HT46C24 datasheet(4/49 Pages) HOLTEK

4 / 49 page

Pin Name

I/O

Options

Description

PC0~PC4

(28-pin package only)

I/O

Pull-high

Bidirectional 8-bit input/output port. Software instructions determine the

CMOS output, Schmitt trigger input with or without pull-high resistor (deter-

mine by pull-high option: byte option).

PC0~PC7

(48-pin package only)

PD0/PWM0

PD1/PWM1/TMR1

(28-pin package only)

I/O

Pull-high

PWM

Bidirectional 8-bit input/output port. Software instructions determine the

CMOS output, Schmitt trigger input with or without a pull-high resistor.

The PWM0 output function is pin-shared with PD0.

The PWM1 output function is pin-shared with PD1 and TMR1.

(determined by pull-high option: byte option)

PD0/PWM0

PD1/PWM1

PD2/PWM2

PD3/PWM3

PD4~PD7

(48-pin package only)

I/O

Pull-high

PWM

Bidirectional 8-bit input/output port. Software instructions determine the

CMOS output, Schmitt trigger input with or without a pull-high resistor (de-

termined by pull-high option: byte option). The PWM0/PWM1/PWM2/

PWM3 output function are pin-shared with PD0/PD1/PD2/PD3 (depending

on the PWM options).

PF0~PF7

(48-pin package only)

I/O

Pull-high

Bidirectional 8-bit input/output port. Software instructions determine the

CMOS output, Schmitt trigger input with or without pull-high resistor (deter-

mine by pull-high option: byte option).

TMR0

Timer/Event Counter 0 Schmitt trigger input (without pull-high resistor)

TMR1

(48-pin package only)

Timer/Event Counter 1 Schmitt trigger input (without pull-high resistor).

RES

Schmitt trigger reset input, active low

VSS

¾¾

Negative power supply, ground

VDD

¾¾

Positive power supply

OSC1

OSC2

Crystal

or RC

OSC1 and OSC2 are connected to an RC network or a crystal (by options)

for the internal system clock. In the case of RC operation, OSC2 is the

output terminal for 1/4 system clock.

TEST1~3

Test mode input pin it disconnects in normal operation.

¾¾

No connection

Absolute Maximum Ratings

Supply Voltage ...........................VSS

-0.3V to VSS+6.0V

Storage Temperature ............................

-50°Cto125°C

Input Voltage..............................VSS

-0.3V to VDD+0.3V

Operating Temperature...........................

-40°Cto85°C

Note: These are stress ratings only. Stresses exceeding the range specified under

²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those

listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-

ity.

D.C. Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VDD

Conditions

VDD

Operating Voltage

fSYS=4MHz

2.2

5.5

fSYS=8MHz

3.3

5.5

IDD1

Operating Current (Crystal OSC)

No load, fSYS=4MHz

ADC disable

0.6

1.5

IDD2

Operating Current (RC OSC)

No load, fSYS=4MHz

ADC disable

0.8

1.5

2.5

HT46R24/HT46C24

Rev. 1.50

May 3, 2004

HT46C24 Datasheet(PDF) 4 Page - Holtek Semiconductor Inc

HT46C24 Datasheet(HTML) 4 Page - Holtek Semiconductor Inc

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