Others: hardware and software

Hello, Often I need documentation of different components like datasheets.I usually use Google and end up on any datasheet website. In some cases, mainly searching old components, I found datasheets of bad quality, that seems bad photocopies.Has ST any public website where can download it's datasheets? Thanks 

Hi Team,We have used LED1202 in our board where one LED driver is connected to Microprocessor and one LED driver is connected to MCU.We are seeing random LED channel damages (with LED driver which is connected to MCU) while device is in running state, and LED channel damage issue is random that any or all channels get damage which are connected to LEDs only. LED turns ON permanent which channel got damaged.We had debugged the operating voltage fluctuations, ground bounce effects but nothing happens during the LED channel failure.We have limited LED channel current to 6mA and using LED function as ON and OFF only. No PWM functionality os being used here.Could you please let us know what can be the root cause here behind LED channel damage?Thank you

Hi everyone,We're using the M95P32 page EEPROM and have encountered an issue where some devices stop responding after a period of normal operation. Initially, they function as expected, but after some time, communication fails.Specifically, after power-up, the first command we send is the JEDEC ID request. In the failing devices, this command consistently returns all zeros. We've also attempted to read the configuration and safety registers, but those return zeros as well. A software reset before sending the JEDEC command has no effect.This is an example of a failing JEDEC ID request (blue is MOSI, green is MISO and purple is CS)Interestingly, we discovered by chance that performing a quick power cycle—shutting down and immediately powering back up without allowing Vcc to fully drop to 0V—restores normal operation.This is an example of successful power up, you can see how the EEPROM responds in the green line.However, if Vcc is allowed to fully discharge before powering up again, the d

Im trying to download STSW-eDSim from the https://www.st.com/en/embedded-software/stsw-edsim.html but the download doesnt start. I have logged into my account, accepted the terms and conditions but still the download doesnt starts.  Thank you in advance, please provide me the exe file for STSW-eDSim software.

Hi, everyone  This TDA2030A amplifier module use dual power supply ±12 Voltage See attached image file  Thanks  

Hi everyone,I'm experiencing a persistent and perplexing issue with UART communication on my STM32F103C8T6 (Blue Pill) board. I'm trying to communicate with an energy meter using the IEC 61107 standard, which requires 300 bps with 7 data bits, Even parity, and 1 stop bit (7E1) during the initial handshake.While my setup works flawlessly at higher baud rates (e.g., 600 bps, 9600 bps) with other configurations, I consistently encounter data corruption (receiving garbage characters or no response) specifically at 300 bps, 7E1.Here's a detailed breakdown of my setup, troubleshooting steps, and observations:1. Hardware SetupMCU: STM32F103C8T6 (Blue Pill board)Development Environment: Arduino IDE (with STM32Duino core, latest version)UART Peripheral Used: USART2 (PA2/PA3) for communication with the energy meter.External Interface: MAX485 module (for RS485 conversion) connected to an optical probe for the energy meter. (Note: The problem persists even when bypassing the MAX485 and connecting

Hello What is this?Where can I find it?What is the replacement ?

Hello,I have a damaged chip and I cannot read the type.Maybe someone knows the productnumber of it. Thank you very much and have a nice day! 

I would need X-CUBE-STL for one of our project. The official website denotes a NDA to be signed for the package download. It would be helpful, if we could get the point of contact for the NDA procedure.

Hi  ,  I want to ask a question about HFDA801A's AIDA Application GUI how to add xml file?as below  the user manual show a  path like the picture , but I can't find it   this is my aida app as below BRAaron

Hi,I need the spice model for thyristor surge protector device TPN3021RL to simulate a circuit. However I could not find it, could you provide the model?

Hi,I am a team of two, trying to understand this custom SPI communication:The Communication is basically a variant of SPI with CPOL=1, CPHA=1. There is no framing or CS signal, which complicates parsing, and there is an additional variable length ACK clock pulse driven by the MISO (kind of like I²C clock stretching).Default clock period is 13µs (6.5µs per half cycle) = 77 kHz (80 kHz). This decreases to 2µs for newer Slaves devices (1µs per half cycle) = 500 kHz Intended duty cycle seems to be 50% (fast mode seems to be 0.8µs low / 1.2µs high, but this is likely just an analogy effect).Power-on timing:• 1µs low glitch on MOSI (?)• 42µs delay (?)• Single 6.5µs low pulse on MOSI (does this serve a purpose?)• 103µs delayCommand byte timing:• Master drives MOSI at a random value for ~18µs (slow mode) or ~4µs (fast mode)• This seems to usually be whatever the last bit of the previous command was, but not always consistent.• Each bit is driven (by both master and slave) on the falling edge o

I’m after some recommendations for a communication protocol between two stm32’s. One will be on a BMS board controlling a battery monitor IC and reading a fuel gauge and another will be on a seperate board with a charger and a power supply. The communication will mainly be the BMS stm32 sending battery statistics to the other board but there could be some two way communication. My plan is to make the BMS board standalone so it may not always be communicating with another stm32. I was originally thinking just UART but a quick google shows that CAN or SMBus may also be popular. I’m not sure of the advantages or disadvantages of going with different protocols. I haven’t used CAN or SMBus before but I could definitely look into it if that’s a better way to go. There might also be a possibility in the future for me to stack multiple BMS boards together to get more power output if that sways the decision on the communication protocol. 

