TSL2571

LIGHT-TO-DIGITAL CONVERTER

TAOS117A − FEBRUARY 2011

18

r

r

Copyright

E 2011, TAOS Inc.

The LUMENOLOGY

r Company

www.taosinc.com

ADC Channel Data Registers (0x14 − 0x17)

ALS data is stored as two 16−bit values. To ensure the data is read correctly, a two−byte read I2C transaction

should be used with auto increment protocol bits set in the command register. With this operation, when the

lower byte register is read, the upper eight bits are stored in a shadow register, which is read by a subsequent

read to the upper byte. The upper register will read the correct value even if additional ADC integration cycles

end between the reading of the lower and upper registers.

Table 12. ADC Channel Data Registers

REGISTER

ADDRESS

BITS

DESCRIPTION

C0DATA

0x14

7:0

ALS CH0 data low byte

C0DATAH

0x15

7:0

ALS CH0 data high byte

C1DATA

0x16

7:0

ALS CH1 data low byte

C1DATAH

0x17

7:0

ALS CH1 data high byte