This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: MSP432P4111
Hi,
We have bought some units of MSP432P4111IPZR (TQFP-100) for our design. We have designed a 4-layer board for use with TI MSP432.
I followed the datasheet specs, but unfortunately, some seconds after the power-up the voltage across 3.3V rail drops and the IC finally dies. We've tested three units using the same board layout and we've got the same behavior. Then, we designed a simple single layer board with just the MCU and the minimal passive components to get it working, but we observed the same behavior.
The schematic sheet is depicted bellow
I've used a thermal camera and realized that there is an abnormal behavior between supply pins 72/73 (DVSS2/DVCC2).
Note: I was able to flash and debug the microcontroller using a basic code (blink LED), in the first moments afterwards the power-up. I do not know what is going on. Is it possible a defective lot of this IC? The lot number can be seen on the package
I appreciate some kind of help.
Thanks,
Otavio Augusto
Thank you for the post and the detailed information. Typically, we would request the units be returned for failure analysis. I will need to investigate the proper course of action.
To your original question I am not aware of any recall or announcement of defective material.
Do you have the target socket board to test additional silicon before attempting assembly?
http://www.ti.com/tool/msp-ts432pz100
Regards,
Chris
Hi Chris,
I can check with my project manager the possibility to return some units. We bought 5 units. Four are fully destroyed, and the last one was not used yet. I really don't know what to do. At least, does the schematics seems correct?
Asking your question, I do not have the msp-ts432pz100
Regards,
Otavio
Hi Chris,
To get a reliable waveform of the supply, would be necessary making a new board with a new IC.
After a few seconds
I've supplied the IC with the 3.3V from the MSP432 Launchpad Evaluation Kit, the same which I have been using to develop the application code.
I had never seen anything like it before.
You have requested my Address and Phone number. Can I send to you in a private message?
Regards,
Otavio Augusto
**Attention** This is a public forum