TCS37073 datasheet(25/70 Pages) OSRAM

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Page 24

ams Datasheet, Confidential

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[v1-05] 2019-May-13

TCS3707 − Register O ver view

ALS Configuration

The ALS/color integration time is set using the ATIME field and

ASTEP field (ASTEP register). The ALS integration time, in

milliseconds, is equal to (ATIME + 1)

× (ASTEP + 1) / 360. The

reset value for ASTEP is 999 (2.78ms), and the recommended

configuration for these two fields is ASTEP = 599 and ATIME =

29, which results in an integration time of 50ms. The ALS

integration time also establishes the full scale ADC range, which

is equal to (ATIME + 1)

× (ASTEP + 1).

If wait is enabled (WEN = 1), each new ALS sample is started

based on WTIME. It is necessary for WTIME to be sufficiently

large for ALS integration and any other functions to be

completed within the time frame. The device will warn the user

if the timing is configured incorrectly. If WTIME is too short, then

ALS_TRIGGER_ERROR will be 1.

Figure 26:

ATIME

Note(s):

1. Return to the Register Map (0x81).

Addr: 0x81

ATIME

Bit

Field

Reset

Type

Description

7:0

ATIME

0x00

R/W

ALS Integration Time. Sets the number of ALS/color

integration steps from 1 to 256.

VALUE

INTEGRATION TIME

0ASTEP

nASTEP

× (n+1)

255

256

× ASTEP

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