Data Sheet

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Part No. : LTR-559ALS-01

BNS-OD-FC002/A4

Optical Sensor

LTR-559ALS-01

ALS_DATA_CH1 Register (0x88 / 0x89) (Read Only)

The ALS_DATA registers should be read as a group, with the lower address read back first (i.e. read 0x88 first, then read

0x89). These two registers should also be read before reading channel-0 data (from registers 0x8A, 0x8B).

When the I

C read operation starts, all four ALS data registers are locked until the I

C read operation of register 0x8B is

completed. This will ensure that the data in the registers is from the same measurement even if an additional integration

cycle ends during the read operation. New measurement data is stored into temporary registers and the ALS_DATA

registers are updated as soon as there is no on-going I

C read operation.

The ALS ADC channel-1 data is expressed as a 16-bit data spread over two registers. The ALS_DATA_CH1_0 and

ALS_DATA_CH1_1 registers provide the lower and upper byte respectively.

Field

Address

Bits

Default

Type

Description

ALS Data Ch1 Low

0x88

7:0

00000000

ALS ADC channel 1 lower byte data

ALS Data Ch1 High

0x89

7:0

00000000

ALS ADC channel 1 upper byte data

0x88

ALS_DATA_CH1_0 (default = 0x00)

ALS Data Ch1 Low

0x89

ALS_DATA_CH1_1 (default = 0x00)

ALS Data Ch1 High