C12 datasheet(48/72 Pages) AMSOSRAM

48 / 72 page

AS3688

austriami crosyst ems

Datasheet, Confidential

www.austriamicrosystems.com (ptr,tje)

Revision 1.1.1 / 20060707

46 - 70

Subtract Enable

Addr: 35h

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

GPIO0 :GPIO2, GPI are four highly-configurable general purpose input/output pins which can be used for the

following functionality (each GPIO pin is independent from the other GPIO pins):

Digital Schmitt-Trigger Input

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

Tristate Output

Analog Input to the ADC (GPIO0, GPIO1, GPIO2, GPI)

Strobe for Camera Flash Current Sink (GPI)

Preview Current set input for Camera Flash Current Sink (GPIO2)

PWM operation with all current sinks (GPIO0); number of current sources using this PWM input is fully

configurable

Flash led overtemperature protection (GPIO2)

Default Mode for GPI is Input

Default Mode for GPIO0, GPIO1 and GPIO2 is Input (Pull-Down)

GPIO4 not applicable in the AS3688

Table

17 – GPIO Pin Function Summary

GPIO Pin

Pin #

Configuration

Additional Function

GPIO0

TBD

ADC Input; PWM Input

GPIO1

TBD

ADC Input; TXMask input

GPIO2

TBD

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

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

Pull-Down or Pull-Up Resistor

ADC Input; Preview Input for Photocamera

Flash LED (CURR3x); PWM Input

GPI

TBD

Digital Input

ADC Input; Strobe Input for Photocamera

Flash LED (CURR3x)

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