The latest articles on Forem by Sasmit Joshi (@sasmitjoshi5). https://forem.com/sasmitjoshi5 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3594117%2F4b3be072-ecf1-4edf-8cb4-3a5bb24b8c3c.png https://forem.com/sasmitjoshi5 en Sasmit Joshi Mon, 03 Nov 2025 13:07:47 +0000 https://forem.com/sasmitjoshi5/clarification-on-clock-source-selection-for-stm32u575cgu3-in-can-j1939-canopen-application-31p3 https://forem.com/sasmitjoshi5/clarification-on-clock-source-selection-for-stm32u575cgu3-in-can-j1939-canopen-application-31p3 <p>Dear STM32 Community,<br> I am currently working on a project that uses the STM32U575CGU3 microcontroller. The goal of the project is to display pressure and temperature values over CAN J1939 and CANopen communication protocols in a digital output format.<br> For sensor data acquisition, I am using an external two-channel ADC to measure pressure and temperature values.<br> Regarding the system clock, I have tested the application using both the internal clock source and an external crystal oscillator. The system performs well in both configurations.<br> However, I would like to request your expert guidance on the recommended clock source for this application. Specifically:</p> <p>Is it advisable to use the external crystal for better timing accuracy and long-term stability?<br> Or is the internal clock sufficiently reliable for CAN J1939 and CANopen communication in a production environment?</p> performance help iot discuss