We just received our MPU-9250EVB board, and I noticed the U2 footprint for the AK8963C magnetometer is populated. I thought the MPU-9250 had the AK8963 magnetometer built into it, already hanging right off the AUX I2C bus?
I just noticed that R12 and R14 which connect it to the AUX I2C bus are supposed to be "open" on the board. I'll have to check it with my magnifiers. It seems that it's connected to the main I2C bus, so it can be addressed if necessary. But why have it on there at all, given that this board is made with the 9250?
And furthermore, the #CS line of the outboard AK8963C is permanently pulled high directly to VCCIO, disabling the chip. How would this ever do anything?
Regards,
John