TSL4531

DIGITAL AMBIENT LIGHT SENSOR

TAOS112 − OCTOBER 2011

10

r

r

Copyright

E 2011, TAOS Inc.

The LUMENOLOGY

r Company

www.taosinc.com

ALS Data Registers (0x04 − 0x05)

The ADC data is expressed as a 16-bit word stored in two 8-bit registers. The read-only ADC data registers

DATALOW and DATAHIGH provide the low and high bytes, respectively, of the 16-bit ADC conversion value.

The conversion value translates directly to units of lux.

Table 5. ALS Data Registers

REGISTER

ADDRESS

BITS

DESCRIPTION

DATALOW

0x04

7:0

ADC conversion low byte

DATAHIGH

0x05

7:0

ADC conversion high byte

ID Register (0x0A)

The ID register is a read-only register that provides the value for the part number. The PARTNO field indicates

the part number of each device given in the Available Options section and will remain constant.

Table 6. ID Register

6

75

4

2

31

0

CONTROL

Reset

ID

PARTNO

Reserved

FIELD

BITS

DESCRIPTION

FIELD VALUE

DEVICE PART NUMBER

1000

TSL45317

PARTNO

7:4

1001

TSL45313

PARTNO

7:4

1010

TSL45315

1011

TSL45311

Reserved

3:0

Reserved

The ID register is useful for validating the device type and for verifying the functionality of the interface. When

used for this purpose, it is recommended that the Reserved field be masked out as follows:

Value = ID AND 0xF0, where AND represents a bit-wise AND function