Other Parts Discussed in Thread: MSP-EXP430F5529LP,
Hello all, I'm having some strange powering issues with MSP-EXP430F5529LP board.
What I was trying to do is to have one external 3.3V power source that alimentates MSP430F5529, from 3.3V and GND pins; but at the same time I wanted the UART 1 to be available.
So I removed the alimentation jumpers in the isolation block (3.3V and 5V). The weird thing is that in this condition, without the external power source, but just the USB cable, I still notice some voltage on 5V and 3.3V pins. I tried removing jumpers one by one and I realized that was the RX jumper that was alimentating those pins. Without it the voltage was 0, as expected.
Someone could explain me why and how do I fix it?