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AS7221

Smart Lighting Command Interface

Datasheet

• PUBLIC

DS000479

• v4-00 • 2019-Jun-28

│ 40

Command

Direction

Description

Format

Value Range

Default

ATI2CB

Starts a burst transfer

up to 10 bytes for

writing and reading. At

first the data will be

written and after then

read sequence will be

started

HEX

ATI2CB=<7-

bit_address>,<read_length>[,<write_data>

] - first two parameter can be hex or dez,

- <write_data> must be hex without

leading 0x, but is optional

examples:

ATI2CB=<7-

bit_address>,<read_length>[,<write_data>

]

- first two parameter can be hex or dez,

- <write_data> must be hex without

leading 0x, but is optional

examples:

ATI2CB=0x49,2: reads two byte from addr

0x49

ATI2CB=50,4,5BF3: writes 0x5B and

0xF3 to address 50 and read 4 bytes after

this

Calibration Management

ATDATA

Read all six raw

values: X, Y, Z, IR,

dark, clear

DEZ

<X, Y, Z, ir, d, c>

ATAMxy

R/W

Write 3x3 application

matrix to flash, x,y =

[0..2]

DEZ

1,0,0

0,1,0

0,0,1

ATNORMGAIN

R/W

Set/Get the gain which

the calibration values

were measured

DEZ

– 3

ATNORMINTT

R/W

Set/Get the integration

time which the

calibration values were

measured

DEZ

– 255

ATIRXS

R/W

Write IR scalar for

value X

DEZ

p2ram

value 0.0

ATIRYS

R/W

Write IR scalar for

value Y

DEZ

p2ram

value 0.0

ATIRZS

R/W

Write IR scalar for

value Z

DEZ

p2ram

value 0.0

ATPMxy

R/W

Write 3x3 color matrix

to flash, x,y = [0..2]

DEZ

p2ram

value

1,0,0

0,1,0

0,0,1

ATLXSL0

R/W

Reads and writes the

calibration scalar K0 for

external ambient light

sensor (TSL2572 only);

Formula:

LUX=K0*ADC0-

K1*ADC1

DEZ

≥0

0.2178

AS7221 Datasheet(PDF) 41 Page - ams-OSRAM AG

AS7221 Datasheet(HTML) 41 Page - ams-OSRAM AG

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