TMD2772

DIGITAL ALS

and PROXIMITY MODULE

TAOS147

E − DECEMBER 2012

22

r

r

Copyright

E 2012, TAOS Inc.

The LUMENOLOGY

r Company

www.taosinc.com

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

6

75

4

APERS

2

31

0

PERS

PPERS

Reset

0x00

FIELD

BITS

DESCRIPTION

PPERS

7:4

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

APERS

3:0

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