HT85F2270 datasheet(22/226 Pages) HOLTEK

22 / 226 page

Rev. 1.00

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Standard 8051 8-Bit Flash MCU

HT85F2260/HT85F2270/HT85F2280

Pin Name

Function

OPT

I/T

O/T

Description

P4.�/AIN.�

P4.�

P4�0

P4�1

C�OS General purpose I/O. Register selected I/O mode

AIN.�

—

ADC Input Channel �

P4.4/AIN.4

P4.4

P4�0

P4�1

C�OS General purpose I/O. Register selected I/O mode

AIN.4

—

ADC Input Channel 4

P4.�/AIN.�

P4.�

P4�0

P4�1

C�OS General purpose I/O. Register selected I/O mode

AIN.�

—

ADC Input Channel �

P4.6/AIN.6

P4.6

P4�0

P4�1

C�OS General purpose I/O. Register selected I/O mode

AIN.6

—

ADC Input Channel 6

P4.7/AIN.7

P4.7

P4�0

P4�1

C�OS General purpose I/O. Register selected I/O mode

AIN.7

—

ADC Input Channel 7

P�.0~P�.�

P��0

P��1

C�OS General purpose I/O. Register selected I/O mode

P�.4/C0OUT

P�.4

P��0

P��1

C�OS General purpose I/O. Register selected I/O mode

C0OUT

—

C�OS Comparator 0 Output

P�.�/XT1

P�.�

P��0

P��1

C�OS General purpose I/O. Register selected I/O mode

XT1

—

LXT

—

Low Frequenc� Cr�stal Oscillator

P�.6/XT�

P�.6

P��0

P��1

C�OS General purpose I/O. Register selected I/O mode

XT�

—

LXT

Low Frequenc� Cr�stal Oscillator

P�.7/DAC

P�.7

P��0

P��1

C�OS General purpose I/O. Register selected I/O mode

DAC

—

C�OS DAC Output

CP0-/CP0+

CP0-

—

Comparator 0 Inverting Input

CP0+

—

Comparator 0 Non-Inverting Input

CP1-/CP1+

CP1-

—

Comparator 1 Inverting Input

CP1+

—

Comparator 1 Non-Inverting Input

OSC1

—

HXT

—

High Frequenc� Cr�stal Oscillator

OSC�

—

HXT

High Frequenc� Cr�stal Oscillator

RESET/ICPCK/TCK

RESET

—

RESET pin

ICPCK

—

ICP Clock Input

TCK

—

Debug Clock Input

VREF

—

Reference Voltage for ADC/DAC

VDD

—

PWR

—

Positive Power suppl� for CORE

VCCA1

—

PWR

—

Positive Power suppl� for I/O pad

VCCA�

—

PWR

—

Positive Power suppl� for DAC

VCCA�

—

PWR

—

Positive Power suppl� for ADC

VSS

—

PWR

—

Negative Power suppl�

Note: I/T: Input t�pe;

O/T: Output t�pe;

ST: Schmitt Trigger input

OPT: Optional by configuration option (CO) or register option

PWR: Power;

N�OS: N�OS output

C�OS: C�OS output;

AN: Analog input pin

LXT: low frequenc� cr�stal oscillator;

HXT: high frequenc� cr�stal oscillator

Where devices exist in more than one package type the table reflects the situation for the package with the

largest number of pins. For this reason not all pins described in the table may exist on all package types.

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