www.ams.com/LED-Driver-ICs/AS1110

Revision 1.6

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AS1110

Datasheet - Detailed Descr i p ti on

Figure 17. Switching into Low-Current Diagnostic Mode Timing Diagram

8.7 Shutdown Mode

The AS1110 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 AS1110 devices are in a chain. At the rising edge of the 4th clock pulse the shutdown bit will be read out and the AS1110 will shutdown

or wakeup.

Note:

In shutdown mode the supply current drops down to <10µA.

Figure 18. 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 15)

(see Figure 16)

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)