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EM83053AH Schematic ( PDF Datasheet ) - ELAN Microelectronics Corp

Teilenummer EM83053AH
Beschreibung KEYBOARD ENCODER
Hersteller ELAN Microelectronics Corp
Logo ELAN Microelectronics Corp Logo 




Gesamt 24 Seiten
EM83053AH Datasheet, Funktion
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
P91 6
P92 7
P93 8
XT 9
P95 10
P50 11
P51 12
P52 13
P53 14
P54 15
EM83053AH
36 NUM
35 SCROLL
34 P67
33 P66
32 P65
31 P64
30 P63
29 P62
28 P61
27 P60
P91 6
P92 7
P93 8
P94 9
P95 10
P50 11
P51 12
P52 13
P53 14
P54 15
EM83053BH
36 NUM
35 SCROLL
34 P67
33 P66
32 P65
31 P64
30 P63
29 P62
28 P61
27 P60
* This specification are subject to be changed without notice.
6.9.2000 1






EM83053AH Datasheet, Funktion
EM83053A/BH
KEYBOARD ENCODER
- Responds ACK.
- Clears output buffer.
- Sets all key type (affect only scan code set 3 operation).
F7 : Typematic
F8 : Make/Break
F9 : Make
FA : Typematic/Make/Break
- Returns to previous scanning rate.
Set Key Type ( Hex FB,FC,FD )
- Responds ACK.
- Clears output buffer.
- Receives key ID byte
- Responds ACK.
- Sets key ID type (affect only scan code set 3 operation).
FB : Typematic
FC : Make/Break
FD : Make
- Returns to previous scanning rate.
Resend ( Hex FE )
- Sends the previous output again. If the previous byte is RESEND, the last byte before RESEND shall be sent.
Reset ( Hex FF )
- Responds ACK.
- Checks clock and data lines - Reset in the high state for at least 500 microseconds or receives another command.
- Default to scan code set 2.
Command to the system
The following are the keyboard output commands.
Acknowledge ( Hex FA )
The keyboard sends an acknowledge in response to any valid command from the system except for RESEND
and ECHO.
BAT Completion Code ( Hex AA )
This command is issued after successful completion of keyboard self test.
Echo ( Hex EE )
The keyboard sends this code in response to an ECHO command.
* This specification are subject to be changed without notice.
6.9.2000 6

6 Page









EM83053AH pdf, datenblatt
Key
J
K
L
;(:)
'(")
K42 @10
ENTER
SHIFT_L
K45 @10
Z
X
C
V
B
N
M
,(<)
.(>)
/(?)
SHIFT_R
CTRL_L
ALT_L
SPACE
ALT_R
CTRL_R
INS
DEL
LEFT
HOME
END
UP
DOWN
PAGE UP
PAGE DOWN
RIGHT
NUM
(7)
(4)
(1)
(/)
(8)
(5)
(2)
(0)
(*)
(9)
(6)
(3)
Make Code
3B
42
4B
4C
52
53
5A
12
13
1A
22
21
2A
32
31
3A
41
49
4A
59
11
19
29
39
58
67
64
61
6E
65
63
60
6F
6D
6A
76
6C
6B
69
77
75
73
72
70
7E
7D
74
7A
* This specification are subject to be changed without notice.
Break Code
F0 3B
F0 42
F0 4B
F0 4C
F0 52
F0 53
F0 5A
F0 12
F0 13
F0 1A
F0 22
F0 21
F0 2A
F0 32
F0 31
F0 3A
F0 41
F0 49
F0 4A
F0 59
F0 11
F0 19
F0 29
F0 39
F0 58
F0 67
F0 64
F0 61
F0 6E
F0 65
F0 63
F0 60
F0 6F
F0 6D
F0 6A
F0 76
F0 6C
F0 6B
F0 69
F0 77
F0 75
F0 73
F0 72
F0 70
F0 7E
F0 7D
F0 74
F0 7A
EM83053A/BH
KEYBOARD ENCODER
Default Key State
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Make/Break
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Make/Break
Make/Break
Make/Break
Typematic
Make only
Make only
Make only
Typematic
Typematic
Make only
Make only
Typematic
Typematic
Make only
Make only
Typematic
Make only
Make only
Make only
Make only
Make only
Make only
Make only
Make only
Make only
Make only
Make only
Make only
Make only
6.9.2000
12

12 Page





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