AS1113-BSSU Ver la hoja de datos (PDF) - austriamicrosystems AG

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AS1113-BSSU

50mA, 16-Channel LED Driver with Diagnostics

austriamicrosystems AG 

AS1113

Data Sheet - Detailed Description

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

OEN

LD

tSU(ERROR)

tGSW(ERROR)

Load Internal all 1s

Test Pattern

(optional)

Low-Current

Diagnosis Mode

tTESTING

tH(L)

CLK

SDI

tGSW(ERROR)

tSW(ERROR)

SDO

TFLAG OFLAG SFLAG

tP1

For detailed timing information see Timing Diagrams on page 9.

Don’t

Care

Re-entering Error

Detection Mode

(see Figure 14)

(see Figure 15)

Normal Operation Current

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

tSU(ERROR)

CLK

SDI

SDO

TFLAG

tP4

OFLAG

SFLAG

1 = Wakeup

0 = Shutdown

1 = Wakeup

0 = Shutdown

tSU(D)

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