AS1113 Datasheet, PDF (9/24 Pages) ams AG – 50mA, 16-Channel LED Driver with Diagnostics

AS1113
Data Sheet - Detailed Description
Serial Interface
Data accesses are made serially via pins SDI and SDO. At each CLK rising edge, the signal present at pin SDI is
shifted into the first bit of the internal shift register and the other bits are shifted ahead of the first bit. The MSB is the
first bit to be clocked in. In error-detection mode the shift register will latch-in the corresponding error data of tempera-
ture-, open-, and short-error register with each falling edge of LD.
The 16-bit data register will latch the data of the shift register at each rising edge of LD. This data is then used to drive
the current generator output drivers to switch on the corresponding LEDs as OEN goes low.
Timing Diagrams
This section contains timing diagrams referenced in other sections of this data sheet.
Figure 8. Normal Mode Timing Diagram
CLK
50%
tW(CLK)
50%
50%
tSU(D) tH(D)
SDI
50%
50%
SDO
LD
OEN
OUTNx
50%
tP1
50%
tW(L)
tSU(L)
50%
tH(L)
OEN Low = Output Enabled
50%
tP2
OUTNx High = Output Off
OUTNx Low = Output On
Figure 9. Output Delay Timing Diagram
OEN
OUTN0
OUTN1
OUTN15
50%
tW(OE)
tP3
50%
90%
10%
tOF
tSTAG
50%
50%
tP3
90%
10%
50%
tOR
tSTAG
50%
14XtSTAG
50%
14XtSTAG
50%
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