TMD2772

DIGITAL ALS

and PROXIMITY MODULE

TAOS147

E − DECEMBER 2012

20

r

r

Copyright

E 2012, TAOS Inc.

The LUMENOLOGY

r Company

www.taosinc.com

ALS Time Register (0x01)

The ALS time register controls the internal integration time of the ALS channel ADCs in 2.73 ms increments.

Upon power up, the ALS time register is set to 0xFF.

Table 6. ALS Integration Time Register

FIELD

BITS

DESCRIPTION

ATIME

7:0

VALUE

INTEG_CYCLES

TIME

MAX COUNT

0xFF

1

2.73 ms

1024

0xF6

10

27.3 ms

10240

0xDB

37

101 ms

37888

0xC0

64

175 ms

65535

0x00

256

699 ms

65535

Proximity Time Register (0x02)

The proximity time register controls the integration time of the proximity ADC in 2.73 ms increments. Upon power

up, the proximity time register is set to 0xFF. It is recommended that this register be programmed to a value of

0xFF (1 integration cycle).

Table 7.

FIELD

BITS

DESCRIPTION

PTIME

7:0

VALUE

INTEG_CYCLES

TIME

MAX COUNT

0xFF

1

2.73 ms

1023

Wait Time Register (0x03)

Wait time is set 2.73 ms increments unless the WLONG bit is asserted in which case the wait times are 12

×

longer. WTIME is programmed as a 2’s complement number. Upon power up, the wait time register is set to

0xFF.

Table 8.

Wait Time Register

FIELD

BITS

DESCRIPTION

WTIME

7:0

REGISTER VALUE

WAIT TIME

TIME (WLONG = 0)

TIME (WLONG = 1)

0xFF

1

2.73 ms

0.033 sec

0xB6

74

202 ms

2.4 sec

0x00

256

699 ms

8.4 sec

NOTE: The Proximity Wait Time Register should be configured before PEN and/or AEN is/are asserted.