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AS3661 Datasheet(PDF) 26 Page - ams AG

Part # AS3661
Description  Programmable 9-channel LED Dr iver
PDF  87 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3661 Datasheet(HTML) 26 Page - ams AG

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www.austriamicrosystems.com
Revision 1.3
25 - 85
AS3661
Datasheet - D e t a i l e d D e s c r i p t i o n
8.8.7 Program Downloading
First the register page_select is set to the program page, which should be accessed. Then the program page (part of or
full page) can be downloaded to the registers Cmd_0_MSB, Cmd_0_LSB, Cmd_1_MSB, Cmd_1_LSB...Cmd_F_MSB,
Cmd_F_LSB (I
2C registers area 50h to 6Fh).
8.9 Register Set
The AS3661 is controlled by a set of registers through the two wire serial interface port. Some register bits are
reserved for future use. Table below lists device registers, their addresses and their abbreviations. A more detailed
description is given in chapter Control Register Details.
Table 6. Page_Select Register
Addr: 4Fh
Page_Select Register
Bit
Bit Name
Default Access
Description
2:0
page_select
000b
R/W
Selects program page for download
000
page 0 - Addr 00h-0Fh
001
page 1 - Addr 10h-1Fh
010
page 2 - Addr 20h-2Fh
011
page 3 - Addr 30h-3Fh
100
page 4 - Addr 40h-4Fh
101
page 5 - Addr 50h-5Fh
110
don’t use
111
don’t use
Table 7. Description of Registers
Hex
Address
Register Name
Bit(s)
Type
Default Value
After Reset
Description
00
ENABLE / ENGINE
CNTRL1
[6]
R/W
x0xxxxxx
CHIP_EN
0
AS3661 not enabled
1
AS3661 enabled
[5:4]
xx00xxxx
ENGINE1_EXEC
Engine 1 program execution control
[3:2]
xxxx00xx
ENGINE2_EXEC
Engine 2 program execution control
[1:0]
xxxxxx00
ENGINE3_EXEC
Engine 3 program execution control
01
ENGINE CNTRL2
[5:4]
R/W
xx00xxxx
ENGINE1_MODE
ENGINE 1 mode control
[3:2]
xxxx00xx
ENGINE2_MODE
ENGINE 2 mode control
[1:0]
xxxxxx00
ENGINE3_MODE
ENGINE 3 mode control
02
OUTPUT DIRECT/
RATIOMETRIC
MSB
[0]
R/W
xxxxxxx0
LED9_RATIO_EN
Enables ratiometric dimming for LED9 output



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