Information

1300 Henley Court

Pullman, WA 99163

509.334.6306

www.digilentinc.com

PmodALS™ Reference Manual

Revised April 15, 2016

This manual applies to the PmodALS rev. A

DOC#: 502-286

Other product and company names mentioned may be trademarks of their respective owners.

Page 1 of 2

Overview

The Digilent PmodALS demonstrates light-to-digital sensing through a single ambient light sensor. Digilent

engineers designed this Pmod™ around the Texas Instruments® ADC081S021 analog-to-digital converter

and Vishay® Semiconductor's TEMT6000X01.

1 Functional Description

The PmodALS utilizes a single ambient light sensor (ALS) for user input. The amount of light the ALS is exposed to

determines the voltage level passed into the ADC, which converts it to 8-bits of data. A value of 0 indicates a low

light level and a value of 255 indicates a high light level.

The PmodALS

 Simple ambient light sensor

 Convert light to digital date with 8-bit

resolution

 Small PCB size for flexible designs 0.8 in ×

0.8 in (2.0 cm × 2.0 cm)

 6-pin Pmod port with SPI interface

 Follows Digilent Pmod Interface

Specification Type 2

 Example code available in resource center

Features include:

PAGE 1
300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com PmodALS™ Reference Manual Revised April 15, 2016 This manual applies to the PmodALS rev. A Overview The Digilent PmodALS demonstrates light-to-digital sensing through a single ambient light sensor. Digilent engineers designed this Pmod™ around the Texas Instruments® ADC081S021 analog-to-digital converter and Vishay® Semiconductor's TEMT6000X01.
PAGE 2
PmodALS™ Reference Manual 2 Interfacing with the Pmod The PmodALS communicates with the host board via the SPI protocol. Since the on-board analog-to-digital converter is a read-only module, the only wires in the SPI protocol that are required are the Chip Select, Master-InSlave-Out, and Serial Clock lines. The location of each of these lines on the Pmod header are shown in the table below. 2.