HT67F488 datasheet(84/171 Pages) HOLTEK

84 / 171 page

Rev. 1.60

�ove��e� �� 016

HT67F488/HT67F489

TinyPowerTM A/D Flash MCU with LCD & EEPROM

IntheCompareMatchOutputMode,theTnIO1andTnIO0bitsdeterminehowthe

TMoutputpinchangesstatewhenacomparematchoccursfromtheComparatorA.

TheTMoutputpincanbesetuptoswitchhigh,switchlowortotoggleitspresent

statewhenacomparematchoccursfromtheComparatorA.Whenthebitsareboth

zero,thennochangewilltakeplaceontheoutput.TheinitialvalueoftheTMoutput

pinshouldbesetupusingtheTnOCbitintheTMnC1register.Notethattheoutput

levelrequestedbytheTnIO1andTnIO0bitsmustbedifferentfromtheinitialvalue

setupusingtheTnOCbitotherwisenochangewilloccurontheTMoutputpinwhen

acomparematchoccurs.AftertheTMoutputpinchangesstate,itcanberesettoits

initiallevelbychangingtheleveloftheTnONbitfromlowtohigh.

InthePWMOutputMode,theTnIO1andTnIO0bitsdeterminehowtheTMoutput

pinchangesstatewhenacertaincomparematchconditionoccurs.ThePWMoutput

functionismodifiedbychangingthesetwobits.Itisnecessarytoonlychangethe

valuesoftheTnIO1andTnIO0bitsonlyaftertheTMnhasbeenswitchedoff.

UnpredictablePWMoutputswilloccuriftheTnIO1andTnIO0bitsarechangedwhen

theTMisrunning.

Bit3

TnOC:TPnOutputcontrolbit

CompareMatchOutputMode

0:Initiallow

1:Initialhigh

PWMOutputMode

0:Activelow

1:Activehigh

ThisistheoutputcontrolbitfortheTMoutputpin.Itsoperationdependsupon

whetherTMisbeingusedintheCompareMatchOutputModeorinthePWMOutput

Mode.IthasnoeffectiftheTMisintheTimer/CounterMode.IntheCompareMatch

OutputModeitdeterminesthelogicleveloftheTMoutputpinbeforeacompare

matchoccurs.InthePWMOutputModeitdeterminesifthePWMsignalisactive

highoractivelow.

Bit2

TnPOL:TPnOutputpolarityControl

0:Non-invert

1:Invert

ThisbitcontrolsthepolarityoftheTPnoutputpin.WhenthebitissethightheTM

outputpinwillbeinvertedandnotinvertedwhenthebitiszero.Ithasnoeffectifthe

TMisintheTimer/CounterMode.

Bit1

TnDPX:TMnPWMperiod/dutyControl

0:CCRP-period;CCRA-duty

1:CCRP-duty;CCRA-period

Thisbit,determineswhichoftheCCRAandCCRPregistersareusedforperiodand

dutycontrolofthePWMwaveform.

Bit0

TnCCLR:SelectTMnCounterclearcondition

0:TMnComparatrorPmatch

1:TMnComparatrorAmatch

Thisbitisusedtoselectthemethodwhichclearsthecounter.Rememberthatthe

CompactTMcontainstwocomparators,ComparatorAandComparatorP,eitherof

whichcanbeselectedtocleartheinternalcounter.WiththeTnCCLRbitsethigh,

thecounterwillbeclearedwhenacomparematchoccursfromtheComparatorA.

Whenthebitislow,thecounterwillbeclearedwhenacomparematchoccursfrom

theComparatorPorwithacounteroverflow.Acounteroverflowclearingmethodcan

onlybeimplementediftheCCRPbitsareallclearedtozero.TheTnCCLRbitisnot

usedinthePWMOutputMode.

HT67F488 bảng dữ liệu(PDF) 84 Page - Holtek Semiconductor Inc

HT67F488 bảng dữ liệu(HTML) 84 Page - Holtek Semiconductor Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL