［AP2152］

MS1348-E-00

13

2012/05

2-11) Serial interface

The AP2152 has a built in read only serial interface. By inputting a CLK signal to the SCLK pin, data

can be read from the SDATA pin synchronizing with the CLK rising edge. The SDATA pin is an Nch

open drain output. The pin needs to be pulled-up to the external power supply.

SDATA

State

CH1

Low

LED OPEN or SHORT ⇒ CH1 shutoff

CH2

Low

LED OPEN or SHORT ⇒ CH2 shutoff

CH3

Low

LED OPEN or SHORT ⇒ CH2 shutoff

TM

Low

Shut-off state by timer latch

SCLK

SDATA

CH1

CH2

CH3

TM

RESET

CH1

Figure8. Serial Interface Timing Chart