TMD27721 Datasheet, PDF (25/35 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – DIGITAL ALS and PROXIMITY MODULE

TMD2772
DIGITAL ALS
and PROXIMITY MODULE
TAOS147E − DECEMBER 2012
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
7
6
5
4
3
2
1
0
CONTROL
PDRIVE
ResvPDIODE
PGAIN
AGAIN
Reset
0x00
lid ^FIELD
PDRIVE (Note 1)
ill ^{va PDIODE}
AG ^{t st} _PGAIN
aml ^sconten AGAIN
BITS
7:6
5:4
3:2
1:0
DESCRIPTION
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
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
Proximity Gain.
FIELD VALUE
00
01
10
1× gain
2× gain
4× gain
PROXIMITY GAIN VALUE
11
8× gain
ALS Gain.
FIELD VALUE
00
01
1× gain
8× gain
ALS GAIN VALUE
10
16× gain
11
120× gain
Technica ^{NOTE 1: LED STRENGTH values (italic) are nominal operating values. Specifications can be found in the Proximity Characteristics table.}
Copyright E 2012, TAOS Inc.
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