 DN 17 TSL2560/61 EVM Software Architecture
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This document describes the `Automatic Brightness Control Demo` application for the TSL2560/61 EVM. It is intented to provide an illustrative overview of the software architecture and to be a supplement to the `TSL2560/61 EVM User`s guide`. TAOS` software demonstrates an ambient light sensing method to automatically manage the display brightness of a notebook computer.
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TSL2560, TSL2561 LIGHT-TO-DIGITAL CONVERTER
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The TSL2560 and TSL2561 are light-to-digital converters that transform light intensity to a digital signal output capable of direct I2C (TSL2561) or SMBus (TSL2560) interface. Each device combines one broadband photodiode (visible plus infrared) and one infrared-responding photodiode on a single CMOS integrated circuit capable of providing a near-photopic response over an effective 20-bit dynamic range (16-bit resolution). Two integrating ADCs convert the photodiode currents to a digital output that represents the irradiance measured on each channel. This digital output can be input to a microprocessor where illuminance (ambient light level) in lux is derived using an empirical formula to approximate the human eye response. The TSL2560 device permits an SMB-Alert style interrupt, and the TSL2561 device supports a traditional level style interrupt that remains asserted until the firmware clears it.
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TSL2560/61 Quick Install Guide
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The TSL2560/61 EVM is no ordinary evaluation module. It simulates automatic brightness control using the computer display panel where it is installed. The TSL2560/61 precisely measures illuminance in diverse lighting conditions and features programmable gain and integration time as well as a user programmable interrupt function. The EVM connects to any notebook or desktop computer via a USB port in which the software interface provides control over the device feature set and demonstrates a complete ambient light sensing (ALS) implementation approximating the human eye response.
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TSL2560/61 User`s Manual
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The TSL2560/61 EVM is no ordinary evaluation module. It simulates automatic brightness control using the computer display panel where it is installed. The TSL2560/61 precisely measures illuminance in diverse lighting conditions and features programmable gain and integration time as well as a user programmable interrupt function. The EVM connects to any notebook or desktop computer via a USB port in which the software interface provides control over the device feature set and demonstrates a complete ambient light sensing (ALS) implementation approximating the human eye response.
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