MPU9250, stuck the I2C bus

By jsesq , 21 June 2016

Hi,

I'm using the MPU9250 with msp430.
Sometimes (during debugging and power on/off) the MPU9250 hold the SCL line down and don't release it.
Studying the datasheet I found that nCS pin for I2C operation is connected to VDD (Figure 2 [a]).

I have two questions:
1. Regarding the nCS pin: should it be connected to VDD or I can keep it floating for i2c operation?
2. Is there any legal way to "reset" the MPU9250 (or to recover the I2C module) without re-powering it?

Regards,
John.

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