Version 1.1

4

Version 1.1

SFH 7771

Short Evaluation program



I²C interface

• I/O-pins are open drain type and logic high level is set with external pull-up resistors

• SFH 7771 operates in slave mode. Slave address is 0111000 (0x38) when ADDR-Pin is connected

to GND or 0111001 (0x39) if ADDR-pin is connected to V

DD

• Designed for the I²C Fast mode (400 kb/s)

• Interrupt pin (INT): open-drain output (like SDA and SCL)

Block diagram



Register

Command

Action

0x42

0x3F

set LED pulse current to 200mA and ALS gain to x128

0x41

0x06

activate ALS & PS with a measurement repetition time of 100ms

Wait 100ms

0x44

read data

read LSB of proximity measurement data

0x45

read data

read MSB of proximity measurement data

0x46

read data

read LSB of ambient light measurement of VIS diode

0x47

read data

read MSB of ambient light measurement of VIS diode

0x48

read data

read LSB of ambient light measurement of IR diode

0x49

read data

read MSB of ambient light measurement of IR diode