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HT46R068B Scheda tecnica(PDF) 86 Page - Holtek Semiconductor Inc

Il numero della parte HT46R068B
Spiegazioni elettronici  Enhanced A/D 8-Bit OTP MCU
Download  135 Pages
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Produttore elettronici  HOLTEK [Holtek Semiconductor Inc]
Homepage  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT46R068B Scheda tecnica(HTML) 86 Page - Holtek Semiconductor Inc

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HT46R068B/HT46R069B
Enhanced A/D 8-Bit OTP MCU
HT46R068B/HT46R069B
Enhanced A/D 8-Bit OTP MCU
Serial Interface Module – SIM
ThesedevicescontainaSerialInterfaceModule,whichincludesboththefourlineSPIinterfaceor
thetwolineI2Cinterfacetypes,toallowaneasymethodofcommunicationwithexternalperipheral
hardware.Havingrelativelysimplecommunicationprotocols,theseserialinterfacetypesallow
themicrocontrollertointerfacetoexternalSPIorI2Cbasedhardwaresuchassensors,Flashor
EEPROMmemory,etc.TheSIMinterfacepinsarepin-sharedwithotherI/OpinsthereforetheSIM
interfacefunctionmustfirstbeselectedusingaconfigurationoption.Asbothinterfacetypesshare
thesamepinsandregisters,thechoiceofwhethertheSPIorI2CtypeisusedismadeusingtheSIM
operatingmodecontrolbits,namedSIM2~SIM0,intheSIMC0register.Thesepull-highresistorsof
theSIMpin-sharedI/Oareselectedusingpull-highcontrolregisters,andalsoiftheSIMfunctionis
enabled.
SPI Interface
ThisSPIinterfacefunctionwhichispartoftheSerialInterfaceModule,shouldnotbeconfusedwith
theotherindependentSPIfunction,knownasSPIA,whichisdescribedinanothersectionofthis
datasheet.
TheSPIinterfaceisoftenusedtocommunicatewithexternalperipheraldevicessuchassensors,
FlashorEEPROMmemorydevicesetc.OriginallydevelopedbyMotorola,thefourlineSPI
interfaceisasynchronousserialdatainterfacethathasarelativelysimplecommunicationprotocol
simplifyingtheprogrammingrequirementswhencommunicatingwithexternalhardwaredevices.
Thecommunicationisfullduplexandoperatesasaslave/mastertype,wherethedevicecanbe
eithermasterorslave.AlthoughtheSPIinterfacespecificationcancontrolmultipleslavedevices
fromasinglemaster,butthisdeviceprovidedonlyoneSCSpin.Ifthemasterneedstocontrol
multipleslavedevicesfromasinglemaster,themastercanuseI/Opintoselecttheslavedevices.
• SPIInterfaceOperation
TheSPIinterfaceisafullduplexsynchronousserialdatalink.Itisafourlineinterfacewithpin
namesSDI,SDO,SCKandSCS.PinsSDIandSDOaretheSerialDataInputandSerialData
Outputlines,SCKistheSerialClocklineandSCSistheSlaveSelectline.AstheSPIinterface
pinsarepin-sharedwithnormalI/OpinsandwiththeI2Cfunctionpins,theSPIinterfacemust
firstbeenabledbyselectingtheSIMenableconfigurationoptionandsettingthecorrectbitsinthe
SIMC0andSIMC2registers.AftertheSPIconfigurationoptionhasbeenconfigureditcanalso
beadditionallydisabledorenabledusingtheSIMENbitintheSIMC0register.Communication
betweendevicesconnectedtotheSPIinterfaceiscarriedoutinaslave/mastermodewithalldata
transferinitiationsbeingimplementedbythemaster.TheMasteralsocontrolstheclocksignal.
AsthedeviceonlycontainsasingleSCSpinonlyoneslavedevicecanbeutilized.TheSCSpin
iscontrolledbysoftware,setCSENbitto"1"toenableSCSpinfunction,setCSENbitto"0"the
SCSpinwillbefloatingstate.
SP I M ast er
SP I Sl av e
SC K
SD O
SD I
SC S
SC K
SD I
SD O
SC S
SPI Master/Slave Connection


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