HT67F2390 datasheet(44/292 Pages) HOLTEK

44 / 292 page

Rev. 1.00

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Rev. 1.00

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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

Operating Frequency Characteristic Curves

System Operating Frequency

Operating Voltage

8MHz

12MHz

16MHz

2.2V

2.7V

3.3V

5.5V

System Start Up Time Characteristics

Ta= -40°C ~ 85°C

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

VDD

Conditions

tSST

Syste� Sta�t-up Ti�e

Wake-up f�o� Condition whe�e fSYS is off

—

fSYS=fH ~ fH/�4� fH=fHXT

—

1�8

—

tHXT

fSYS=fH ~ fH/�4� fH=fHIRC

—

1�

—

tHIRC

fSYS=fSUB=fLXT

— 10�4 —

tLXT

fSYS=fSUB=fLIRC

—

�

—

tLIRC

Syste� Sta�t-up Ti�e

Wake-up f�o� Condition whe�e fSYS is on

—

fSYS=fH ~ fH/�4� fH=fHXT o� fHIRC

—

�

—

fSYS=fSUB=fLXT o� fLIRC

—

�

—

tSUB

Syste� Speed Swit�h Ti�e

FAST to Slow Mode o� SLOW to FAST

Mode

—

fHXT switches from off → on

— 10�4 —

tHXT

fHIRC switches from off → on

—

1�

—

tHIRC

fLXT switches from off → on

— 10�4 —

tLXT

tRSTD

Syste� Reset Delay Ti�e

Reset Sou��e f�o� Powe�-on Reset o�

LVR Ha�dwa�e Reset

— RRPOR=5V/�s

4�

�s

Syste� Reset Delay Ti�e

LVRC/WDTC/RSTC Softwa�e Reset

—

Syste� Reset Delay Ti�e

Reset Source from WDT Overflow

o� Reset pin �eset

—

1�

Notes:1.FortheSystemStart-uptimevalues,whetherfSYSisonoroffdependsuponthemodetypeandthe

chosenfSYSsystemoscillator.DetailsareprovidedintheSystemOperatingModessection.

2.Thetimeunits,shownbythesymbolstHXT,tHIRCetc.aretheinverseofthecorrespondingfrequency

valuesasprovidedinthefrequencytables.ForexampletHIRC=1/fHIRC,tSYS=1/fSYSetc.

3.IftheLIRCisusedasthesystemclockandifitisoffwhenintheSLEEPMode,thenanadditional

LIRCstartuptime,tSTART,asprovidedintheLIRCfrequencytable,mustbeaddedtothetSSTtimeinthe

tableabove.

4.TheSystemSpeedSwitchTimeiseffectivelythetimetakenforthenewlyactivatedoscillatortostartup.

HT67F2390 Datasheet(PDF) 44 Page - Holtek Semiconductor Inc

HT67F2390 Datasheet(HTML) 44 Page - Holtek Semiconductor Inc

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