TMG3992 datasheet(63/96 Pages) OSRAM

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[v1-06] 2018-Feb-27

TMG3992 − Register Description

Configuration Three Register (CONFIG3 0x9F)

The CONFIG3 register is used to select which photodiodes are

used for proximity. Two photodiodes are paired to provide

signal. In proximity mode, North and East photodiodes are

connected forming a diode pair; similarly the South and West

photodiodes form a diode pair.

Figure 63:

Configuration Three Register

765

432

Reserved

PCMP

SAI

PMSK_N

PMSK_S

PMSK_W

PMSK_E

Field

Bits

Description

Reserved

7:6

Reserved. Bits must be set to 0.

PCMP

Proximity Gain Compensation Enable. This bit provides gain

compensation when proximity photodiode signal is reduced as a result of

sensor masking. If only one diode of the diode pair is contributing, then only

half of the signal is available at the ADC; this results in a maximum ADC value

of 127. Enabling PCMP enables an additional gain of 2x, resulting in a

maximum ADC value of 255.

SAI

Sleep After Interrupt. When enabled, the device will automatically enter

low power mode when the INT pin is asserted and the state machine has

progressed to the SAI decision block (Refer to Figure 28). Normal operation

is resumed when INT pin is cleared over I²C.

PMSK_N

Proximity Mask North Enable. Writing a 1 disables this photodiode.

PMSK_S

Proximity Mask South Enable. Writing a 1 disables this photodiode.

PMSK_W

Proximity Mask West Enable. Writing a 1 disables this photodiode.

PMSK_E

Proximity Mask East Enable. Writing a 1 disables this photodiode.

PMSK_X

(N, S, E, W)

PCMP

0,1,1,1

1,0,1,1

1,1,0,1

1,1,1,0

0,1,0,1

1,0,1,0

All Others

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