TCS3530 datasheet(16/106 Pages) OSRAM

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[v3-00] 2023-Jun-23

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TCS3530 − Detailed Description

Upon power-up, POR, the device initializes. During initialization

(typically 200μs), the device will deterministically send NAK on

I²C and cannot accept I²C transactions. All communication with

the device must be delayed, and all outputs from the device

must be ignored including interrupts. After initialization, the

device enters the SLEEP state. In this operational state the

internal oscillator and other circuitry are not active, resulting in

ultra-low power consumption. If an I²C transaction occurs

during this state, the I²C core wakes up temporarily to service

the communication. Once the Power ON bit, PON, is enabled,

the device enters the IDLE state in which the internal oscillator

and attendant circuitry are active, but power consumption

remains low. Whenever a function is enabled (AEN = 1), the

device exits the IDLE state. If all functions are disabled (AEN =

0), the device returns to the IDLE state.

As depicted in Figure 18 and Figure 19, the color sensing

functions operate in parallel when enabled. Each function is

individually configured (e.g. gain, ADC integration time, wait

time, persistence, thresholds, etc.).

If Sleep after Interrupt is enabled the state machine will enter

SLEEP when an interrupt occurs. Entering SLEEP does not

automatically change any of the register settings (e.g. PON bit

is still high, but the normal operational state is over-ridden by

SLEEP state). SLEEP state is terminated when the SAI_ACTIVE

bit is cleared (the status bit is in register 0xA7 and the clear

status bit is in register 0xFA).

State Machine Diagrams

Figure 18:

Simplified State Diagram

Detailed Description

AEN

IDLE

ALS/

COLOR/WIDEBAND/

FLICKER

SLEEP

PON

TCS3530 Datasheet(PDF) 16 Page - OSRAM GmbH

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