UT84520

UTC UT84520 PS/2 SCROLLING MOUSE CONTROLLER DESCRIPTION The UT84520 Scrolling Mouse Controller is specially designed to control PS/2 mouse device．This single chip can interface with three key-switches and 4X-Y photo-couples plus Z-axis directly to 8042 controller． There are four types of Z-axis inputs used to implement scrolling mouse functionality． CMOS IC FEATURES *Using 50KΩ+5% resistor for RC oscillation． *Compatible with legacy PS/2 mouse． *Compatible with Microsoft PS/2 scrolling mouse． *Built-in noise immunity circuit． *The sampling rate of motion detector is up to 65KHz． *Built-in three step dynamic input impedance． DIP-16 *Three key-switches and four photo-couples inputs． *Photo couple test mode included﹒ *Low power dissipation． *Two types Z direction input: 1.Photo couples input 2.Mechanical input UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R502-004,A UTC UT84520 Pin Assignment VDD O SC.O UT Z1 Z2 CLK DATA O PT 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 CMOS IC Pin Descriptions Pin No 1 2 3 4 5 6 Symbol Vdd OSC.OUT Z1 Z2 CLK DATA I/O P O I I I/O I/O Function Power line The RC oscillation clock output. Or 3mA sink current output for X, Y photo emitters Z-axis input. Photo mode: three steps dynamic input impedance. Connect to 8042 auxiliary port CLK line in PS/2 mode. Connect to 8042 auxiliary port DATA line in PS/2 mode. Input: 200Kohm pull low to Vss. 7 OPT I When Opt is connected to Vdd, UT84520 will enter test mode. In test mode, L w...