User`s guide

Rev. 1.10 34 November 14, 2014 Rev. 1.10 35 November 14, 2014
HT66FW2230
Wireless Charger A/D Flash 8-Bit MCU
System Operation Modes
Therearesixdifferentmodesofoperationforthemicrocontroller,eachonewithitsownspecial
characteristicsandwhichcanbechosenaccordingtothespecicperformanceandpowerrequirements
oftheapplication.Therearetwomodesallowingnormaloperationofthemicrocontroller,the
NORMALModeandSLOWMode.Theremainingfourmodes,theSLEEP,IDLE0,IDLE1and
IDLE2ModeareusedwhenthemicrocontrollerCPUisswitchedofftoconservepower.
Operation
Mode
CPU
Register Setting
f
SYS
f
H
f
SUB
FHIDEN FSIDEN CKS2~CKS0
NORMAL On x x 000~110 f
H
~f
H
/64 On On
SLOW On x x 111 f
SUB
Off On
IDLE0 Off 0 1
000~110 Off
Off On
111 On
IDLE1 Off 1 1 x On On On
IDLE2 Off 1 0
000~110 On
On Off
111 Off
SLEEP Off 0 0 x Off Off On
Note:1.IntheIDLEmode,thesystemclockisturnedonwhenbitCKS[2:0]=000~110andFHIDEN=1.
2.IntheIDLEmode,thesystemclockisturnedonwhenbitCKS[2:0]=111andFSIDEN=1.
3.Insleepmode,theLIRCisturnedonsincetheWDTisenabled.
NORMAL Mode
Asthenamesuggeststhisisoneofthemainoperatingmodeswherethemicrocontrollerhasallof
itsfunctionsoperationalandwherethesystemclockisprovidedbyoneofthehighspeedoscillators.
Thismodeoperatesallowingthemicrocontrollertooperatenormallywithaclocksourcewillcome
fromoneofthehighspeedoscillators,eithertheHXTorHIRCoscillators.Althoughahighspeed
oscillatorisused,runningthemicrocontrolleratadividedclockratioreducestheoperatingcurrent.
SLOW Mode
Thisisalsoamodewherethemicrocontrolleroperatesnormallyalthoughnowwithaslowerspeed
clocksource.Theclocksourceusedwillbefromf
SUB
.Thef
SUB
isderivedfromLIRC.
SLEEP Mode
TheSLEEPModeisenteredwhenanHALTinstructionisexecutedandwhentheFHIDENand
FSIDENbitarelow.IntheSLEEPmodetheCPUwillbestopped.Howeverthef
SUB
clockstillcan
continuetooperatebecausetheWDTfunctionisalwaysenabled.
IDLE0 Mode
TheIDLE0ModeisenteredwhenanHALTinstructionisexecutedandwhentheFSIDENbitin
theSCCregisterishighandtheFHIDENbitintheSCCregisterislow.IntheIDLE0Modethe
CPUwillbeswitchedoffbutthelowspeedoscillatorwillbeturnedontodrivesomeperipheral
functions.
IDLE1 Mode
TheIDLE1ModeisenteredwhenanHALTinstructionisexecutedandwhentheFHIDENbitinthe
SCCregisterishighandtheFSIDENbitintheSCCregisterishigh.IntheIDLE1ModetheCPU
willbeswitchedoffbutboththehighandlowspeedoscillatorswillbeturnedontoprovideaclock
sourcetokeepsomeperipheralfunctionsoperational.