AS7221 datasheet(13/36 Pages) AMSCO

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ams Datasheet

Page 13

[v1-01] 2016-Dec-08

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AS7221 − Detailed Description

AS7221 Smart Lighting Manager - Overview

The Cognitive Light Engine (CLE) is the “brains” of the Smart

Lighting Manager. The CLE constantly processes information

from the calibrated XYZ chromatic white/color sensor, network

access and inputs while controlling outputs. AS7221 initial

setup and ongoing parameter storage is automatically done by

software within the required external serial flash memory, via

SPI bus.

A luminaire solution for chromatic white/color maintenance

with lumen maintenance requires only the AS7221. A luminaire

solution with chromatic white color/maintenance, lumen

maintenance and daylighting requires just the addition of an

ams TSL4531 single chip ambient light sensor, connected via

I²C. Refer to the table in the Figure below.

Overall AS7221 timing generation uses an on chip 16MHz

temperature compensated oscillator for master clock timing.

Refer to the separate AS7221 User Guide as well as the ams

Smart Lighting Command Set document for additional usage

and setup information.

Figure 15:

AS7221 Solution Chart

Solution Required

Device Orientation

(from luminaire light source)

Chromatic Color

Maintenance

Lumen

Maintenance

Daylighting

AS7221

TSL4531

(optional)

√√

↑

(into luminaire)

(not required)

√√

√

↑

(into luminaire)

↓

(into room)

Detailed Description

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