TSL2672 Datasheet, PDF (24/31 Pages) ams AG – DIGITAL PROXIMITY DETECTOR

TSL2672
DIGITAL PROXIMITY DETECTOR
TAOS133 − MAY 2012
Proximity Offset Register (0x1E)
The 8-bit proximity offset register provides compensation for proximity offsets caused by device variations,
optical crosstalk, and other environmental factors. Proximity offset is a sign-magnitude value where the sign
bit, bit 7, determines if the offset is negative (bit 7 = 0) or positive (bit 7 = 1). At power up, the register is set to
0x00. The magnitude of the offset compensation depends on the proximity gain (PGAIN), proximity LED drive
strength (PDRIVE), and the number of proximity pulses (PPULSE). Because a number of environmental factors
contribute to proximity offset, this register is best suited for use in an adaptive closed-loop control system. See
available TAOS application notes for proximity offset register application information.
lid _POFFSET
a _FIELD
v _SIGN
Technicaaml ^{scoAnGtent still MAGNITUDE}
7
SIGN
BIT
7
6:0
Table 16. Proximity Offset Register
6
5
4
3
2
1
0
MAGNITUDE
Reset
0x00
DESCRIPTION
Proximity Offset Sign. The offset sign shifts the proximity data negative when equal to 0 and positive when
equal to 1.
Proximity Offset Magnitude. The offset magnitude shifts the proximity data positive or negative, depending
on the proximity offset sign. The actual amount of the shift depends on the proximity gain (PGAIN), proximity
LED drive strength (PDRIVE), and the number of proximity pulses (PPULSE).
The LUMENOLOGY r Company
r
r
www.taosinc.com
Copyright E 2012, TAOS Inc.
23