Pin Description

Pin No.

Pin Name

I/O

Description

1, 2

Z1, Z2

I Z, axis input supports two kinds of scroller input, namely;

optomechanical and mechanical.

3

VDD

¾ Positive power supply

4B5

I Button 5, normal pull-low (50kW), Press connect to high.

5

VSS

¾ Negative power supply

6

OSCI

I 2MHz RC oscillator for system frequency with external pull-high

resistor and built-in Capacitor.

7

CLK

I/O CLK I/O, PS/2 mouse CLK line. NMOS open drain output with 5kW

pull-high resistor.

8

DATA

I/O DATA I/O, PS/2 mouse DATA line. NMOS open drain output with

5kW pull-high resistor.

9~11

RB, RO, LB

I

Right Button: Normal pull-low (50kW),

Pressing the button connects to high.

Rolling Button: Normal pull-low (50kW),

Pressing the button connects to high.

Left Button: Normal pull-low (50kW),

Pressing the button connects to high.

12

B4

I Button 4, normal pull-low (50kW), Press connect to high.

13~16

X1, X2, Y1, Y2

I X/Y axis photo input with built-in Holtek¢s special dynamic photo

input resistor

Absolute Maximum Ratings

Supply Voltage..............................-0.3V to 6.5V

Storage Temperature.................-50°Cto125°C

Operating Temperature ..............-25°Cto70°C

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-

mum 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 expo-

sure to extreme conditions may affect device reliability.

HT82M398A

2

February 22, 2000