About AScha.3

AScha.3 · 2024-09-04

Hi,i just tried to see the reaction on some events on a system with H7A3 cpu and was surprised:EXTI response time was 50 us ! This is a lot for a ARM cpu running at 200MHz - too much, i would say.ED: wrong timings measured, my error : pins have cer....

AScha.3 · 2024-07-24

Hi,in ds for STM32H747xI/G , DS12930 Rev 2 , for Temp.sensor CAL2 : 130° (Parameter) is written here: BUT max. temp for chip is 125° :So i assume, this is misspelled , because in all other : (H743, H750, H7A3 ..) 110° + 30° are given.NOT 130° .

AScha.3 · 2024-04-30

Hi,is there a limit to max 5 PM messages or whats wrong here ?After 4 PM a limit is here ? Never write again ? or?and then comes HERE :Perfect !

AScha.3 · 2024-02-27

Hi,We have now a problem with some boards, H7A3ZI or H743ZI , when switching off : RTC stops working !RTC is powered on VBAT with a standard CR2032 and was working as it should on about 500 boards since more than a year. Now (some) batteries loosin...

AScha.3 · 2024-02-11

Hi,Just yesterday on my H743VIT6 (rev. V ) on the running TFT : picture faded away...white screen.I just happened to look at the display , thinking ...ok, maybe one of the thin wires just broke now...TFT (small, 1,8" , ST7735 on 3,3V) connected /sold...

AScha.3 · 2024-11-21

Hi,1. to check the internal clock on mco : try a DSO , to see what the clock doing. (LA is no good idea, because its sampling /compressing the signal, so you never know for sure.)2. Try a PLL setting with DIVM1 2 and DIVN1 240 ; (giving same 480M , ...

AScha.3 · 2024-11-18

You give not much info about : what you use, what you tried, what you did successful ...so: what programmer you use ? which st-link ? did you read the "first steps" etc from Riverdi ?

AScha.3 · 2024-11-17

>Below shows having 3 of16-bit ADCs - Are they independent?yes.> Are they independent? Or only 2 direct channels independent?yes, independent . see AN5354 :You should read yourself, see rm :So 1+2 can work in dual mode...but also separate.

AScha.3 · 2024-11-17

1. look in ds. + yes, see cpu selection tool.2. yes3. see in ds . The analog mux makes some channels a little bit faster - or slower.4. just check from the boards avail.

AScha.3 · 2024-11-15

Hi,did you check: setting drive level high -> look in (debug, sfr ) whats real setting in rcc lsedrive (in rcc_bdcr).(iirr Cube set wrong bits for drive level, but i dont remember cube version and cpu type. So just check..to be sure.)

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EXTI response time / INT response time on H7 or H5 -- STM cpus

Wrong reference temperature given in ds H747

PM - limit 5 msg ??

Problem with RTC when switching off (VDD) on H7

H743VI - pin dies away -- reliability problem of chip ?

Re: STM32H750I USART1 Baudrate differs under cold temperature

Re: Riverdi RVT70HSSNWC00-B Problems

Re: Question about SAR ADC in STM32H753

Re: Question about SAR ADC in STM32H753

Re: RTC Oscillator not stable