HT85F2270 datasheet(20/226 Pages) HOLTEK

20 / 226 page

Rev. 1.00

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Standard 8051 8-Bit Flash MCU

HT85F2260/HT85F2270/HT85F2280

6 Pin Descriptions

With the exception of the power pins, all pins on these devices can be referenced by their Port

name, e.g. P0.0, P0.1 etc, which refer to the digital I/O function of the pins. However these Port

pins are also shared with other function such as the Analog to Digital Converter, Serial Port pins

etc. The function of each pin is listed in the following table, however the details behind how each

pin is configured is contained in other sections of the datasheet.

Pin Name

Function

OPT

I/T

O/T

Description

P0.0/ICPDA/TDA

P0.0

P0�0

P0�1

P0WAKE

C�OS

General purpose I/O. Register selected I/O mode and wake-up

ICPDA

—

ICP Data Input/Output

TDA

—

Debug Data Input/Output

P0.1/C1OUT

P0.1

P0�0

P0�1

P0WAKE

C�OS General purpose I/O. Register selected I/O mode and wake-up

C1OUT

—

C�OS Comparator 1 Output

P0.�/SSN

P0.�

P0�0

P0�1

P0WAKE

C�OS General purpose I/O. Register selected I/O mode and wake-up

SSN

—

SPI Slave select Input

P0.�/SCK

P0.�

P0�0

P0�1

P0WAKE

C�OS General purpose I/O. Register selected I/O mode and wake-up

SCK

—

C�OS SPI Clock

P0.4/�ISO

P0.4

P0�0

P0�1

P0WAKE

C�OS General purpose I/O. Register selected I/O mode and wake-up

�ISO

—

C�OS SPI �aster In Slave Out pin

P0.�/�OSI

P0.�

P0�0

P0�1

P0WAKE

C�OS General purpose I/O. Register selected I/O mode and wake-up

�OSI

—

C�OS SPI �aster Out Slave In pin

P0.6/SCL

P0.6

P0�0

P0�1

P0WAKE

C�OS General purpose I/O. Register selected I/O mode and wake-up

SCL

—

N�OS I�C Clock

P0.7/SDA

P0.7

P0�0

P0�1

P0WAKE

C�OS General purpose I/O. Register selected I/O mode and wake-up

SDA

—

N�OS I�C Data

P1.0/INT�/CC0

P1.0

P1�0

P1�1

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

INT�

—

External Interrupt � Input

CC0

—

C�OS Compare/Capture input/output for PCA module 0

P1.1/INT4/CC1

P1.1

P1�0

P1�1

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

INT4

—

External Interrupt 4 Input

CC1

—

C�OS Compare/Capture input/output for PCA module 1

P1.�/INT�/CC�

P1.�

P1�0

P1�1

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

INT�

—

External Interrupt � Input

CC�

—

C�OS Compare/Capture input/output for PCA module �

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