HT1668 datasheet(7/12 Pages) ARTSCHIP

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pin, therefore, it is highly recommended that an external pull-up resistor (1 KOhms to 10 KOhms) must be connected to DOUT.

RECEPTION (Data/Command Write)

If data continues

STB

DIN

CLK

TRANSMISSION (Data Read)

1234

567

3456

Data Read Command is set

Data Reading Starts

twait

STB

DIN

CLK

DOUT

b0 b1 b2 b3 b4 b5 b6 b7

b0 b1 b2 b3 b4 b5

where: twait (waiting time) ≥ 1μs

It must be noted that when the data is read, the waiting time (twait ) between the rising of the eighth clock that has set the

command and the falling of the first clock that has read the data is greater or equal to 1μs.

SWITCHING CHARACTERISTIC WAVEFORM

HT1668 Switching Characteristics Waveform is given below.

STB

CLK

setup

hold

CLK

t CLK-STB

TZH

THZ

TZL

TLZ

PZL

PLZ

OSC

STB

CLK

fosc

50%

90%

10%

90%

DIN

DOUT

LED Driver IC

HT1668

HT1668 数据表(PDF) 7 Page - ARTSCHIP ELECTRONICS CO.,LMITED.

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