HT1668 datasheet(8/12 Pages) ARTSCHIP

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where:

PWCLK (Clock Pulse Width) ≥ 400nS

PWSTB (Strobe Pulse Width) ≥1μs

tsetup (Data Setup Time) ≥100nS

thold (Data Hold Time) ≥100nS

tCLK-STB (Clock-Strobe Time) ≥1μs

tTHZ(Fall Time)≤10μs

tTZH(Rise Time) ≤1μs

tPZL(Propagation Delay Time) ≤100nS

fosc=Oscillation Frequency

tPLZ(Propagation Delay Time) ≤300uS

tTZL< 1μs

tTLZ<10μs

Note: Test condition under

tTHZ ( Pull low risistor=100k ohms, Loading capacitor =300pf)

tTLZ (Pull high risistor =100k ohms, Loading capacitor=300pf )

APPLICATIONS

Display memory is updated by incrementing addresses. Please refer to the following diagram.

Command1

Command2

Command3

Command4

Data1

Data n

STB

CLK

DIN

where: Command 1: Display Mode Setting Command

Command 2: Data Setting Command

Command 3: Address Setting Command

Data 1 to n : Transfer Display Data (14 Bytes max.)

Command 4: Display Control Command

The following diagram shows the waveforms when updating specific addresses.

Data

Command2

Command3

Data

Command 3

STB

CLK

DIN

where: Command 2 — Data Setting Command

Command 3 — Address Setting Command

Data — Display Data

LED Driver IC

HT1668

HT1668 Fiches technique(PDF) 8 Page - ARTSCHIP ELECTRONICS CO.,LMITED.

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