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AS1113
Datasheet - D e t a i l e d D e s c r i p t i o n
On the next falling edge of OEN, current is reduced to I LC . With the next rising edge of OEN the current will immedi-
ately increase to normal levels and the detailed error report can be read out entering error-detection mode.
Figure 16. Switching into Low-Current Diagnostic Mode Timing Diagram
Low-Current
Diagnosis Mode
OEN
t TESTING
LD
t SU(ERROR)
t GSW(ERROR)
Load Internal all 1s
Test Pattern
(optional)
t H(L)
CLK
t GSW(ERROR)
t SW(ERROR)
SDI
Re-entering Error
Detection Mode
SDO
T FLAG O FLAG S FLAG
t P1
Don’t
Care
(see Figure 14)
(see Figure 15)
Normal Operation Current
For detailed timing information see Timing Diagrams on page 9 .
Shutdown Mode
The AS1113 features a shutdown mode which can be entered via 4 clock pulses during error-detection mode. To
enable the shutdown mode a 0 must be placed at SDI after the rising edge of the 3rd clock pulse.
To disable shutdown mode a 1 must be placed at SDI after the 3rd clock pulse. The shutdown/wakeup information will
be latched through if multiple AS1113 devices are in a chain. At the rising edge of the 4th clock pulse the shutdown bit
will be read out and the AS1113 will shutdown or wakeup.
Note: In shutdown mode the supply current drops down to <10μA.
Figure 17. Shutdown Mode Timing Diagram
OEN
LD
t SU(ERROR)
CLK
1 = Wakeup
SDI
0 = Shutdown
1 = Wakeup
SDO
T FLAG
O FLAG
S FLAG
0 = Shutdown
t P4
t SU(D)
www.austriamicrosystems.com/LED-Driver-ICs/AS1113
Revision 1.04
16 - 24
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