AS3668 datasheet(49/60 Pages) AMSCO

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AS3668

Data Sheet - A p p l i c a t i o n I n f o r m a t i o n

Table 46. Code Example Dual Pulse Pattern Example

10.1.3 RGB LED Pattern

In this example we would like to demonstrate how to use an RGB LED which is connected to CURR1, CURR2 and CURR3.

Figure 51. RGB Pulse Pattern Example

With the timing example above you get a mixture of red, green and blue color. Table 43 below shows how to configure the device to get the

pattern shown in Figure 51.

Table 47. Code Example RGB Pulse Pattern

Address

Write Value

Comments

CurrX Control

0x01

0x03

Enable CURR1 for pattern generation mode. Other

current sources are off

CURR1 Current

0x02

0xFF

Set the output current of CURR1 to 25,5mA.

PWM Timing

0x16

0x11

Define Rise/Fall time with 0,12s

Pattern Timing

0x18

0x30

Define 0,04s on time and 4,2s off time

Multiple Pulse

0x19

0x41

Define 2 pulses and 150ms pause time

Start Control

0x1B

0x02

Start breathlight pattern

Address

Write Value

Comments

CurrX Control

0x01

0x3F

Enable CURR1, CURR2 and CURR3 for pattern

generation mode. CURR4 is in off mode.

CURR1 Current

0x02

0x4F

Set the output current of CURR1 to 7,9mA.

CURR2 Current

0x03

0xC8

Set the output current of CURR2 to 20mA.

CURR3 Current

0x04

0xB6

Set the output current of CURR3 to 18,2mA.

PWM Timing

0x16

0x88

Define Rise/Fall time with 2.1s

Pattern Timing

0x18

0x25

Define 1,1s on time and 1,1s off time

Multiple Pulse

0x19

0x00

Define single pulse mode

Start Control

0x1B

0x02

Start breathlight pattern

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