TSL2771

LIGHT-TO-DIGITAL CONVERTER

with PROXIMITY SENSING

TAOS100B − FEBRUARY 2011

21

The LUMENOLOGY

r Company

r

r

Copyright

E 2011, TAOS Inc.

www.taosinc.com

Persistence Register (0x0C)

The persistence register controls the filtering interrupt capabilities of the device. Configurable filtering is

provided to allow interrupts to be generated after each ADC integration cycle or if the ADC integration 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 9. Persistence Register

6

75

4

APERS

2

31

0

PERS

PPERS

Address

0x0C

FIELD

BITS

DESCRIPTION

PPERS

7:4

Proximity interrupt persistence. 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

APERS

3:0

Interrupt persistence. Controls rate of 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