TMD2772

DIGITAL ALS

and PROXIMITY MODULE

TAOS147

E − DECEMBER 2012

24

r

r

Copyright

E 2012, TAOS Inc.

The LUMENOLOGY

r Company

www.taosinc.com

Control Register (0x0F)

The Control register provides eight bits of miscellaneous control to the analog block. These bits typically control

functions such as gain settings and/or diode selection.

Table 14.

Control Register

6

75

4

2

31

0

CONTROL

PDRIVE

Resv

Reset

0x00

PDIODE

PGAIN

AGAIN

FIELD

BITS

DESCRIPTION

PDRIVE (Note 1)

7:6

Proximity LED Drive Strength.

()

FIELD VALUE

LED STRENGTH — PDL = 0

LED STRENGTH — PDL = 1

00

100 mA

11.1 mA

01

50 mA

5.6 mA

10

25 mA

2.8 mA

11

12.5 mA

1.4 mA

PDIODE

5:4

Proximity Diode Selector.

FIELD VALUE

DIODE SELECTION

00

Proximity uses neither diode

01

Proximity uses the CH0 diode

10

Proximity uses the CH1 diode

11

Reserved — Do not write

PGAIN

3:2

Proximity Gain.

FIELD VALUE

PROXIMITY GAIN VALUE

00

1

01

2

10

4

11

8

AGAIN

1:0

ALS Gain.

FIELD VALUE

ALS GAIN VALUE

00

1

01

8

10

16

11

120

NOTE 1: LED STRENGTH values (italic) are nominal operating values. Specifications can be found in the Proximity Characteristics table.