TSL2571

LIGHT-TO-DIGITAL CONVERTER

TAOS117A − FEBRUARY 2011

15

The LUMENOLOGY

r Company

r

r

Copyright

E 2011, TAOS Inc.

www.taosinc.com

Wait Time Register (0x03)

Wait time is set 2.72 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.

Table 5.

Wait Time Register

FIELD

BITS

DESCRIPTION

WTIME

7:0

REGISTER VALUE

WAIT TIME

TIME (WLONG = 0)

TIME (WLONG = 1)

0xFF

1

2.72 ms

0.032 sec

0xB6

74

201 ms

2.4 sec

0x00

256

696 ms

8.3 sec

NOTE: The Wait Time Register should be configured before AEN is asserted.

ALS Interrupt Threshold Registers (0x04 − 0x07)

The ALS interrupt threshold registers provides the values to be used as the high and low trigger points for the

comparison function for interrupt generation. If C0DATA crosses below the low threshold specified, or above

the higher threshold, an interrupt is asserted on the interrupt pin.

Table 6. ALS Interrupt Threshold Registers

REGISTER

ADDRESS

BITS

DESCRIPTION

AILTL

0x04

7:0

ALS low threshold lower byte

AILTH

0x05

7:0

ALS low threshold upper byte

AIHTL

0x06

7:0

ALS high threshold lower byte

AIHTH

0x07

7:0

ALS high threshold upper byte