HT16528 datasheet(3/40 Pages) HOLTEK

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PinDescription

PinName

I/O

Description

LogicSystem(MicroprocessorInterface)

RS, ST

When parallel mode is selected, this pin is utilized to select the register, either Instruction Reg-

isterorDataRegister.

0:IR(InstructionRegister)

1: DR (DataRegister)

When serial mode is selected, this pin performs strobe input. Data can be set as input when this

signalgoes0.

Duringthenextrisingedgeofthissignal,commandprocessingisperformed.

E(RD),

SCK

When M68 parallel mode is selected (E), this pin is write enable. Writes data at the falling edge.

When i80 parallel mode is selected (RD), this pin is read enable. When this pin is

²Low², data is

outputtothedataBus.

When Serial mode is selected, this pin is shift clock input, data will be written at the rising edge.

Whenthispinis

²Low²,thedeviceisactive.

OSCI

OSCO

Connectedtoanexternalresistortogenerateanoscillationfrequency.

XOUT

Oscillatorsignaloutputpin

R,W(WR)

WhenM68parallelmodeisselected(R,W),thispinisdatamodeselectpin

(0:write,1:read).

When i80 parallel mode is selected (WR), this pin is a write enable pin. Data will be written at

risingedgesignal.

Whenserialmodeisselected,connectthispinto

²Hi² or ²Low².ReadorWriteischosenby

instruction.

SI,SO

I/O

Whenserialmodeisselected,thispinisusedasI/Opin.

Whenparallelmodeisselected,thispinneedstobeconnectedto

²Hi² or ²Low².

DB0~DB7

I/O

Whenparallelmodeisselected,thesepinsareusedasI/Opins.

Dataarestoredsequentially,thefirstbitwhichissenttotheHT16528isMSB.

If4bitsmodeisselected,onlyDB4~DB7areused.

RESET

Initializealltheinternalregisterandcommands.

Allsegmentsanddigitsarefixed PGND.

DS0,DS1

Setthedutyratio.Dutyratiowilldeterminethenumberofgrid.

TherelationshipbetweendutyratioandthesepinsisshowninTable1-1.

Selectinterfacemode(parallelmodeorserialmode)

0:Serialmode

1:Parallelmode

Inparallelmode,instructionwilldeterminethelengthofword.

MPU

Selectinterfacemode(i80typeCPUmodeorM68typeCPUmode)

0:i80typeCPUmode

1:M68typeCPUmode

DLS

SelectnumberofdisplaylinewhenpowerONresetorresetting.

0:Select1line(N=0),

²N² isdisplaylineselectflaginFunctionsetcommand.

1:Select2line(N=1)

RL1,RL2

Setsegmentoutputspinassignment.TheselectiontableislistedasTable1-2&Table1-7

TESTI

0oropen:Normaloperationmode

1:Testmode

TESTO

ForICtestingonly,leavethispinopen.

LogicSystem(ToExternalExtensionDriver)

SDO

Serialdataoutputforextensiondigitdriver.

SLK

Shiftclockpulseforextensiondigitdriver.

Activeduringrisingedge

HT16528

Rev.1.10

July5,2011

HT16528 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

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