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HT45F4M Datasheet(PDF) 73 Page - Holtek Semiconductor Inc |
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HT45F4M Datasheet(HTML) 73 Page - Holtek Semiconductor Inc |
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73 / 138 page  Rev. 1.10 7� �an�a�� 1�� �01� Rev. 1.10 7� �an�a�� 1�� �01� HT45F4M Lithium Battery Backup Power ASSP MCU HT45F4M Lithium Battery Backup Power ASSP MCU Name Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 TM1C0 T1PAU T1CK� T1CK1 T1CK0 T1ON — — — TM1C1 T1M1 T1M0 T1IO1 T1IO0 T1OC T1POL T1CAPTS T1CCLR TM1DL D7 D6 D� D4 D� D� D1 D0 TM1DH — — — — — — D9 D8 TM1AL D7 D6 D� D4 D� D� D1 D0 TM1AH — — — — — — D9 D8 TM1RPL D7 D6 D� D4 D� D� D1 D0 TM1RPH — — — — — — D9 D8 10-bit Periodic TM Register List TM1C0 Register Bit 7 6 5 4 3 2 1 0 Name T1PAU T1CK� T1CK1 T1CK0 T1ON — — — R/W R/W R/W R/W R/W R/W — — — POR 0 0 0 0 0 — — — Bit7 T1PAU:TM1CounterPauseControl 0:run 1:pause Thecountercanbepausedbysettingthisbithigh.Clearingthebittozerorestores normalcounteroperation.WheninaPauseconditiontheTMwillremainpoweredup andcontinuetoconsumepower.Thecounterwillretainitsresidualvaluewhenthisbit changesfromlowtohighandresumecountingfromthisvaluewhenthebitchanges toalowvalueagain. Bit6~4 T1CK2 ~ T1CK0:SelectTM1Counterclock 000:fSYS/4 001:fSYS 010:fH/16 011:fH/64 100:fTBC 101:fH 110:TCK1risingedgeclock 111:TCK1fallingedgeclock ThesethreebitsareusedtoselecttheclocksourcefortheTM.Theexternalpinclock sourcecanbechosentobeactiveontherisingorfallingedge.TheclocksourcefSYSis thesystemclock,whilefHandfTBCareotherinternalclocks,thedetailsofwhichcan befoundintheoscillatorsection. Bit3 T1ON:TM1CounterOn/OffControl 0:Off 1:On Thisbitcontrolstheoverallon/offfunctionoftheTM.Settingthebithighenablesthe countertorun,clearingthebitdisablestheTM.Clearingthisbittozerowillstopthe counterfromcountingandturnofftheTMwhichwillreduceitspowerconsumption. Whenthebitchangesstatefromlowtohightheinternalcountervaluewillberesetto zero,howeverwhenthebitchangesfromhightolow,theinternalcounterwillretain itsresidualvalueuntilthebitreturnshighagain. IftheTMisintheCompareMatchOutputModethentheTMoutputpinwillbereset toitsinitialcondition,asspecifiedbytheTMOutputcontrolbit,whenthebitchanges fromlowtohigh. Bit2~0 “—”Unimplemented,readas0 |
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