HT48R31 Ver la hoja de datos (PDF) - Holtek Semiconductor

Número de pieza

componentes Descripción

Fabricante

HT48R31

8-Bit Microcontroller Series

Holtek Semiconductor 

HT48CXX/HT48RXX

Pin Description of HT48C30

Pin Name I/O

Mask

Option

Function

PA0~PA7

I/O

Wake-up

Pull-high

or None

Bidirectional 8-bit input/output ports

Each bit can be configured as a wake-up input by mask option.

Software instructions determine the CMOS output or schmitt

trigger input with or without a pull high resistor (by mask option).

PB0~PB7

Bidirectional 8-bit input/output ports

I/O

Pull-high Software instructions determine the CMOS output or schmitt

or None trigger input with or without a pull high resistor (by mask

option).

VSS

—

—

Negative power supply, GND

INT

I

—

External interrupt schmitt trigger input with a pull high

resistor. Edge triggered is activated on a high to low transition.

TMR

I

—

Schmitt trigger input for timer/event counter

PC0~PC5

Bidirectional 6-bit input/output ports

I/O

Pull-high Software instructions determine the CMOS output or schmitt

or None trigger input with or without a pull high resistor (by mask

option).

RES

I

—

Schmitt trigger reset input, active low

VDD

—

—

Positive power supply

OSC1

OSC2

I

O

Crystal or

RC

OSC1 and OSC2 are connected to an RC network or a crystal

(by mask option) for the internal system clock. In the case of RC

operation, OSC2 is the output terminal for 1/4 system clock.

7

25th May ’99

Share Link: