Silan

Semiconductors

SC84520

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2000.12.31

1

TWO IN ONE SCROLLING MOUSE

CONTROLLER

DESCRIPTION

The SC84520 Scrolling Mouse Controller id specially designed to

control serial mouse or PS/2 mouse device. This single chip can

interface three key-switched and 4 X-Y photo-couples plus Z-axis

directly plus Z-axis directly to RS-232C or 8042 controller.

There are four types Z-axis inputs used to implement scrolling

mouse functionality.

FEATURES

*Using 50k

Ω± 1% resistor for RC oscillation

*Compatible with legacy PS/2 mouse

*Compatible with Microsoft serial scrolling mouse

*Compatible with Microsoft PS/2 scrolling mouse

*Serial or PS/2 port auto-detect

*100 bytes PnP ID code could be filled by code layer

*Built-in noise immunity circuit

*The sampling rate of motion detector is up to 65 kHz

*CMOS push-pull RXD output

*Built-in current comparator for photo-couples input

*Built-in three step dynamic input impedance

*Three key-switches and four photo-coupled inputs

*RTS debouncing circuit include

*Photo couple test mode include

*Low power dissipation

*Six types Z direction input:

1. Photo couples input (Z/1)

2. Key-switches input

3. Voltage-sensing input

4. Mechanical input(Z/1)

5. Photo couples input (Z/4)

6. Mechanical input (Z/2)

DIP-16

*Package type:

SC84510AP: 16DIP, Photo coupled

input(Z/1)

SC84510BP: 16DIP, Key-switches input

SC84510CP: 16DIP, Voltage-sensing

Input

SC84510DP: 16DIP, Mechanical input

(Z/1)

SC84510EP: 16DIP, Photo couples input

(Z/4)

SC84510FP: 16DIP, Mechanical input

(Z/2)

APPLICATIONS

*Serial PnP scrolling mouse

*PS/2 scrolling mouse

*Combo PnP scrolling mouse