HT66F302 datasheet(9/129 Pages) HOLTEK

9 / 129 page

Rev. 1.11

April 11, 2017

Rev. 1.11

April 11, 2017

HT66F302/HT66F303

Cost-Effective Flash MCU with EEPROM

HT66F302/HT66F303

Cost-Effective Flash MCU with EEPROM

Pin Description

Withtheexceptionofthepowerpinsandsomerelevanttransformercontrolpins,allpinsonthe

devicecanbereferencedbytheirPortname,e.g.PA0,PA1etc,whichrefertothedigitalI/O

functionofthepins.HoweverthesePortpinsarealsosharedwithotherfunctionsuchastheAnalog

toDigitalConverter,TimerModulepinsetc.Thefunctionofeachpinislistedinthefollowingtable,

howeverthedetailsbehindhoweachpinisconfigurediscontainedinothersectionsofthedatasheet.

HT66F302

Pin Name

Function OPT

I/T

O/T

Description

PA0/[STPI]/

AN0/ICPDA

PA0

PAWU

PAPU

PASR

CMOS General purpose I/O. Register enabled pull-high and

wake-up.

STPI

PASR

IFS0

—

STM input

AN0

PASR

—

ADC input channel 0

ICPDA

—

CMOS ICP Address/Data

PA1/AN1/VREFI

PA1

PAWU

PAPU

PASR

CMOS General purpose I/O. Register enabled pull-high and

wake-up.

AN1

PASR

—

ADC input channel 1

VREFI

PASR

—

ADC VREF Input

PA2/[INT]/[STCK]/

AN2/ICPCK

PA2

PAWU

PAPU

PASR

CMOS General purpose I/O. Register enabled pull-high and

wake-up

INT

PASR

IFS0

—

External interrupt input

STCK

IFS0

—

STM clock input

AN2

PASR

—

ADC input channel 2

ICPCK

—

ICP Clock pin

PA3/INT/STCK/AN3

PA3

PAWU

PAPU

PASR

CMOS General purpose I/O. Register enabled pull-high and

wake-up.

INT

PASR

IFS0

—

External interrupt input

STCK

IFS0

—

STM clock input

AN3

PASR

—

ADC input channel 3

PA4/[INT]/PTCK/STP

PA4

PAWU

PAPU

PASR

CMOS General purpose I/O. Register enabled pull-high and

wake-up.

INT

PASR

IFS0

—

External interrupt input

PTCK

PASR

IFS0

—

PTM clock input

STP

PASR

—

CMOS STM output

PA5/[INT]/PTPI

PA5

PAWU

PAPU

CMOS General purpose I/O. Register enabled pull-high and

wake-up.

INT

IFS0

—

External interrupt input

PTPI

IFS0

—

PTM input

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