Version 1.2

SFH 7779

2016-04-25

3

Short Evaluation program



I

• 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 I

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

Block diagram



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

8

Analog / amplifier

digital

+

data-

register

proximity

ambient

light

LED

driver

4

5

SDA

SCL

7

6

INT

GND

CATH

5

Analog / amplifier

digital

+

data-

register

proximity

ALS

VIS

LED

driver

7

2

SDA

SCL

3

1

14

8

INT

GND

V

DD

V

DD

LED_A

LED_C

ALS

IR

86

LDR

8

Analog / amplifier

digital

+

data-

register

proximity

ambient

light

LED

driver

4

5

SDA

SCL

7

6

INT

GND

CATH

5

Analog / amplifier

digital

+

data-

register

proximity

ALS

VIS

LED

driver

7

2

SDA

SCL

3

1

14

8

INT

GND

V

DD

V

DD

LED_A

LED_C

ALS

IR

86

LDR