EM83049 Datasheet, PDF (1/17 Pages) ELAN Microelectronics Corp – KEYBOARD ENCODER

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GENERAL DESCRIPTION
The EM83049 microcontroller is dedicated to a keyboard encoder ,specially designed for IBM PC AT,XT and
all compatible machines. The EM83049 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,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 WINDOWS^TM keys.
• 101/102/104 keys or other special application keyboard encoder.
• WINDOWS is registered trademarks of Microsoft corperation.
APPLICATION
• IBM PC/AT,XT or compatible machine keyboard.
• IBM PS/2 model 30,50,60,80 or compatible machine keyboard.
• Japanese keyboard.
• Korean keyboard.
PIN ASSIGNMENTS
EM83049
VSS 1
NC 2
DATA 3
CLK 4
P90 5
P91 6
NC 7
NC 8
XT 9
NC 10
P50 11
P51 12
P52 13
P53 14
P54 15
P55 16
P56 17
P57 18
P80 19
P81 20
40 OSCO
39 OSCR
38 VDD
37 CAPS
36 NUM
35 SCROLL
34 P67
33 P66
32 P65
31 P64
30 P63
29 P62
28 P61
27 P60
26 P87
25 P86
24 P85
23 P84
22 P83
21 P82
* This specification are subject to be changed without notice.
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