AS3689 datasheet(49/72 Pages) AMSOSRAM

49 / 72 page

AS3689

austriami crosyst ems

Datasheet, Confidential

www.austriamicrosystems.com (mlg, ptr)

Revision 1.0.2 / 20070115

47 - 70

Addr: 35h

Subtract Enable

Enable the inversion from the signal from the pwm generator

Bit

Bit Name

Default

Access

Description

sub_en1

R/W

Inverts the signal from the pwm generator

0 = Direct Operation (no inversion)

1 = The signal from the pwm generator for which the adder

is enabled (curr1_adder = 1, curr41_adder = 1,

rgb1_adder = 1) is inverted

sub_en2

R/W

Inverts the signal from the pwm generator

0 = Direct Operation (no inversion)

1 = The signal from the pwm generator for which the adder

is enabled (curr2_adder = 1, curr42_adder = 1,

rgb2_adder = 1) is inverted

sub_en3

R/W

Inverts the signal from the pwm generator

0 = Direct Operation (no inversion)

1 = The signal from the pwm generator for which the adder

is enabled (curr42_adder = 1, rgb3_adder = 1) is inverted

7.5

General Purpose Input / Outputs

GPIO,GPI are highly-configurable general purpose input/output pins which can be used for the following

functionality:

Digital Schmitt-Trigger Input

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

Tristate Output

Analog Input to the ADC

Strobe for Camera Flash Current Sink (GPI)

Preview Current set input for Camera Flash Current Sink (GPIO)

PWM operation with all current sinks (GPIO); number of current sources using this PWM input is fully

configurable

Flash led overtemperature protection (GPIO)

Default Mode for GPI is Input

Default Mode for GPIO is Input (Pull-Down)

Table 18 – GPIO Pin Function Summary

GPIO Pin

Configuration

Additional Function

GPIO

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

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

Pull-Down or Pull-Up Resistor

ADC Input; PWM Input, Preview Input for

Photocamera Flash LED (CURR3x)

GPI

Digital Input

ADC Input; Strobe Input for Photocamera

Flash LED (CURR3x)

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