16-bit Constant Current LED Driver with Error Detection

Version:A.006

Page 11

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DM13C

Serial Data Interface

The serial-in data (DAI) will be clocked into 16 bit shift register synchronized on the rising

edge of the clock (DCK). The data ‘1’ represents the corresponding current output ‘ON’, while the

data ‘0’ stands for ‘OFF’. The data will be transferred into the 16 bit latch synchronized on the

rising edge (edge trigger) of the strobe signal (LAT); otherwise, the data will be held. The latch

pulse should be sent after the falling edge of the last clock within a frame data. The trigger timing of

the serial-out data (DAO) will be shifted out on synchronization to the rising edge of the clock. All

outputs are turned off while enable terminal (EN) is kept at high level. And they are active when EN

shifts to low.

previous data

1

2

3

4

14

15

16

1

2

3

DCK

DAI

DAO

LAT

EN

OUT0

OUT1

OUT2

OUT12

OUT13

OUT14

OUT15

on

off

on

off

on

off

on

off

on

off

on

off

on

off

high

low

high

low

high

low

high

low

high

low