Pad Description

Pad Name

I/O

Internal

Connection

Function

PA0~PA7

I/O

Pull-High

or None

Bidirectional 8-bit Input/Output port, wake-up by mask option

VSSA

¾¾

Negative power supply of DAC, ground

VSS

¾¾

Negative power supply, ground

VDD

¾¾

Positive power supply

VDDA

¾¾

DAC power supply

TEST

¾¾

No connection (open)

AUD

O

¾

Audio output for driving a external transistor or for driving HT82V733

RES

I

¾

Reset input, active low

OSC1

OSC2

I

O

¾

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 ter-

minal for 1/8 system clock. The system clock may come from the crystal, the two

pins cannot be floating.

Absolute Maximum Ratings

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

-50°Cto125°C

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

-25°Cto70°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

Conditions

Operating Voltage

¾¾

2.4

3

5

V

Operating Current

5V

No load

¾

816

mA

Standby Current (WDT Disabled)

5V

No load

System HALT

¾

1

¾mA

I/O Ports Sink Current

5V

9.7

16.2

¾

mA

I/O Ports Source Current

5V

-5.2

-8.7

¾

mA

Pull-High Resistance of I/O Ports

5V

11

22

44

k

W

Input High Voltage for I/O Ports

5V

¾

3.5

¾

5V

Input Low Voltage for I/O Ports

5V

¾

0

¾

1.5

V

Input High Voltage (RES)5V

¾¾

4

¾

V

Input Low Voltage (RES)5V

¾¾

2.5

¾

V

HT36A4

Rev. 1.00

3

July 2, 2003