 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
HT66F0174 Datasheet(PDF) 41 Page - Holtek Semiconductor Inc |
|
|
|||||||||||||||||||||||||||||
HT66F0174 Datasheet(HTML) 41 Page - Holtek Semiconductor Inc |
|
|
41 / 115 page  Rev. 1.00 40 ���� 11� �01� Rev. 1.00 41 ���� 11� �01� HT66F0172/HT66F0174 Enhanced A/D Flash 8-Bit MCU WhentheHLCLKbitswitchestoalowlevel,whichimpliesthatclocksourceisswitchedfromthe highspeedclocksource,fH,totheclocksource,fH/2~fH/64orfL.IftheclockisfromthefL,thehigh speedclocksourcewillstoprunningtoconservepower.Whenthishappensitmustbenotedthatthe fH/16andfH/64internalclocksourceswillalsostoprunning,whichmayaffecttheoperationofother internalfunctionssuchastheTMs.Theaccompanyingflowchartshowswhathappenswhenthe devicemovesbetweenthevariousoperatingmodes. SL E EP0 HA LT i ns tr uc ti on i s ex ec ut ed f SYS of f CP U st op ID LE N= 0 f TB C of f f SU B of f WD T & L VD o ff NO RM AL f SYS =f H ~f H /6 4 f H o n CP U ru n f SYS o n f TB C o n f SU B o n ID LE 1 HA LT i ns tr uc ti on i s ex ec ut ed CP U st op ID LE N= 1 FS YS ON =1 f SYS o n f TB C o n f SU B on ID LE 0 HA LT i ns tr uc ti on i s ex ec ut ed CP U st op ID LE N= 1 FS YS ON =0 f SYS o ff f TB C o n f SU B o n SL OW f SYS =f L f L o n CP U ru n f SYS o n f TB C o n f SU B o n f H o ff SL E EP1 HA LT i ns tr uc ti on i s ex ec ut ed f SYS o ff CP U st op ID LE N= 0 f TB C o ff f SU B o n WD T or L VD o n NORMAL Mode to SLOW Mode Switching WhenrunningintheNORMALMode,whichusesthehighspeedsystemoscillator,andtherefore consumesmorepower,thesystemclockcanswitchtorunintheSLOWModebysettingthe HLCLKbitto"0"andsettingtheCKS2~CKS0bitsto"000"or"001"intheSMODregister.This willthenusethelowspeedsystemoscillatorwhichwillconsumelesspower.Usersmaydecideto dothisforcertainoperationswhichdonotrequirehighperformanceandcansubsequentlyreduce powerconsumption. TheSLOWModeissourcedfromtheLIRCortheLXToscillatorandthereforerequiresthese oscillatorstobestablebeforefullmodeswitchingoccurs.ThisismonitoredusingtheLTObitinthe SMODregister. SLOW Mode to NORMAL Mode Switching InSLOWModethesystemuseseithertheLXTorLIRClowspeedsystemoscillator.Toswitch backtotheNORMALMode,wherethehighspeedsystemoscillatorisused,theHLCLKbitshould besetto"1"orHLCLKbitis"0",butCKS2~CKS0issetto"010","011","100","101","110"or "111".Asacertainamountoftimewillberequiredforthehighfrequencyclocktostabilise,the statusoftheHTObitischecked.Theamountoftimerequiredforhighspeedsystemoscillator stabilizationdependsuponwhichhighspeedsystemoscillatortypeisused. |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
