Holtek HT66F004 User Manual

Rev. 1.71 70 April 11, 2017 Rev. 1.71 71 April 11, 2017
HT66F002/HT66F0025/HT66F003/HT66F004
Cost-Effective A/D Flash MCU with EEPROM
HT66F002/HT66F0025/HT66F003/HT66F004
Cost-Effective A/D Flash MCU with EEPROM
Standard Type TM Register Description
OveralloperationoftheStandardTMiscontrolledusingseriesofregisters.Areadonlyregister
pairexiststostoretheinternalcounter10-bitvalue,whilearead/writeregisterpairexiststostore
theinternal10-bitCCRAvalue.Theremainingtworegistersarecontrolregisterswhichsetupthe
differentoperatingandcontrolmodesaswellasthreeCCRPbits.
Name Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
STM0C0 ST0PAU ST0CK2 ST0CK1 ST0CK0 ST0ON ST0RP2 ST0RP1 ST0RP0
STM0C1 ST0M1 ST0M0 ST0IO1 ST0IO0 ST0OC ST0POL ST0DPX ST0CCLR
STM0DL D7 D6 D5 D4 D3 D2 D1 D0
STM0DH — — — — — — D9 D8
STM0AL D7 D6 D5 D4 D3 D2 D1 D0
STM0AH — — — — — — D9 D8
10-bit Standard TM Register List
STM0C0 Register
Bit 7 6 5 4 3 2 1 0
Name ST0PAU ST0CK2 ST0CK1 ST0CK0 ST0ON ST0RP2 ST0RP1 ST0RP0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
POR 0 0 0 0 0 0 0 0
bit7 ST0PAU:STMCounterPauseControl
0:Run
1:Pause
Thecountercanbepausedbysettingthisbithigh.Clearingthebittozerorestoresnormal
counteroperation.WheninaPauseconditiontheSTMwillremainpoweredupandcontinueto
consumepower.Thecounterwillretainitsresidualvaluewhenthisbitchangesfromlowtohigh
andresumecountingfromthisvaluewhenthebitchangestoalowvalueagain.
bit6~4 ST0CK2~ST0CK0:SelectSTMCounterclock
000:f
SYS
/4
001:f
SYS
010:f
H
/16
011:f
H
/64
100:f
TBC
101:f
TBC
110:STCK0risingedgeclock
111:STCK0fallingedgeclock
ThesethreebitsareusedtoselecttheclocksourcefortheSTM.Theexternalpinclocksource
canbechosentobeactiveontherisingorfallingedge.Theclocksourcef
SYS
isthesystemclock,
whilef
H
andf
TBC
areotherinternalclocks,thedetailsofwhichcanbefoundintheoscillator
section.
bit3 ST0ON:STMCounterOn/OffControl
0:Off
1:On
Thisbitcontrolstheoverallon/offfunctionoftheSTM.Settingthebithighenablesthecounter
torun,clearingthebitdisablestheSTM.Clearingthisbittozerowillstopthecounterfrom
countingandturnofftheSTMwhichwillreduceitspowerconsumption.Whenthebitchanges
statefromlowtohightheinternalcountervaluewillberesettozero, howeverwhenthebit
changesfromhightolow,theinternalcounterwillretainitsresidualvalueuntilthebitreturns
highagain.IftheSTMisintheCompareMatchOutputModeorthePWMoutputModeor
SinglePulseOutputModethentheSTMoutputpinwillberesettoitsinitialcondition,as
speciedbytheST0OCbit,whentheST0ONbitchangesfromlowtohigh.

Holtek HT66F004 Specifications

General

Brand	Holtek
Model	HT66F004
Category	Control Unit
Language	English