TMG39921 datasheet(70/96 Pages) OSRAM

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ams Datasheet

Page 69

[v1-06] 2018-Feb-27

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TMG3992 − Register Description

Configuration Register A2 (CONFIG_A2),

Gesture Mode

This register contains settings that govern gesture detector

masking, FIFO interrupt generation, and gesture exit

persistence filter.

Figure 75:

Configuration Register A2

765

432

GFIFIOTH

GEXMSK

GEXPERS

Field

Bits

Description

GFIFOTH

7:6

Gesture FIFO Threshold. This value is compared with the FIFO Level (i.e. the

number of NSWE datasets) to generate an interrupt (if enabled).

Field Value

THRESHOLD

Interrupt is generated after 1 dataset is added to

FIFO

Interrupt is generated after 4 dataset is added to

FIFO

Interrupt is generated after 8 dataset is added to

FIFO

Interrupt is generated after 16 dataset is added

to FIFO

GEXMSK

5:2

Gesture Exit Mask. Controls which of the gesture detector photodiodes

(NSWE) will be included to determine a “gesture end” and subsequent exit of

the gesture state machine. Unmasked NSWE data will be compared with the

value in GEXTH. Field value bits correspond to NSWE detectors.

Field Value

EXIT MASK

0000

All NSWE detector data will be included in sum.

0001

E detector data will not be included in sum.

0010

W detector data will not be included in sum.

0100

S detector data will not be included in sum.

1000

N detector data will not be included in sum.

0101

….

0110

W & S detector data will not be included in the

sum.

1111

….

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