EM84530
2-IN-ONE MOUSE CONTROLLER
ry
limina
Pre
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 50kΩ
±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
EM84530
V
DD
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
* This specification are subject to be changed without notice.
6.28.1999
1
EMC [ ELAN MICROELECTRONICS CORP ]
