TMD27721 Datasheet, PDF (23/35 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – DIGITAL ALS and PROXIMITY MODULE

TMD2772
DIGITAL ALS
and PROXIMITY MODULE
TAOS147E − DECEMBER 2012
Persistence Filter Register (0x0C)
The persistence filter register controls the interrupt capabilities of the device. Configurable filtering is provided
to allow interrupts to be generated after every ADC cycle or if the ADC cycle has produced a result that is outside
of the values specified by threshold register for some specified amount of time. Separate filtering is provided
for proximity and ALS functions. ALS interrupts are generated using C0DATA.
Table 11. Persistence Filter Register
lid PERS
FIELD
PPERS
Technicaaml ^{scoAnGtent still va APERS}
7
BITS
7:4
3:0
6
5
4
3
2
1
0
PPERS
APERS
Reset
0x00
DESCRIPTION
Proximity interrupt persistence filter. Controls rate of proximity interrupt to the host processor.
FIELD VALUE MEANING
INTERRUPT PERSISTENCE FUNCTION
0000
−−−
Every proximity cycle generates an interrupt
0001
1
1 proximity value out of range
0010
2
2 consecutive proximity values out of range
...
...
...
1111
15
15 consecutive proximity values out of range
ALS Interrupt persistence filter. Controls rate of ALS interrupt to the host processor.
FIELD VALUE MEANING
INTERRUPT PERSISTENCE FUNCTION
0000
Every Every ALS cycle generates an interrupt
0001
1
1 value outside of threshold range
0010
2
2 consecutive values out of range
0011
3
3 consecutive values out of range
0100
5
5 consecutive values out of range
0101
10
10 consecutive values out of range
0110
15
15 consecutive values out of range
0111
20
20 consecutive values out of range
1000
25
25 consecutive values out of range
1001
30
30 consecutive values out of range
1010
35
35 consecutive values out of range
1011
40
40 consecutive values out of range
1100
45
45 consecutive values out of range
1101
50
50 consecutive values out of range
1110
55
55 consecutive values out of range
1111
60
60 consecutive values out of range
Copyright E 2012, TAOS Inc.
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