EM84530

2-IN-ONE MOUSE CONTROLLER

1

* This specification are subject to be changed without notice.

6.28.1999

Preliminary

Preliminary

Preliminary

Preliminary

Preliminary

GENERAL DESCRIPTION

The EM84530 Mouse Controller is specially designed to control serial mouse or PS/2 mouse device.

This single chip can interface three key-switches and 4 X-Y photo-couples directly to RS-232C or 8042

controller.

FEATURES

• Include PnP software scrolling function

• Using 50k

Ω ±1% resistor for RC oscillation.

• Compatible with legacy PS/2 mouse.

• Compatible with Microsoft serial mouse.

• Compatible with Microsoft PS/2 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 sampiling rate of motion detector is up to 65KHz.

• Built-in three zener diodes : one in VDD to VSS, two in RTS to VDD.

• 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-couples inputs.

• RTS debouncing circuit included.

• Photo couple test mode included.

• Low power dissipation.

APPLICATION

• Serial PnP mouse.

• PS/2 mouse.

• Combo mouse.

PIN ASSIGNMENT

OSC.OUT

NC

NC

CLK/RTS

DATA/RXD

OPT

VSS

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

OSCR

Y2

Y1

X2

X1

L

M

R

EM84530