HT66F4530 datasheet(140/224 Pages) HOLTEK

140 / 224 page

Rev. 1.00

140

De�e��e� �1� �01�

Rev. 1.00

141

De�e��e� �1� �01�

HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

I2C Interface

TheI2Cinterfaceisusedtocommunicatewithexternalperipheraldevicessuchassensors,

EEPROMmemoryetc.OriginallydevelopedbyPhilips,itisatwolinelowspeedserialinterface

forsynchronousserialdatatransfer.Theadvantageofonlytwolinesforcommunication,relatively

simplecommunicationprotocolandtheabilitytoaccommodatemultipledevicesonthesamebus

hasmadeitanextremelypopularinterfacetypeformanyapplications.

Devi�e

Slave

Devi�e

Maste�

Devi�e

Slave

VDD

SDA

SCL

I2C Master Slave Bus Connection

I2C Interface Operation

TheI2Cserialinterfaceisatwolineinterface,aserialdataline,SDA,andserialclockline,SCL.As

manydevicesmaybeconnectedtogetheronthesamebus,theiroutputsarebothopendraintypes.

Forthisreasonitisnecessarythatexternalpull-highresistorsareconnectedtotheseoutputs.Note

thatnochipselectlineexists,aseachdeviceontheI2Cbusisidentifiedbyauniqueaddresswhich

willbetransmittedandreceivedontheI2Cbus.

WhentwodevicescommunicatewitheachotheronthebidirectionalI2Cbus,oneisknownasthe

masterdeviceandoneastheslavedevice.Bothmasterandslavecantransmitandreceivedata,

however,itisthemasterdevicethathasoverallcontrolofthebus.Forthesedevices,whichonly

operateinslavemode,therearetwomethodsoftransferringdataontheI2Cbus,theslavetransmit

modeandtheslavereceivemode.

Shift Registe�

T�ans�it/

Re�eive

Cont�ol Unit

fSYS

fSUB

Data Bus

I�C Add�ess Registe�

(SIMA)

I�C Data Registe�

(SIMD)

Add�ess

Co�pa�ato�

Read/W�ite Slave

SRW

Dete�t Sta�t o� Stop

HBB

Ti�e-out

Cont�ol

SIMTOF

Add�ess Mat�h–

HAAS

I�C Inte��upt

De�oun�e

Ci��uit�y

SCL Pin

TXAK

Data out MSB

SIMTOEN

Add�ess Mat�h

SIMDEB[1:0]

SDA Pin

Data in MSB

Di�e�tion Cont�ol

HTX

8-�it Data T�ansfe� Co�plete–

HCF

I2C Block Diagram

HT66F4530 Datasheet(PDF) 140 Page - Holtek Semiconductor Inc

HT66F4530 Datasheet(HTML) 140 Page - Holtek Semiconductor Inc

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