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How to exit ROM mode on BQ20x655-R1

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What is the proper way to exit ROM mode on this device?

I can enter ROM mode.  (enter 0x0F00 as a 2 word command on the SBS page)

I can then download the .senc file. (Flash Memory-> Read to File)

After that the part is unresponsive to other SBus commands.  All attempts to communicate get the error "SMB Write Command Error Error Code No Acknowledge: VB_T2H_NACK" 

I can re-write the DFI file to recover the device.  Does that overwrite calibration and other pack data such as cycle count and min/max voltages?


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