HT67F488 datasheet(24/171 Pages) HOLTEK

24 / 171 page

Rev. 1.60

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HT67F488/HT67F489

TinyPowerTM A/D Flash MCU with LCD & EEPROM

Duringtheprogrammingprocess,takingcontrolofthePA0andPA2I/Opinsfordataandclock

programmingpurposes.Theusermusttheretakecaretoensurethatnootheroutputsareconnected

tothesetwopins.

Wr it er _V DD

IC PD A

IC PC K

Wr it er _V SS

To o th er C ir cu it

PA2

VSS

PA 0

VD D

Wr it er C onne ct or

Si gnal s

M CU Pr og ra mm in g

Pi ns

Note:*mayberesistororcapacitor.Theresistanceof*mustbegreaterthan1korthecapacitance

of*mustbelessthan1nF.

On-Chip Debug Support – OCDS

ThereisanEVchipnamedHT67V489whichisusedtoemulatetheHT67F488/HT67F489series

ofdevices.TheHT67V489devicealsoprovidesthe“On-ChipDebug”functiontodebugthe

HT67F488/HT67F489seriesofdevicesduringdevelopmentprocess.Thedevices,HT67F488/

HT67F489andHT67V489,arealmostfunctionalcompatibleexceptthe“On-ChipDebug”function

andpackagetypes.UserscanusetheHT67V489devicetoemulatetheHT67F488/HT67F489

seriesofdevicesbehaviorsbyconnectingtheOCDSDAandOCDSCKpinstotheHoltekHT-

IDEdevelopmenttools.TheOCDSDApinistheOCDSData/Addressinput/outputpinwhilethe

OCDSCKpinistheOCDSclockinputpin.WhenusersusetheHT67V489EVchipfordebugging,

thecorrespondingpinfunctionssharedwiththeOCDSDAandOCDSCKpinsintheHT67F488/

HT67F489seriesofdeviceswillhavenoeffectintheHT67V489EVchip.However,thetwo

OCDSpinswhicharepin-sharedwiththeICPprogrammingpinsarestillusedastheFlashMemory

programmingpinsforICP.FormoredetailedOCDSinformation,refertothecorresponding

documentnamed“Holteke-Linkfor8-bitMCUOCDSUser’sGuide”.

Holtek e-Link Pins

EV Chip Pins

Pin Description

OCDSDA

On-chip De�ug Suppo�t Data/Add�ess input/output

OCDSCK

On-chip De�ug Suppo�t Clock input

VDD

Powe� Supply

VSS

G�ound

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