We just brought up a 20 boards for a prototype. We are measuring gravity on the z direction.
On the boards that seem to work properly, we measure 1g with the chip facing up, -1g when the chip is facing down.
On the boards that are not behaving:
Chip facing up: 0.86g
Chip facing down: -1.16g
Do you know of anything that would cause this? I am wondering if this is a hardware or software problem based on others who have already experienced this? If hardware, was there external passive components (capacitors) that caused this?
Thanks,
Rob