In SX Microcontrollers, SX/B Compiler and SX-Key Tool, phipi wrote:

3) Be sure, when the sensor is disabled via the SX not powering it, that all other SX pins connected to it are either low or tri-stated. This is particularly important if you were to depower the device by pulling the power pin low instead of tri-stating it. Failing this, you could cause a dead short through the sensor's protections diodes, which would likely destroy them and possibly the sensor as well. In any event, it would be safer to disable the sensor by tri-stating the power pin, rather than pulling it low.

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