Part Number:MSP430G2744
Hello!
We have sensor that controlled by MSP430G2744. It connected to our microcontroller Nordic nRF52832 via UART via next 2 IOs: P3.5/UCA0RXD/UCA0SOMI & P3.4/UCA0TXD/UCA0SIMO.
We see that P3.4/UCA0TXD/UCA0SIMO is constantly damaged during time. If we doing constantly on/off to power of the board this port can get damaged very fast. We asked the question at nordic forum -and they
think that maybe a Nordic get phantom powered by MSP430G2744 via IO that connected to it.
We tried to isolate the IOs between nRF and MSP - with buffers and/or series resistors/LPFs, diodes but they only made longer the period that device worked. If before the device worked one day, after different fixes it could hold up with constant power on/off switches about 2 weeks. But at the end it get damaged.
Can you help us to protect the MSP IOs so it will no damaged?
Thank you