AS3668 Evalboard 1v1– AN01
Preliminary Application Note –
4 Channel Breathlight Controller
7.2.3 Pattern Control
At first you need to set CURR1 to CURR4 to “Pattern Mode” and 10mA in the “Current Source/PWM” menu.
In the “Pattern Control” menu you have a lot of options: o
Rise/Fall Time: Here you can set the duration for how long the LEDs should need from 0% to
100% (and also from 100% to 0%) of the current you set (10mA). o
On Time: This is the time where the LEDs stay on 100% before they start to fall. o
Pause Time: This is the time where the LEDs stay on 0% before they start to rise again. o
Off Time: Here you can set how long the LEDs should be off after every cycle.
Configure “Pattern Mode” for the current sources (1).
Enable “Register Pattern Start” (2).
Start the pattern by clicking “Start Pattern” (3).
Now you can see the selected pattern.
AG still valid
Technical
www.austriamicrosystems.com (mmt) Revision 1.0 / 2011/03/30 11 - 17
AS3668 Evalboard 1v1– AN01
Preliminary Application Note –
4 Channel Breathlight Controller
8 AS3668 Evalboard 1V1 jumper and device locations
Listed below are the various connectors and jumpers.
Jumper Function
Jumper setting
J1 Enable audio comment
Y Pin to enable Audio Mode @ the GPIO Pin
J2
J3
Enable curr4-audio
GPIO, GND
If a RGB audio pattern will be run, Curr4 can be used as Audio
Input
For measurements J3 sets GPIO to GND
Chip pins J4, J5, J6,
J7
J8
J18
J19
J20
J21
J23
J24
J9
J10
J11
J12, J13,
J14, J15,
J16, J17,
J22
Device
U1
I2C/Power-IF
Enable GPIO
Enable USB Pattern
USB = VBAT
GND
White LED
RGB
Custom
VDD
I2C-IF Connector
Power LED
AS3668
Value
Can be used for connecting an adapter board (if no chip is soldered directly on the board)
Y Disable or Enable I2C communication.
Breathlight pattern activatet through Vbat
Y Enables USB Breathlight pattern through USB( CHG-DET)
Connect VBAT to VUSB
Indicates if an Supply on Vbat is connected
AG still valid
Figure 3: Connector and Jumper locations
Technical
www.austriamicrosystems.com (mmt) Revision 1.0 / 2011/03/30 12 - 17
