Pin Description

Pin Name

I/O

Configuration

Option

Description

PA0~PA7

I/O

¾

Bidirectional 8-bit input/output port with pull-high resistors. Software instructions

determine if the pin is an NMOS output or Schmitt Trigger input.

PB0, PB1

I/O

Wake-up

Bidirectional 2-bit input/output lines with pull-high resistors. Each individual bit

can be configured as a wake-up input by a configuration option. Software in-

structions determine if the pin is an NMOS output or Schmitt Trigger input.

PB2~PB6

I

Wake-up

5-bit Schmitt Trigger input lines with pull-high resistors. Each individual bit can

be configured as a wake-up input by a configuration option.

PB7

I

Wake-up

1-bit Schmitt trigger input lines without pull-high resistor. This bit can be config-

ured as a wake-up input by a configuration option.

REM

O

¾

Carrier output pin.

OSC1

I

¾

OSC1 is connected to an external resistor for the internal system clock.

VDD

¾¾

Positive power supply

VSS

¾

¾

Negative power supply, ground

Absolute Maximum Ratings

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

-50°Cto125°C

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

-40°Cto85°C

-100mA

Total Power Dissipation .....................................500mW

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 reliability.

D.C. Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Conditions

Operating Voltage

¾¾

2.0

¾

3.6

V

Operating Current

3V

¾

0.7

1.5

mA

Standby Current

3V

No load, system HALT

¾¾

1

mA

Input Low Voltage for I/O Ports

3V

¾

0

¾

V

Input High Voltage for I/O Ports

3V

¾

¾

V

Low Voltage Reset Voltage

¾¾

1.8

1.9

2.0

V

I/O Ports Sink Current

3V

48

¾

mA

REM Output Source Current

3V

-5

-7

¾

mA

Pull-high Resistance

3V

¾

100

150

200

k

W

Power-on Reset

¾¾

¾

¾

100

mV

Power-on Reset

¾¾

0.035

¾¾

V/ms

HT48RA0-3/HT48CA0-3

Rev.1.10

3

October 12, 2007