FIM UART 5V Tolerant

From NS9215 Hardware Reference I know that all I/O are 5V tolerant. Is this true for FIM UART interface on CC 9P 9215 module?

I am asking because in my setup 9215 module restarts after some time (30 minutes) when I have serial devices connected to FIM UARTs.

The same module works without problems if serial devices are connected to ports 0 - 3.

Thanks you,

If you are using CC 9P 9215 then u shud refer to
page 111. I guess you can give 3.3V…

Also have you gone through the configuration settings mentioned in


Go through Hardware reference manuals for proper config…

Is this a NET+OS/Linux/PnP firmware?