TMD3721 datasheet(16/89 Pages) AMSCO

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Datasheet, Public

Page 15

[v3-00] 2023-May-26

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TMD3721 − Detailed Description

Figure 15:

ALS Integration and Data Sampling in TMD3721

Operational State Diagram

Figure 16:

Operational State Diagram

Note(s):

1. ALS active time =32.568μs + ALS integration time (ATIME).

2. Proximity active time = PPULSE x(2 x(PPULSE_LEN +42.15μs)) +78.75μs

3. All numbers in the above equations are typical values

ATIME

ASD

ASP1

ASP2

ASP1

ASP2

ASP1

ASP2

ASP1

ASP2

ALS_Init_Time

Start s hifts

AVSYNC_EN=0

Start s hifts

AVSYNC_EN=0

PON=1

AEN=1

AWEN=1

AVSYNC=1

VSYNC

SLEEP

(PON=0)

IDLE

(PON=1)

ALS

ACTIVE

(1)

Proximity

ACTIVE

(2)

Update

ADATA

SAI

(if enabled)

AWTIME

(if enabled)

Complete

PTIME

PROX_DATA_AVG

(if enabled)

Update

PDATA

SAI

(if enabled)

PWTIME

(if enabled)

POR

(TActive=1.6ms,

typical)

AEN=1

PEN=1

Hardware

Averaging

Loop 2 to 16

Times

After PON is set, it needs to wait

100μs before enabling PEN and AEN.

Sleep

Idle

Active

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