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HT69F2562 Datasheet(PDF) 57 Page - Holtek Semiconductor Inc |
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HT69F2562 Datasheet(HTML) 57 Page - Holtek Semiconductor Inc |
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57 / 194 page  Rev. 1.00 5� �an�a�� ��� �01� Rev. 1.00 57 �an�a�� ��� �01� HT69F2562 Ultra-Low Power Flash MCU with LCD & EEPROM HT69F2562 Ultra-Low Power Flash MCU with LCD & EEPROM • SCC Register Bit 7 6 5 4 3 2 1 0 Name CKS� CKS1 CKS0 — — — FHIDEN FSIDEN R/W R/W R/W R/W — — — R/W R/W POR 0 0 1 — — — 0 0 Bit7~5 CKS2~CKS0:Systemclockselection 000:fH 001:fH/2 010:fH/4 011:fH/8 100:fH/16 101:fH/32 110:fH/64 111:fSUB Thesethreebitsareusedtoselectwhichclockisusedasthesystemclocksource.In additiontothesystemclocksourcedirectlyderivedfromfHorfSUB,adividedversion ofthehighspeedsystemoscillatorcanalsobechosenasthesystemclocksource. Bit4~2 Unimplemented,readas“0” Bit1 FHIDEN:HighFrequencyoscillatorcontrolwhenCPUisswitchedoff 0:Disable 1:Enable Thisbitisusedtocontrolwhetherthehighspeedoscillatorisactivatedorstopped whentheCPUisswitchedoffbyexecutingan“HALT”instruction. Bit0 FSIDEN:LowFrequencyoscillatorcontrolwhenCPUisswitchedoff 0:Disable 1:Enable Thisbitisusedtocontrolwhetherthelowspeedoscillatorisactivatedorstopped whentheCPUisswitchedoffbyexecutingan“HALT”instruction. • HIRCC Register Bit 7 6 5 4 3 2 1 0 Name — — — — HIRC1 HIRC0 HIRCF HIRCEN R/W — — — — R/W R/W R R/W POR — — — — 0 0 0 1 Bit7~4 Unimplemented,readas“0” Bit3~2 HIRC1~HIRC0:HIRCFrequencyselection 00:4MHz 01:8MHz 10:12MHz 11:4MHz WhentheHIRCoscillatorisenabledortheHIRCfrequencyselectionischanged byapplicationprogram,theclockfrequencywillautomaticallybechangedafterthe HIRCFflagissetto1. ItisrecommendedthattheHIRCfrequencyselectedbythesetwobitsshouldbethe samewiththefrequencydeterminedbytheconfigurationoptionstoachievetheHIRC frequencyaccuracyspecifiedintheA.C.Characteristics. Bit1 HIRCF:HIRCoscillatorstableflag 0:HIRCunstable 1:HIRCstable ThisbitisusedtoindicatewhethertheHIRCoscillatorisstableornot.Whenthe HIRCENbitissetto1toenabletheHIRCoscillatorortheHIRCfrequencyselection ischangedbyapplicationprogram,theHIRCFbitwillfirstbeclearedto0andthen setto1aftertheHIRCoscillatorisstable. |
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