TCS34083 datasheet(13/52 Pages) AMSCO

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Datasheet, Public

Page 13

[v2-00] 2023-Feb-01

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TCS3408 − 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 16 and Figure 17, the CRGBW color

sensing functions operate in parallel when enabled

(CONCURRENT_PROX_AND_ALS = 1). Each function is

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

time, persistence, thresholds, etc.).

If Sleep after Interrupt is enabled (SAI = 1 in register 0xAC), the

state machine will enter SLEEP when an interrupt occurs.

Entering SLEEP does not automatically change any of the

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).

Detailed Description

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