AS3682

Data Sheet

www.austriamicrosystems.com

Revision 2.21

12 - 43

9 Mode Settings

The AS3682 can operate in four different application modes which can be easily selected either by external pins or will

be factory preset.

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The maximum total Flash Current of 450mA can be set in 15 or 30mA steps. Preview and strobe timing can be con-

trolled either by internal registers or by dedicated pins (STROBE/F2, GPIO0/P0) connected to the BB or a camera

module. The 3 Flash LED current sinks can only be addressed as a single block.

The three General Purpose LED current sinks can be addressed individually allowing for the realization of Back-

lighting, Movie Indicator LEDs or an RGB Fun Light or can be connected to the Flash LED. The maximum current

per sink is 37.5mA whereas the current can be set in 2.5mA steps per channel.

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ters. The maximum total Flash Current of 480mA can be set in 1.875mA steps. Preview and strobe timing can be

controlled either by internal registers or by dedicated pins (STROBE/F2, GPIO0/P0) connected to the BB or a Cam-

era Module. The 3 Flash LED current sinks can only be addressed as a single block.

The three General Purpose LED current sinks can be addressed individually allowing for the realization of Back-

lighting, Movie Indicator LEDs or an RGB Fun Light or can be connected to the Flash LED. The maximum current

per sink is 160mA whereas the current can be set in 2.5mA steps per channel.

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Hard Flash Mode 1 – All AS3682 functions are controlled by dedicated Enable Pins. Seven different current levels

can be set independently for Preview and Flash by the Preview pins (GPIO0/P0, DATA/P1, CLK/P2) and the Flash

pins (T1/F0, SFL/F1, STROBE/F2). The maximum total current is 450mA for strobe and 240mA for preview when

connecting 3 current sinks to the LED. Since Hard Flash Mode 1 addresses all 6 current sinks, higher preview and

strobe currents can be programmed, however the total absolute maximum current must not exceed 480mA.

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Hard Flash Mode 2 – All AS3682 functions are controlled by dedicated Enable Pins. The three Flash Current sinks

(Curr11, Curr12, Curr13) act as a single block being controlled by the Flash control pins (T1/F0, SFL/F1, STROBE/

F2). The maximum total Flash current of 450mA can be adjusted in 60mA steps.

The three General Purpose LED current sinks (Curr11, Curr12, Curr13)) can be addressed independently from the

Flash LEDs by dedicated pins (GPIO0/P0, DATA/P1, CLK/P2). The current per-sink can be adjusted in 6 levels up

to 20mA per channel with a resolution of 2.5mA. A seventh level allows for a maxim of 37.5mA which can be used