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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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HT66F4530 数据表(PDF) 61 Page - Holtek Semiconductor Inc |
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HT66F4530 数据表(HTML) 61 Page - Holtek Semiconductor Inc |
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61 / 224 page  Rev. 1.00 �0 De�e��e� �1� �01� Rev. 1.00 �1 De�e��e� �1� �01� HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers SLOW Mode to FAST Mode Switching InSLOWmodethesystemclockisderivedfromfSUB.Whensystemclockisswitchedbacktothe FASTmodefromfSUB,theCKS2~CKS0bitsshouldbesetto"000"~"110"andthenthesystemclock willrespectivelybeswitchedtofH~fH/64. However,iffHisnotusedinSLOWmodeandthusswitchedoff,itwilltakesometimetore- oscillateandstabilisewhenswitchingtotheFASTmodefromtheSLOWMode.Thisismonitored usingtheHXTFbitintheHXTCregisterortheHIRCFbitintheHIRCCregister.Thetimeduration requiredforthehighspeedsystemoscillatorstabilizationisspecifiedintheSystemStartUpTime Characteristics. FAST Mode SLOW Mode CKS�~CKS0 = 000~110 SLEEP Mode FHIDEN=0� FSIDEN=0 HALT inst�u�tion is exe�uted IDLE0 Mode FHIDEN=0� FSIDEN=1 HALT inst�u�tion is exe�uted IDLE1 Mode FHIDEN=1� FSIDEN=1 HALT inst�u�tion is exe�uted IDLE2 Mode FHIDEN=1� FSIDEN=0 HALT inst�u�tion is exe�uted Entering the SLEEP Mode ThereisonlyonewayforthesedevicestoentertheSLEEPModeandthatistoexecutethe"HALT" instructionintheapplicationprogramwithboththeFHIDENandFSIDENbitsintheSCCregister equalto"0".InthismodealltheclocksandfunctionswillbeswitchedoffexcepttheWDTfunction. Whenthisinstructionisexecutedundertheconditionsdescribedabove,thefollowingwilloccur: • Thesystemclockwillbestoppedandtheapplicationprogramwillstopatthe"HALT" instruction. • TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition. • TheI/Oportswillmaintaintheirpresentconditions. • Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO, willbecleared. • TheWDTwillbeclearedandresumecountingiftheWDTfunctionisenabled.IftheWDT functionisdisabled,theWDTwillbeclearedandthenstopped. |
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