AS1110 AMSCO [austriamicrosystems AG], AS1110 Datasheet - Page 9

• Manufacturer Part Number: AS1110
• Description: Constant-Current, 16-Channel LED Driver with Diagnostics
• Manufacturer: AMSCO [austriamicrosystems AG]

AS1110
Data Sheet - D e t a i l e d D e s c r i p t i o n
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
Figure 9. Output Delay Timing Diagram
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OUTNx
OUTN15
OUTN0
OUTN1
SDO
OEN
CLK
SDI
OEN
LD
50%
50%
t
SU(D)
t
H(D)
t
W(CLK)
50%
50%
50%
t
P1
50%
OEN Low = Output Enabled
t
SU(L)
Revision 1.00
t
W(L)
50%
t
P2
50%
t
H(L)
50%
50%
t
P3
50%
t
t
OF
W(OE)
90%
50%
t
STAG
10%
14
X
t
STAG
50%
OUTNx High = Output Off
OUTNx Low = Output On
10%
90%
t
50%
P3
t
OR
t
50%
STAG
14
X
t
STAG
50%
50%
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