Rev. 1.00

21

January 18, 2012

HT16525

Power-off Flowchart

Display operation mode

Turn off VH

Turn off VDD

Application Circuit

RST Pin is Connected to a MCU

Micro-

controller

AD1-2

S1-40

G1-24

VH

P1-2

VDD

LED

2

TEST

OSCI

VSS

GND

R1

C1

2

40

24

R4

R3

C4

VH

RST

VDD

CSB

SCK

SI

VDD

VSS

VDD

C3

ZD

5x8 dot matrix fluorescent display tube

VDD

RST Pin is Connected to External Resistor and Capacitor

Micro-

controller

AD1-2

S1-40

G1-24

VH

P1-2

VDD

LED

2

TEST

OSCI

VSS

GND

R1

C1

2

40

24

R4

R3

C4

VH

RST

VDD

CSB

SCK

SI

VDD

VSS

VDD

C3

C2

R2

ZD

5x8 dot matrix fluorescent display tube

VDD

Note:1.TheVDDvaluedependsonthepowersupplyvoltageofthemicrocontrollerused.Adjustthevaluesof

thecomponentsR2,R4,C2,C3andC4accordingtothepowersupplyvoltageused.

2.TheVHvaluedependsonthefluorescentdisplaytubeused.AdjustthevaluesofthecomponentsR3and

ZDaccordingtothepowersupplyvoltageused.

3.R1=120kW,C1=0.1μF.