www.austriamicrosystems.com/LED-Driver-ICs/AS1113

Revision 1.04

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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 ILC. 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

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

For detailed timing information see Timing Diagrams on page 9.

OFLAG

TFLAG

SFLAG

Don’t

Care

Re-entering Error

Detection Mode

(see Figure 14)

(see Figure 15)

tTESTING

SDI

OEN

LD

CLK

SDO

Load Internal all 1s

Test Pattern

(optional)

tSW(ERROR)

tP1

tSU(ERROR)

Normal Operation Current

tGSW(ERROR)

tGSW(ERROR)

Low-Current

Diagnosis Mode

tH(L)

SDI

OEN

LD

CLK

SDO

1 = Wakeup

0 = Shutdown

1 = Wakeup

0 = Shutdown

OFLAG

TFLAG

SFLAG

tP4

tSU(ERROR)

tSU(D)