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HT67F2390 Datasheet(PDF) 87 Page - Holtek Semiconductor Inc

Part # HT67F2390
Description  Advanced A/D Flash MCU with LCD & EEPROM
PDF  292 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT67F2390 Datasheet(HTML) 87 Page - Holtek Semiconductor Inc

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Rev. 1.00
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Rev. 1.00
87
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HT67F2350/HT67F2360
HT67F2370/HT67F2390
Advanced A/D Flash MCU with LCD & EEPROM
HT67F2350/HT67F2360
HT67F2370/HT67F2390
Advanced A/D Flash MCU with LCD & EEPROM
System Operation Modes
Therearesixdifferentmodesofoperationforthemicrocontroller,eachonewithitsown
specialcharacteristicsandwhichcanbechosenaccordingtothespecificperformanceand
powerrequirementsoftheapplication.Therearetwomodesallowingnormaloperationofthe
microcontroller,theFASTModeandSLOWMode.Theremainingfourmodes,theSLEEP,IDLE0,
IDLE1andIDLE2ModeareusedwhenthemicrocontrollerCPUisswitchedofftoconservepower.
Operation
Mode
CPU
Register Setting
fSYS
fH
fSUB
fLIRC
FHIDEN FSIDEN CKS2~CKS0
FAST
On
x
x
000~110
fH~fH/�4
On
On
On
SLOW
On
x
x
111
fSUB
On/Off
(1)
On
On
IDLE0
Off
0
1
000~110
Off
Off
On
On
111
On
IDLE1
Off
1
1
xxx
On
On
On
On
IDLE�
Off
1
0
000~110
On
On
Off
On
111
Off
SLEEP
Off
0
0
xxx
Off
Off
Off
On
(�)
Note:1.ThefHclockwillbeswitchedonoroffbyconfiguringthecorrespondingoscillatorenable
bitintheSLOWmode.
2.ThefLIRCclockwillbeswitchedoniftheWDTfunctionisenabled.
FAST Mode
Asthenamesuggeststhisisoneofthemainoperatingmodeswherethemicrocontrollerhasallof
itsfunctionsoperationalandwherethesystemclockisprovidedbyoneofthehighspeedoscillators.
Thismodeoperatesallowingthemicrocontrollertooperatenormallywithaclocksourcewillcome
fromoneofthehighspeedoscillators,eithertheHXTorHIRCoscillators.Thehighspeedoscillator
willhoweverfirstbedividedbyaratiorangingfrom1to64,theactualratiobeingselectedby
theCKS2~CKS0bitsintheSCCregister.Althoughahighspeedoscillatorisused,runningthe
microcontrolleratadividedclockratioreducestheoperatingcurrent.
SLOW Mode
Thisisalsoamodewherethemicrocontrolleroperatesnormallyalthoughnowwithaslowerspeed
clocksource.TheclocksourceusedwillbefromfSUB.ThefSUBclockisderivedfromeitherthe
LIRCorLXToscillator.
SLEEP Mode
TheSLEEPModeisenteredwhenanHALTinstructionisexecutedandwhentheFHIDENand
FSIDENbitarelow.IntheSLEEPmodetheCPUwillbestoppedandboththehighandlowspeed
oscillatorswillbeswitchedoff.HoweverthefLIRCclockwillcontinuetooperateiftheWDTfunction
isenabledbytheWDTCregister.
IDLE0 Mode
TheIDLE0ModeisenteredwhenanHALTinstructionisexecutedandwhentheFHIDENbitin
theSCCregisterislowandtheFSIDENbitintheSCCregisterishigh.IntheIDLE0Modethe
CPUwillbeswitchedoffbutthelowspeedoscillatorwillbeturnedontodrivesomeperipheral
functions.



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