Data Sheet

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Part No. : LTR-559ALS-01
BNS-OD-FC002/A4
Optical Sensor
LTR-559ALS-01
ALS_CONTR Register (0x80)
The ALS_CONTR register controls the ALS Gain setting, ALS operation modes and software (SW) reset for the sensor.
The ALS sensor can be set to either standby mode or active mode. At either of these modes, the I
2
C circuitry is always
active. The default mode after power up is standby mode. During standby mode, there is no ALS measurement performed
but I
2
C communication is allowed to enable read/write to all the registers.
Field
Bits
Default
Type
Description
Reserved
7:5
000
--
--
MUST write to 000 (default)
ALS Gain
4:2
000
RW
000
Gain 1X  1 lux to 64k lux (default)
001
Gain 2X  0.5 lux to 32k lux
010
Gain 4X  0.25 lux to 16k lux
011
Gain 8X  0.125 lux to 8k lux
100
Reserved
101
Reserved
110
Gain 48X  0.02 lux to 1.3k lux
111
Gain 96X  0.01 lux to 600 lux
SW reset
1
0
RW
0
Initial start-up procedure is NOT started (default)
1
Initial start-up procedure is started, bit has default
value of 0 after start-up
ALS mode
0
0
RW
0
Stand-by mode (default)
1
Active mode
0x80
ALS_CONTR (default = 0x00)
B7
B6
B5
B4
B3
B2
B1
B0
Reserved
ALS Gain
SW Reset
ALS Mode