HT66F4530 datasheet(154/224 Pages) HOLTEK

154 / 224 page

Rev. 1.00

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Rev. 1.00

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HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

WhentheUARTisdisabled,itwillemptythebuffersoanycharacterremainingin

thebufferwillbediscarded.Inaddition,thevalueofthebaudratecounterwillbe

reset.IftheUARTisdisabled,allerrorandstatusflagswillbereset.AlsotheTXEN,

RXEN,TXBRK,RXIF,OERR,FERR,PERRandNFbitswillbecleared,whilethe

TIDLE,TXIFandRIDLEbitswillbeset.OthercontrolbitsinUCR1,UCR2and

BRGregisterswillremainunaffected.IftheUARTisactiveandtheUARTENbitis

cleared,allpendingtransmissionsandreceptionswillbeterminatedandthemodule

willberesetasdefinedabove.WhentheUARTisre-enabled,itwillrestartinthe

sameconfiguration.

Bit6

BNO:Numberofdatatransferbitsselection

0:8-bitdatatransfer

1:9-bitdatatransfer

Thisbitisusedtoselectthedatalengthformat,whichcanhaveachoiceofeither

8-bitor9-bitformat.Whenthisbitisequalto"1",a9-bitdatalengthformatwillbe

selected.Ifthebitisequalto"0",thenan8-bitdatalengthformatwillbeselected.If

9-bitdatalengthformatisselected,thenbitsRX8andTX8willbeusedtostorethe

9thbitofthereceivedandtransmitteddatarespectively.

Bit5

PREN:Parityfunctionenablecontrol

0:Parityfunctionisdisabled

1:Parityfunctionisenabled

Thisistheparityenablebit.Whenthisbitisequalto"1",theparityfunctionwillbe

enabled.Ifthebitisequalto"0",thentheparityfunctionwillbedisabled.Replacethe

mostsignificantbitpositionwithaparitybit.

Bit4

PRT:Paritytypeselectionbit

0:Evenparityforparitygenerator

1:Oddparityforparitygenerator

Thisbitistheparitytypeselectionbit.Whenthisbitisequalto"1",oddparitytype

willbeselected.Ifthebitisequalto"0",thenevenparitytypewillbeselected.

Bit3

STOPS:NumberofStopbitsselection

0:Onestopbitformatisused

1:Twostopbitsformatisused

Thisbitdeterminesifoneortwostopbitsaretobeused.Whenthisbitisequalto"1",

twostopbitsformatareused.Ifthisbitisequalto"0",thenonlyonestopbitformatis

used.

Bit2

TXBRK:Transmitbreakcharacter

0:Nobreakcharacteristransmitted

1:Breakcharacterstransmit

TheTXBRKbitistheTransmitBreakCharacterbit.Whenthisbitis"0",thereare

nobreakcharactersandtheTXpinoperatesnormally.Whenthebitis"1",thereare

transmitbreakcharactersandthetransmitterwillsendlogiczeros.Whenthisbitis

equalto"1",afterthebuffereddatahasbeentransmitted,thetransmitteroutputisheld

lowforaminimumofa13-bitlengthanduntiltheTXBRKbitisreset.

Bit1

RX8:Receivedatabit8for9-bitdatatransferformat(readonly)

Thisbitisonlyusedif9-bitdatatransfersareused,inwhichcasethisbitlocationwill

storethe9thbitofthereceiveddataknownasRX8.TheBNObitisusedtodetermine

whetherdatatransfersarein8-bitor9-bitformat.

Bit0

TX8:Transmitdatabit8for9-bitdatatransferformat(writeonly)

Thisbitisonlyusedif9-bitdatatransfersareused,inwhichcasethisbitlocation

willstorethe9thbitofthetransmitteddataknownasTX8.TheBNObitisusedto

determinewhetherdatatransfersarein8-bitor9-bitformat.

HT66F4530 数据表(PDF) 154 Page - Holtek Semiconductor Inc

HT66F4530 数据表(HTML) 154 Page - Holtek Semiconductor Inc

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