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An Evaluation System for the TSL2560/61 Ambient Light Sensor
D
U
EVICE
TILITY
Software Description
To start the Device Utility application, click:
Start -> Programs -> TSL2560 USB EVM -> Device Utility
The Device Utility program is included as a part of the EVM and is a separate application which
exposes key registers and control functions described in the TSL2560/61 datasheet. This utility
provides a knowledge of the low-level functionality of the TSL2560/61 device.
Figure 5. TAOS TSL2560/61 Device Utility Dialog
Graphical User Interface (GUI)
The Main dialog of the Device Utility application displays the illuminance (lux), raw channel values,
and relative position of the channel 0 value. The raw values are read from the ADC Channel Data
Registers (Ch-Fh) described in the TSL2560/61 datasheet.
Since the TSL2560 has interrupt
capability, the upper and lower interrupt threshold values are also displayed along with the relative
position of the channel 0 value. Channel 0 is used to trigger an interrupt based upon a relative
change in ambient light.
When channel 0 crosses either the upper or lower threshold, the Interrupt indicator will turn "red."
The interrupt will continue to be visible until it is reset using the adjacent 'Clear' button.
The Main dialog also includes an 'Option' menu item which allows the user to select which package
type (TMB or chipscale) is being evaluated and whether to turn on/off the LEDs on the EVM. When
deriving lux, the lux equation is similar for both TMB and chipscale packages, but two distinct
equations are provided to optimize the illuminance value for the different package types. The LED(s)
on/off item is provided to eliminate the interference of the LED reflections at low light levels when the
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