SFH7779 datasheet(5/42 Pages) AMSCO

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SFH 7779

DATASHEET

5 | Version 1.7 | 2023-05-24

Pin description

Name

Function

VDD

Power supply pin

SCL

I2C bus serial clock pin

GND

Ground pin

LED_A

Anode of the LED

LED_C

Cathode of the LED

LDR

LED driver pin

INT

Interrupt pin; open drain output; configured via I2C bus

SDA

I2C bus serial data pin

Short Evaluation program

Adress

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

I2C interface

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

- SFH 7779 operates in slave mode. Slave address is 0111001 (0x39h)

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

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

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