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PDF AS3661 Data sheet ( Hoja de datos )
| Número de pieza | AS3661 | |
| Descripción | Programmable 9-channel LED Driver | |
| Fabricantes | austria microsystems | |
| Logotipo |  |
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ams AG
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1 page  
AS3661
Datasheet
8.13.11 MUX_LD_ADDR ..............................................................................................................................74
8.14 Branch Instructions ....................................................................................................................................75
8.14.1 RST ....................................................................................................................................................75
8.14.2 BRANCH (Numerical) ........................................................................................................................75
8.14.3 BRANCH (Variables) ..........................................................................................................................76
8.14.4 INT .....................................................................................................................................................76
8.14.5 END ....................................................................................................................................................76
8.14.6 TRIGGER ...........................................................................................................................................76
8.14.7 JNE/JL/JGE/JE ..................................................................................................................................77
8.15 Arithmetic Instructions ...............................................................................................................................78
8.15.1 LD .......................................................................................................................................................78
8.15.2 ADD (Numerical Operands) ...............................................................................................................78
8.15.3 ADD (Variables) .................................................................................................................................78
8.15.4 SUB (Numerical) ................................................................................................................................79
8.15.5 SUB (Variables) .................................................................................................................................79
9 Typical Application ........................................................................................................................... 81
9.1 Recommended External Components .........................................................................................................82
10 Package Drawings and Markings .................................................................................................. 83
11 Ordering Information ...................................................................................................................... 84
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5 Page 
AS3661
Datasheet - Electrical Characteristics
3. Output current accuracy is the difference between actual value of the output current and programmed value of
this current. IMATCH is determined as follows:
For the constant current D1 to D9, the following are determined: The maximum current (max) and the minimum
current (min), then the IMATCH is calculated with: IMATCH = 100*(((max-min)/2)+((max+min)/2))/((max+min)/2)-
100
4. Saturation voltage is defined as the voltage when the LED current has dropped 10% from the value measured
at VCP - 1V.
5. Total unadjusted error includes offset, full-scale and linearity errors.
6. The I2C host should allow at least 500µs before sending data the AS3661after the rising edge of the enable
line.
Figure 3. I2C mode Timing Diagram
SDA
SCL
tBUF
tLOW
tR
STOP START
tHD:STA
tHD:DAT
tF
tHIGH
tSU:DAT
tHD:STA
tSU:STA
REPEATED
START
tSU:STO
.
Table 4. Electrical Characteristics I2C1
Symbol
Parameter
I2C mode timings - see Figure 3 on page 10
fSCLK SCL Clock Frequency
Bus Free Time
tBUF Between a STOP and
START Condition
tHD:STA
Hold Time (Repeated)
START Condition2
tLOW
LOW Period of SCL
Clock
tHIGH
HIGH Period of SCL
Clock
Condition
Min Typ Max Unit
0 400 kHz
1.3 µs
0.6 µs
1.3 µs
0.6 µs
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| Páginas | Total 30 Páginas | |
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