TCS3701 datasheet(15/67 Pages) OSRAM

15 / 67 page

Page 14

Datasheet, Public

Document Feedback

[v2-00] 2022-Dec-15

TCS3701 − 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

(PEN | AEN = 1) the device exits the IDLE state. If all functions

are disabled (PEN = 0 & AEN = 0), the device returns to the IDLE

state.

As depicted in Figure 18 and Figure 19, the proximity and

CRGBW color sensing functions operate in parallel when

enabled (CONCURRENT_PROX_AND_ALS = 1). In addition,

when proximity calibration is requested, it will temporarily

disable the proximity function. 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

TCS3701 Datasheet(PDF) 15 Page - OSRAM GmbH