HT68F003 datasheet(34/119 Pages) HOLTEK

34 / 119 page

Rev. 1.41

April 11, 2017

Rev. 1.41

April 11, 2017

HT68F002/HT68F0025/HT68F003

Cost-Effective Flash MCU with EEPROM

HT68F002/HT68F0025/HT68F003

Cost-Effective Flash MCU with EEPROM

HIRC

Prescaler

LIRC

Low Speed Oscillator

fH/2

fH/16

fH/64

fH/8

fH/4

fH/32

HLCLK

CKS2~CKS0 bits

fSYS

fLIRC

High Speed Oscillator

WDT

fSYS/4

fTB

Time Base 0

Time Base 1

TBCK

fTBC

IDLEN

System Clock Configurations

Note:WhenthesystemclocksourcefSYSisswitchedtofLfromfH,thehighspeedoscillationwill

stoptoconservethepower.ThusthereisnofH~fH/64forperipheralcircuittouse.

System Operation Modes

Therearesixdifferentmodesofoperationforthemicrocontroller,eachonewithitsown

specialcharacteristicsandwhichcanbechosenaccordingtothespecificperformanceand

powerrequirementsoftheapplication.Therearetwomodesallowingnormaloperationofthe

microcontroller,theNORMALModeandSLOWMode.Theremainingfourmodes,theSLEEP0,

SLEEP1,IDLE0andIDLE1modesareusedwhenthemicrocontrollerCPUisswitchedoffto

conservepower.

Operating

Mode

Description

CPU

fSYS

fLIRC

fTBC

NORMAL mode

fH~fH/64

SLOW mode

IDLE0 mode

Off

IDLE1 mode

Off

SLEEP0 mode

Off

SLEEP1 mode

Off

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