EM83049 Datasheet | ELAN Microelectronics Corp

DESCRIPTION The EM83049 microcontroller is dedicated to a keyboard encoder ,specially designed for IBM PC AT,XT and all patible machines. The EM83049 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 AT,XT and PS/2 keyboard . Low power CMOS device technology. Internal pull-up resistor. Tri-state outputs for easy board application. 40 Pin DIP package. Built-in 4K ROM. Support WINDOWSTM keys. 101/102/104 keys or other special application keyboard encoder. WINDOWS is registered trademarks of Microsoft corperation. APPLICATION - - - - IBM PC/AT,XT or patible machine keyboard. IBM PS/2 model 30,50,60,80 or patible machine keyboard. Japanese keyboard. Korean keyboard. PIN ASSIGNMENTS VSS NC DATA CLK P90 P91 NC NC XT NC P50 P51 P52 P53 P54 P55 P56 P57 P80 P81 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 OSCO OSCR VDD CAPS NUM SCROLL P67 P66 P65 P64 P63 P62 P61 P60 P87 P86 P85 P84 P83 P82 - This specification are subject to be changed without notice. KEYBOARD ENCODER 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 0 Low output scan line, 3-state Column 1 Low output scan line, 3-state Column 2 Low output scan line, 3-state 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 8 Low output scan...