EM84520 Datasheet, PDF (1/19 Pages) ELAN Microelectronics Corp – 2-IN-ONE SCROLLING MOUSE CONTROLLER

EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
Preliminary
GENERAL DESCRIPTION
The EM84520 Scrolling 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 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 50kΩ ±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 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.
• Six types Z direction input:
1. Photo couples input. (Z/1)
4. Mechanical input. (Z/1)
2. Key-switches input.
5. Photo couples input. (Z/4)
3. Voltage-sensing input.
6. Mechanical input. (Z/2)
• Package type:
EM84520AP : 16DIP, Photo couples input. (Z/1) EM84520DP: 16DIP, Mechanical input. (Z/1)
EM84520BP : 16DIP, Key-switches input.
EM84520EP : 16DIP, Photo couples input. (Z/4)
EM84520CP : 16DIP, Voltage-sensing input. EM84520FP : 16DIP, Mechanical input. (Z/2)
APPLICATION
• Serial PnP scrolling mouse.
• PS/2 scrolling mouse.
• Combo PnP scrolling mouse.
PIN ASSIGNMENT
EM84520A/B/C/D/E/F
VDD 1
OSC.OUT 2
Z1 3
Z2 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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