SFH 7770

2011-09-16

14

Ambient Light measurement data (0x8C: LSB ,

0x8D: MSB )

The result of the Ambient Light Sensor is a 16bit word with MSB and LSB and is stored in two registers..

The binary data can be converted directly to decimal „lx“ values (max. 65535lx)

Status of measurement data for Ambient Light Sensor (ALS) and Proximity Sensor (PS)

When the measurement data are available in the register, the corresponding status bit (bit 6 for

ambient-light; bit 4, 2 and 0 for proximity) in register 0x8E is set to „1“. When the measurement data

have been read by the MCU, the status bit is automatically set back to „0“.

Bit 7 is set „1“ when the measured ALS value is outside the threshold level settings (register 0x96...

0x99). Bit 1, 3 and 5 are set when the measured PS value is above the threshold level (register 0x93...

0x95).

The status of register 0x8E will always be updated when a new measurement is available.

Proximity measurement data (LED 1 , 8bit, logarithmic)

R-Register 0x8C

Bit

7

6

5

4

3

2

1

0

LSB data

default

00000000

R-Register 0x8D

Bit

7

6

5

4

3

2

1

0

MSB data

default

00000000

R-Register 0x8E

Bit

7

6

5

4

3

2

1

0

ALS

threshold

ALS

data

PS LED3

threshold

PS LED3

data

PS LED2

threshold

PS LED2

data

PS LED1

threshold

PS LED1

data

default

00000000

R-Register 0x8F

Bit

7

6

5

4

3

2

1

0

data

default

00000000