HT66F002 datasheet(53/144 Pages) HOLTEK

53 / 144 page

Rev. 1.71

April 11, 2017

Rev. 1.71

April 11, 2017

HT66F002/HT66F0025/HT66F003/HT66F004

Cost-Effective A/D Flash MCU with EEPROM

HT66F002/HT66F0025/HT66F003/HT66F004

Cost-Effective A/D Flash MCU with EEPROM

Reset Initial Conditions

Thedifferenttypesofresetdescribedaffecttheresetflagsindifferentways.Theseflags,known

asPDFandTOarelocatedinthestatusregisterandarecontrolledbyvariousmicrocontroller

operations,suchastheSLEEPorIDLEModefunctionorWatchdogTimer.Theresetflagsare

showninthetable:

PDF

RESET Conditions

Power-on reset

LVR reset during NORMAL or SLOW Mode operation

WDT time-out reset during NORMAL or SLOW Mode operation

WDT time-out reset during IDLE or SLEEP Mode operation

Note:“u”standsforunchanged

Thefollowingtableindicatesthewayinwhichthevariouscomponentsofthemicrocontrollerare

affectedafterapower-onresetoccurs.

Item

Condition After RESET

Program Counter

Reset to zero

Interrupts

All interrupts will be disabled

WDT

Clear after reset, WDT begins counting

Timer Modules

Timer Modules will be turned off

Input/Output Ports

I/O ports will be setup as inputs and AN0~AN3 as A/D input pins

Stack Pointer

Stack Pointer will point to the top of the stack

HT66F002 Datasheet(PDF) 53 Page - Holtek Semiconductor Inc