EM84530 Datasheet, PDF (1/14 Pages) ELAN Microelectronics Corp – 2-IN-ONE MOUSE CONTROLLER

Preliminary
EM84530
2-IN-ONE MOUSE CONTROLLER
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
VDD 1
OSC.OUT 2
NC 3
NC 4
CLK/RTS 5
DATA/RXD 6
OPT 7
VSS 8
16 OSCR
15 Y2
14 Y1
13 X2
12 X1
11 L
10 M
9R
* This specification are subject to be changed without notice.
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