EM84530

EM84530 2-IN-ONE MOUSE CONTROLLER ary n i m i l e Pr 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 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 EM84530 2-IN-ONE MOUSE CONTROLLER FUNCTIONAL BLOCK DIAGRAM inary m i l e r P DATA/RXD CLK/RTS OPT X1 X2 Y1 Y2 C O M P A R A T O R D ME OT TE IC OT NO R D E B O U N C E COUNTER MULTIPLEXER DA...