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.

Don’t

Care

Re-entering Error Detection

Mode

(see Figure 15)

(see Figure 16)

SDI

OEN

LD

CLK

SDO

Load Internal all 1s Test

Pattern

(optional)

Normal Operation Current

Low-Current

Diagnosis Mode

SDI

OEN

LD

CLK

SDO

1 = Wakeup

0 = Shutdown

1 = Wakeup

0 = Shutdown