TMG39921 datasheet(72/96 Pages) OSRAM

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ams Datasheet

Page 71

[v1-06] 2018-Feb-27

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TMG3992 − Register Description

Configuration Register A3 (CONFIG_A3),

Gesture Mode

This register contains settings that govern wait time, LDR drive

current strength and Gesture gain control. The GWTIME

controls the amount of time in a low power mode between

gesture detection cycles. GPDRIVE sets the LDR drive current

strength governing LED intensity. GGAIN sets the analog gain

associated with the photodiode output.

Figure 76:

Configuration Register A3

765

432

GENAL

GGAIN

GLDRIVE

GWTIME

Field

Bits

Description

GENAL

Gesture Enter Always. With Gesture enabled, If GENAL= 1, any PDATA result

(including 0) will always cause entry into the gesture state machine. If

GENAL = 0, entry into the gesture state machine is conditional based on PDATA

and GPENTH.

GGAIN

6:5

Gesture Gain. Gesture Gain Control.

Field Value

GESTURE GAIN VALUE

1x Gain

2x Gain

4x Gain

8x Gain

GLDRIVE

4:3

Gesture LED Drive Strength. Sets LED Drive Strength in gesture mode.

FIELD VALUE

LED Strength

100% (100mA typical)

50%

25%

12.5%

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