TCS3772

COLOR LIGHT-TO-DIGITAL CONVERTER

with PROXIMITY SENSING

TAOS145B − SEPTEMBER 2012

20

r

r

Copyright

E 2012, TAOS Inc.

The LUMENOLOGY

r Company

www.taosinc.com

RGBC Time Register (0x01)

The RGBC timing register controls the internal integration time of the RGBC clear and IR channel ADCs in

2.4-ms increments. Upon power up, the RGBC time register is set to 0xFF.

Table 6. RGBC Time Register

FIELD

BITS

DESCRIPTION

ATIME

7:0

VALUE

INTEG_CYCLES

TIME

MAX COUNT

0xFF

1

2.4 ms

1024

0xF6

10

24 ms

10240

0xD6

42

101 ms

43008

0xAD

64

154 ms

65535

0x00

256

614 ms

65535

Proximity Time Register (0x02)

The proximity timing register controls the integration time of the proximity ADC in 2.4 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).

Max Prox Count = ((256 − PTIME)

× 1024)) − 1

up to a maximum of 65535

Table 7.

Proximity Time Register

FIELD

BITS

DESCRIPTION

PTIME

7:0

VALUE

INTEG_CYCLES

TIME

MAX COUNT

0xFF

1

2.4 ms

1023

Wait Time Register (0x03)

Wait time is set 2.4 ms increments unless the WLONG bit is asserted in which case the wait times are 12

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

2.4 ms

0.029 sec

0xAB

85

204 ms

2.45 sec

0x00

256

614 ms

7.4 sec

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