug?

Re: UCPD and DBCC (dead battery) doubts

Re: UCPD and DBCC (dead battery) doubts

Re: UCPD and DBCC (dead battery) doubts

Re: Can VSSA voltage be slightly lower than VSS? (STM32H7, ADC)

Re: Can VSSA voltage be slightly lower than VSS? (STM32H7, ADC)