EM83050H Datasheet | ELAN Microelectronics Corp

DESCRIPTION The EM83050H microcontroller is dedicated to a keyboard encoder ,specially designed for IBM PC XT/AT and all patible machines. The EM83050H controll all scan codes, three LEDs status, scan timing and munications between the keyboard and PC. It is easy to implement a high performance, low cost keyboard with the minimal external ponents. FEATURES - - - - - - - - - - - - Low cost - eliminate need external ponents. Phantom key detects. RC oscillator ( 1.8432MHz ). Support scan code set 1 ,2 and 3. Support PC XT/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 keys. 101/104/107 keys or other special application keyboard encoder. WINDOWS is registered trademarks of Microsoft corperation. APPLICATION - - - - - IBM PC XT/AT or patible machine keyboard. IBM PS/2 model 30,50,60,80 or patible machine keyboard. Japanese keyboard. Korean keyboard. Brazil keyboard. PIN ASSIGNMENTS P90 CLK DATA OSCO GND 5 4 3 2 1 NC OSCI VDD CAPS 40 39 38 37 P91 P92 P93 P94 P95 P50 P51 P52 P53 P54 6 7 8 9 10 11 12 13 14 15 36 35 34 33 32 31 30 29 28 27 NUM SCROLL P67 P66 P65 P64 P63 P62 P61 P60 - This specification are subject to be changed without notice. P55 P56 P57 P80 P81 P82 P83 P84 P85 P86 P87 16 17 18 19 20 21 22 23 24 25 26 KEYBOARD ENCODER ary n i m i l e Pr PIN DESCRIPTIONS Symbol P50 P51 P52 P53 P54 P55 P56 P57 P80 P81 P82 P83 P84 P85 P86 P87 P90 P91 VSS SCROLL NUM CAPS P60 P61 P62 P63 P64 P65 P66 P67 CLK DATA VDD OSCO OSCR XT I/O O O O O O O O O O O O O O O O O O O I O O O I I I I I I I I I/O I/O I O I I Function Column 3 Low output scan line, 3-state Column 4 Low output scan line, 3-state Column 5 Low output scan line, 3-state Column 6 Low output scan line, 3-state Column 7 Low output scan line, 3-state Column 14 Low output scan line, 3-state Column 13 Low output scan line, 3-state Column 12 Low output scan...