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AS7221

Smart Lighting Command Interface

Datasheet

• PUBLIC

DS000479

• v4-00 • 2019-Jun-28

│ 36

Command

Direction

Description

Format

Value Range

Default

ATDMAXLUX

R/W

Set the current max

LUX target value for

the DIM pin range.

DEZ

ATDMINLUX

– 64000

64000

ATPCTLUX

R/W

Set the lux target value

in percentage between

ATDMINLUX and

ATDMAXLUX

DEZ

– 100, can read back also 101, which

means that the internal set target value is

out of range

ATDVAL

Reads the current

analog value of the

DIM pin in digits

DEZ

– 1023

AUX Input Pin and Mapping

ATXE

R/W

Set AUX input function

enable. When set to 0,

all ATXMD operations

are held in default

mode.

DEZ

1: ON, 0: OFF

ATXMD

R/W

Set AUX pin mode.

When ATXE=0, all

ATXMD operations are

disabled.

DEZ

0: AUX mode

This is for AUX pin usage as a 0

– 3 V

input that can scale the DIM pin input.

1: OCC mode

This is for the AUX pin to act as a digital

occupancy input (50% threshold) for the

OCC timer. 1 = Occupancy, 0 = No

occupancy. See also ATOCCT

2: CT_TUNE mode

This is for AUX pin usage as CCT target.

Overwrites the ATCCTT command

3: CT_SEL mode

Selected CCT target values, configured in

300 mV step width

ATXMIN

R/W

Sets lower end of 0-3 V

AUX pin, using an

integer percentage of

3 V. For example if

ATXMIN=25 sets an

AUX pin range from

0.75 V (25% x 3v) to

3 V for 0-100% scaling.

DEZ

0: ATXMAX

ATXMAX

R/W

Sets higher end of 0-

3 V AUX pin, using an

integer percentage of

3 V. For example if

ATXMAX=75 sets an

AUX pin range to

2.25 V (25% x 3v) to

3 V for 0-100% scaling.

DEZ

ATXMIN

– 100

100

ATXMINCCT

R/W

Sets min CCT for

minimum AUX value in

K in AUX CCT_TUNE

mode

DEZ

400

– ATXMAXCCT

400

ATXMAXCCT

R/W

Sets max CCTT for

AUX pin=3 V in K in

AUX CCT_TUNE mode

DEZ

ATXMINCCT

– 15000

15000

ATXVAL

Reads the current

analog value of the

AUX pin in digits

DEZ

– 1023

ATOCCT

R/W

Set Occupancy timeout

value for ATXMD = 1

DEZ

– 10 [minutes]

AS7221 Datasheet(PDF) 37 Page - ams-OSRAM AG

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