EM83053AH

EM83053A/BH KEYBOARD ENCODER GENERAL DESCRIPTION The EM83053A/BH microcontroller is dedicated to a keyboard encoder ,specially designed for IBM PC AT and all compatible machines. The EM83053A/BH controll all scan codes, three LEDs status, scan timing and communications between the keyboard and PC. It is easy to implement a high performance, low cost keyboard with the minimal external components. FEATURES Low cost - eliminate need external components. Phantom key detects. RC oscillator ( 1.8432MHz ). Support scan code set 1 ,2 and 3. Support PC AT and PS/2 keyboard . Low power CMOS device technology. Internal pull-up resistor. Tri-state outputs for easy board application. Built-in 4K ROM. Support WINDOWSTM 95, 98, 2000 keys. 104/107 keys with multi-media or other special application keyboard encoder. WINDOWS is registered trademarks of Microsoft corperation. APPLICATION IBM PC AT or compatible machine keyboard. IBM PS/2 model 30,50,60,80 or compatible machine keyboard. Japanese keyboard. Korean keyboard. Brazilian keyboard. European keyboard. PIN ASSIGNMENTS R_OSCI VDD VDD CAPS P90 CLK DATA OSCO GND P90 CLK DATA OSCO GND R_OSCI VDD CAPS 39 38 37 5 4 3 2 1 40 39 38 37 5 4 3 2 1 P91 P92 P93 XT P95 P50 P51 P52 P53 P54 6 7 8 9 10 11 12 13 14 15 EM83053AH 36 35 34 33 32 31 30 29 28 27 NUM SCROLL P67 P66 P65 P64 P63 P62 P61 P60 P91 P92 P93 P94 P95 P50 P51 P52 P53 P54 6 7 8 9 10 11 12 13 14 15 EM83053BH 36 35 34 33 32 31 30 29 28 27...