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AN4374 Scheda tecnica(PDF) 6 Page - STMicroelectronics

Il numero della parte AN4374
Spiegazioni elettronici  The LED1642GW and ALED1642GW start-up guide
PDF  25 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4374 Scheda tecnica(HTML) 6 Page - STMicroelectronics

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First LED power-on
AN4374
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DocID025366 Rev 2
Figure 4. Brightness register setting
As mentioned, a 16-bit word with data latch has to be sent 15 times (see Figure 5).
Figure 5. Brightness register: first BRT word example
0E
0F
0C
0A
0B
0D
09
08
07
06
05
04
03
02
01
00
BRT14
BRT13
BRT15
BRT01
BRT02
BRT03
256-bit brightness data
stream
CLK
SDI
LE
16-bit Data Word
Data latch
CLK
SDI
LE
Global latch
0E
0F
0C
0A
0B
0D
09
08
07
06
05
04
03
02
01
00
BRT00
MSB
LSB
AM16853v1
Clk
SDI
LE
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
first bit
last bit
Brightness register : BRT output 15(*) = 0xFFFF– BRT outputs 14 to 0(*) = TBD
(BRT reg. output 15 = 0xFFFF)
(*) We are assuming that this is the first 16
-bit data word in the 16 word data stream needed to load correctly the brightness register.
Data Latch
Key
AM16854v1



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