Pad Description

Pad No.

Pad Name

I/O Mask Option

Function

17, 18

BZ,BZ

O

Note 1

Sound effect outputs

8

9

TEST1

TEST2

I

I

—

For test mode only

TEST1 and TEST2 are left open when the

HTG1390 is in normal operation (with an internal

pull high resistor).

5~7

COM2~COM0

O

Note 2

Output for LCD panel common plate

10~13

PS3~PS0

I

Pull-high or

None. Note 3

4-bit port for input only

16

VSS

I

—

Negative power supply, GND

15

14

OSCI

OSCO

I

O

—

OSCI,OSCO are connected to an external resistor

for an internal system clock

19~21

PA2~PA0

O

CMOS or

NMOS Open

Drain

3-bit latch port for output only

22~24

PP0~PP2

I

Pull-high or

None. Note 2

3-bit port for input only

25

RES

I

—

Input to reset an internal LSI

Reset is active on logical low level

26~52

SEG0~SEG26

O

—

LCD driver outputs for LCD panel segment

1

VDD

I

—

Positive power supply

4

V3

I

—

LCD system power 1/2 bias generated

2, 3

C1, C2

I

—

LCD system voltage booster condensor connecting

terminal

Notes: The system clock provides 6 different sources selectable by mask option to drive the sound

effect clock. If the Holtek sound library is used only 128K and 64K are acceptable.

Each bit of ports PS and PP can be a trigger source of the HALT interrupt, selectable by mask

option.

Absolute Maximum Ratings*

Supply Voltage ................................. –0.3V~5.5V

Storage Temperature .................... –50°C~125°C

Operating Temperature...................... 0°C~70°C

*Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maxi-

mum Ratings” 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.

HTG1390

Preliminary

5

17th Nov ’98