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Interface code implementation for the MAX9635 ambient light sensor

Posted: 14 Sep 2010     Print Version  Bookmark and Share

Keywords:interface code  light sensor  MAX9635 code implementation 

This application note describes the proper use of interrupt output functionality in the MAX9635 ambient light sensor for LCD backlight management in portable devices like smart phones and tablets. The interrupt functionality allows adjustment of light threshold values for multiple illumination zones without the need to poll the light sensor repeatedly. When used properly, this function allows the system to remain in a low-power sleep mode or to dedicate other resources for other user-defined tasks. The interrupt functionality significantly improves energy efficiency, system performance, and the user's experience in different lighting conditions. This article also gives an example of I2C C pseudocode for programming the interrupt.

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