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AS7221

Smart Lighting Command Interface

Datasheet

• PUBLIC

DS000479

• v4-00 • 2019-Jun-28

│ 35

Command

Direction

Description

Format

Value Range

Default

ATXYZC

Read calibrated X, Y,

and Z data

DEZ

<XXX.X, YYY.Y, ZZZ.Z>

ATSMALLXYC

Read calibrated x and

y for CIE 1931 color

gamut

DEZ

<xxxxx.xxxx, yyyyy.yyyy>

ATUVPRIMEC

Read calibrated u’, v’

and u, v for CIE 1976

color gamut

DEZ

<u'u'u'u'u'.u'u'u'u',v'v'v'v'v'.v'v'v'v',

uuuuu.uuuu,vvvvv.vvvv>

Daylight Harvesting / Illumination Control

ATDL

R/W

Enables/disables

daylight harvesting

DEZ

1: ON, 0: OFF

ATLUXT

R/W

Set illumination target

LUX value

DEZ

– 64000

400

ATLUXS

R/W

Switch between lux

values from internal

sensor and external

ambient light sensor

DEZ

0: Auto detect (higher priority is external

sensor)

1: Internal sensor

2: External ambient light sensor

ATLUXC

Read the illumination of

the internal sensor in

lux

DEZ

– 64000

65535

– LUX value is in saturation

ATDMLTL

R/W

Configures the low-end

DIM output to support

also dimmers without

full range dimming (e.g.

10%-100%)

DEZ

– 50

DIM Input Pin and Mapping

ATDE

R/W

Enable/disable DIM pin

DEZ

1: ON, 0: OFF

ATDMD

R/W

Set DIM pin mode.

Only used if ATDE

enabled!

DEZ

0: DIM mode

Range from 0% to 100%, direct regulation

of the brightness of the PWM outputs

1: LUX mode

Range from 0% to 100%, direct regulation

of the illumination [LUX]. Ranges can be

set via ATDMINLUX and ATDMAXLUX.

Overwrites the ATLUXT command

ATDMIN

R/W

ATDMIN sets low end

of DIM pin, using an

integer percentage of

10V. For example

ATDMIN=20 sets the

lower DIM pin range to

2.0 V (10V x 20%) for

0% brightness.

DEZ

0: ATDMAX

ATDMAX

R/W

ATDMAX sets high end

of DIM pin, using an

integer percentage of

10 V. For example

ATDMAX=80 sets the

higher DIM pin range to

8.0 V (10V x 80%) for

100% brightness.

DEZ

ATDMIN

– 100

100

ATDMINLUX

R/W

Set the current min

LUX target value for

the DIM pin range.

DEZ

0: ATDMAXLUX

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