What does the 'High' optimization  actually do in IAR Embedded Workbench 9.60.3 when the 'Size' option is selected, but no additional optimization checkboxes are enabled. Even without selecting any extra options(like CSE, loop unrolling, etc. ), the code size reduces significantly—up to 30%. How is the  IAR Embedded Workbench 9.60.3 achieving this reduction, and what specific optimizations are being performed in this case.

 I'm using E Design Suite to build a buck (step-down) converter circuit and would like to know if there's anything in the design that I should be concerned about. I've reviewed the schematics in the datasheets, and they seem to be about the same.I plan to use the same MOSFET model for both the high-side and low-side switches to simplify component sourcing. Could this be a problem?I intend to use this circuit to power several servos, so the output should provide at least 10 A. Should I add more capacitors at the output? Would it also be a good idea to include flyback diodes?The link to the simulation: link

I found that the TDA7786 provides a datasheet, but based on others' code, it seems to lack a lot of content. Are there any similar technical reference documents or application manuals? I feel like I can't write the driver based solely on the datasheet.

Parts#:M24128-BFDW6TP  How do you know the wafer origin of the part based on the trace code? Thanks! [Moderation edit: pictures removed to avoid misuse]

Dear All,I have dev a custom  pcb based on stm32h743ii series with the following Spec:Flash :  25Q256JVENSDRAM: W9825G6KH-6lcd wiki 7 inches resolution 1024 x 600What i have configure  ltdc on sdram at adress 0xC0000000 is ok .Now is the configuration of the flash do i have to make 2 partitions on the flash on cube mx config to use lvgl and dma.( i need a general buffer for sensor data).or make just one and make a bootloader  with memory mapped mode i really lost.I have download lvgl source file is 20Mo so it's 184 Mégabits it will left me just 72Mégabits for fonts and images.if some one be kind to give me the best config and some advise to light lvgl that would be cool  

Hello ST community has any one an idea what this ST chip is as shown in the picture?I haven't found any datasheet of this device.

Hello, I'm testing HMAC authorizations following TPM 2.0 library specification, and I've confirmed all cases works well except the "unbound and unsalted" session case, which uses null buffer as sessionKey with authValue_entity for HMAC calculation.​I’ve double-checked the code logic and found no errors in the HMAC calculation for the authorization area. Yet only the ‘unbound and unsalted’ session—which uses the uninitialized sessionKey (null buffer) and the provided authValue—still causes an error.​Therefore, I wonder whether TPM module blocks unbound and unsalted HMAC sessions.Is there any documentation related to HMAC authorization? If so, could you send me any relevant documentation?​Best regards,S Kim

Hi everyone!I’m completely new to microcontrollers and planning to start a simple project, maybe something like a motion sensor for my garage or home. I’ve been looking into ESP32 but I’m not sure. Do you have another option you'd suggest?I’d like something that’s easy to learn, has lots of tutorials online, and maybe has Wi-Fi or Bluetooth so I can expand the project later on.Thanks!

Split from interfacing bosch bme688 sensor with Stm32.Hi,Does Bosch's BSEC library officially support the Cortex-M0+ platform (such as the STM32G0 )?I attempted to integrate the library, but the API calls seem to get stuck during execution. Kindly confirm whether Cortex-M0+ is officially supported by the BSEC library.Thank you.Fkumar 

Hi,I am creating my own PCB based on the Nucleo144pin board. From what I understand, the USBLC6-2SC6 is meant to be an ESD protection IC. The USBLC6-2 datasheet recommends that the input is not connected to the output. However, the inputs from the USB connector is shorted to the output of the USBLC6-2SC6 in the Nucleo144pin board. Is there an intended function for this or is it an error?

After a lot of searching i couldn't find this ST part number. Can anyone identify this part?  Is there a way to methodically find pert numbers from ST? Thanks in advace. 

Hi, everyone What does the letter MAR printed on the STmicroelectronics TDA7294 IC mean?See attached image fileThanksTDA7294CZ7S8428V6 CZ MAR