HT45F4MA datasheet(38/145 Pages) HOLTEK

38 / 145 page

Rev. 1.20

De�e��e� 1�� 201�

Rev. 1.20

De�e��e� 1�� 201�

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

NORMAL Mode

Asthenamesuggeststhisisoneofthemainoperatingmodeswherethemicrocontrollerhasallof

itsfunctionsoperationalandwherethesystemclockisprovidedbythehighspeedoscillator.This

modeoperatesallowingthemicrocontrollertooperatenormallywithaclocksourcewillcomefrom

thehighspeedoscillator,HIRC.Thehighspeedoscillatorwillhoweverfirstbedividedbyaratio

rangingfrom1to64,theactualratiobeingselectedbytheCKS2~CKS0andHLCLKbitsinthe

SMODregister.Althoughahighspeedoscillatorisused,runningthemicrocontrolleratadivided

clockratioreducestheoperatingcurrent.

SLOW Mode

Thisisalsoamodewherethemicrocontrolleroperatesnormallyalthoughnowwithaslowerspeed

clocksource.TheclocksourceusedwillbefromfSUB.Runningthemicrocontrollerinthismode

allowsittorunwithmuchloweroperatingcurrents.IntheSLOWMode,thefHisoff.

SLEEP Mode

TheSLEEPModeisenteredwhenanHALTinstructionisexecutedandwhentheIDLENbitinthe

SMODregisterislow.IntheSLEEPmodetheCPUwillbestopped.HoweverthefSUBclockwill

continuetooperate.

IDLE0 Mode

TheIDLE0ModeisenteredwhenaHALTinstructionisexecutedandwhentheIDLENbitinthe

SMODregisterishighandtheFSYSONbitintheCTRLregisterislow.IntheIDLE0Modethe

systemoscillatorwillbeinhibitedfromdrivingtheCPU,thesystemoscillatorwillbestopped,the

lowfrequencyfSUBwillbeon.

IDLE1 Mode

TheIDLE1ModeisenteredwhenaHALTinstructionisexecutedandwhentheIDLENbitinthe

SMODregisterishighandtheFSYSONbitintheCTRLregisterishigh.IntheIDLE1Modethe

systemoscillatorwillbeinhibitedfromdrivingtheCPU,thesystemoscillatorwillcontinuetorun,

andthissystemoscillatormaybehighspeedorlowspeedsystemoscillator.IntheIDLE1Modethe

lowfrequencyfSUBwillbeon.

Note:IfLVDEN=1andtheSLEEPorIDLEmodeisentered,theLVDandbandgapfunctionswill

notbedisabled,andthefSUBclockwillbeforcedtobeenabled.

HT45F4MA Fiches technique(PDF) 38 Page - Holtek Semiconductor Inc