AS3677 datasheet(45/68 Pages) AMSCO

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AS3677

Datasheet - D e ta i l e d D e s c r i p t i o n

8.5

General Purpose Input / Output

The pin DLS1, DLS2 are digital input, INT is an open drain output and ALS/GPIO1, GPIO2 and GPIO3 are a highly-

configurable general purpose input/output pins which can be used for the following functionality:

DLS1 and DLS2 primary function is a DLS input - see DLS(=DBC) - Dynamic Luminance Scaling Input on page 40

ALS/GPIO1 primary function is ALS input - see ALS - Ambient Light Sensing on page 32

Digital Schmitt Trigger Input

Digital Output with 4mA Driving Capability at 2.8V Supply (VANA)

Tristate Output

Analog Input to the ADC

Default Mode for ALS/GPIO1 is ADC input (as required for the ALS function), GPIO2 and GPIO3 is Input with Pull-

Down

Table 78.

GPIO Pin Function Summary

GPIO3 Pin

Configuration

Additional Function

ALS/GPIO1

Digital Input, Totem-Pole Output (Push/Pull),

Open Drain (PMOS or NMOS), High-Z, Pull-

Down or Pull-Up Resistor

ADC Input, ALS - light sensor input (see

page 32)

GPIO2, GPIO3

ADC Input

DLS1, DLS2

Digital Input

ADC Input, PWM Input, DLS input (see page

40)

INT

Open Drain Output

ADC Input

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