AS3677_17 datasheet(34/106 Pages) AMSCO

34 / 106 page

Page 34

ams Datasheet

Document Feedback

[v1-32] 2016-Sep-27

AS3677 − Detailed Description

Figure 46:

RGB3 Current Register

LED Pattern Generator

The LED pattern generator is capable of producing a pattern

with 32 bits length and 1 second duration (31.25ms for each

bit). The pattern itself can be started every second, every 2nd,

3rd up to 7th second3.

With this pattern all current sinks can be controlled. The pattern

itself switches the configured current sources between 0 and

their programmed current.

If everything else is switched OFF, the current consumption in

this mode is IACTIVE. (excluding current through switched ON

current source) and the charge pump, if required. The charge

pump can be automatically switched ON/OFF depending on the

pattern (set register cp_auto_on =1) to reduce the overall

current consumption.

Figure 47:

LED Pattern Generator AS3677 for pattern_color = 0

Addr: 0Dh

RGB3 Current

This register controls the RGB current sink current

Bit

Bit Name

Default

Access

Description

7:0

rgb3_current

0R/W

Defines current into Current sink RGB3

00h

0 mA

01h

0.1 mA

....

.....

FFh

25.5 mA

3. All times can be extended by a factor of 8 by setting pattern_slow=1 (this result in a delay of up to 56s)

any current sink

1 2 3 4 56 78 9 ... 32

12 3 4 56

At this time a delay of 0s,1s,2s,...,8s,16s,24s,32s,40s,48s,56s

can be programmed

78 9...

Defined by bit in the setup register pattern_data

in this example the code is 101110011...

31.25ms

(250ms if pattern_slow=1)

AS3677 Datasheet(PDF) 34 Page - ams AG

AS3677 Datasheet(HTML) 34 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL