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Datasheet, Public

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[v2-00] 2022-Dec-05

TSL2540 − Detailed Description

Figure 12:

Detailed State Diagram

Note(s):

1. An I²C write to az-nth-iteration register, except of the value 00h (disable-az), resets az-done independent of actual cntrl-state.

In consequence, a new autozero calibration will be started in advance to the next ALS integration cycle.

aen

Run ALS

Integration

Run Autozero

Calibration

no

Oscillator On

(IDLE)

Oscillator Off

(SLEEP)

pon

no

yes

az-done

yes

az-done = 1

wen

aen==1 &&

az-done==0

yes

az-done = 1

yes

no

Run Autozero

Calibration

Run WTIME timer

no

yes

wtime-done = 0

wtime-done = 1

autozero calibration is

executed in parallel to

running WTIME timer

Note 1: an I2C Write to az-nth-iteration register, except of the value 00h(disable-

az), resets az-done independent of actual cntrl-state. In consequence, a new

autozero calibration will be started in advance to the next ALS integration cycle.

az-done = 0 (reset)

az-done = 0, if az-nth

iterations passed since

last AZ calibration.

(refer to note 1

for exceptions)

no

az-done &

wtime-done

TSL2540 Operational States