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HT66F20 Datasheet(PDF) 146 Page - Holtek Semiconductor Inc |
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HT66F20 Datasheet(HTML) 146 Page - Holtek Semiconductor Inc |
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146 / 298 page  Rev. 1.90 146 �e���a�� 18� �01� Rev. 1.90 147 �e���a�� 18� �01� HT66F20/HT66F30/HT66F40/HT66F50/HT66F60 HT66FU30/HT66FU40/HT66FU50/HT66FU60 Enhanced A/D Flash Type 8-Bit MCU with EEPROM HT66F20/HT66F30/HT66F40/HT66F50/HT66F60 HT66FU30/HT66FU40/HT66FU50/HT66FU60 Enhanced A/D Flash Type 8-Bit MCU with EEPROM Enhanced TM Operation Atitscoreisa10-bitcount-up/count-downcounterwhichisdrivenbyauserselectableinternal orexternalclocksource.Therearethreeinternalcomparatorswiththenames,ComparatorA, ComparatorBandComparatorP.Thesecomparatorswillcomparethevalueinthecounterwiththe CCRA,CCRBandCCRPregisters.TheCCRPcomparatoris3-bitswidewhosevalueiscompared withthehighest3-bitsinthecounterwhileCCRAandCCRBare10-bitswideandtherefore comparedwithallcounterbits. Theonlywayofchangingthevalueofthe10-bitcounterusingtheapplicationprogram,isto clearthecounterbychangingtheTnONbitfromlowtohigh.Thecounterwillalsobecleared automaticallybyacounteroverfloworacomparematchwithoneofitsassociatedcomparators. Whentheseconditionsoccur,aTMinterruptsignalwillalsousuallybegenerated.TheEnhanced TypeTMcanoperateinanumberofdifferentoperationalmodes,canbedrivenbydifferentclock sourcesincludinganinputpinandcanalsocontroloutputpins.Alloperatingsetupconditionsare selectedusingrelevantinternalregisters. Enhanced Type TM Register Description OveralloperationoftheEnhancedTMiscontrolledusingaseriesofregisters.Areadonlyregister pairexiststostoretheinternalcounter10-bitvalue,whiletworead/writeregisterpairsexisttostore theinternal10-bitCCRAandCCRBvalue.Theremainingthreeregistersarecontrolregisterswhich setupthedifferentoperatingandcontrolmodesaswellasthethreeCCRPbits. Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 TM1C0 T1PAU T1CK� T1CK1 T1CK0 T1ON T1RP� T1RP1 T1RP0 TM1C1 T1AM1 T1AM0 T1AIO1 T1AIO0 T1AOC T1APOL T1CDN T1CCLR TM1C� T1BM1 T1BM0 T1BIO1 T1BIO0 T1BOC T1BPOL T1PWM1 T1PWM0 TM1DL D7 D6 D5 D4 D� D� D1 D0 TM1DH — — — — — — D9 D8 TM1AL D7 D6 D5 D4 D� D� D1 D0 TM1AH — — — — — — D9 D8 TM1BL D7 D6 D5 D4 D� D� D1 D0 TM1BH — — — — — — D9 D8 10-bit Enhanced TM Register List (if ETM is TM1) |
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