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PDF LG83053FC Data sheet ( Hoja de datos )
| Número de pieza | LG83053FC | |
| Descripción | PS2 Carbon Keyboard Encoder | |
| Fabricantes | LIZE | |
| Logotipo |  |
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Shenzhen LIZE Electronic Technology Co., Ltd
SPECIFICATION
LG83053FC
PS2 Carbon Keyboard Encoder
Version 1.0
Reserves the right to change this documentation without prior notice.
1 page  
Tel:86-755-8835 3502/03/04
Website:http://www.lizhiic.com
Fax:86-755-8835 3509
LG83053FC
PS/2 Carbon Keyboard
Parameter
Output low voltage for
LEDS
Internal Pull-high
resistance (PORT B)
Internal Pull-high
resistance for DATA CLK
Output low voltage for
DATA CLK
Sym.
VOL2
R PH1
R PH2
VOL3
Min.
-
-
3.5
-
Typ.
-
1.5
4.2
-
Max.
3.2
-
5
0.4
Unit
V
MΩ
KΩ
V
Condition
IOL2=10mA
V PH1 =0
VPH2=0
IOL3=5mA
7. AC CHARACTERISTICS
Parameter
Sym.
Time from DATA transition to the falling edge of
T1
CLK
Time from rising edge of CLK to DATA transition T2
Duration of CLK inactive
T3
Duration of CLK active
T4
Time from the falling edge of clock 11 to
auxiliary device inhibit to ensure the auxiliary T5
device does not start another transmission
Time from inactive to active CLK transition, used
T6
when auxiliary device samples DATA
System clock
Fosc
Min.
5
5
30
30
-
5
-
Typ.
-
-
40
40
-
-
2.0
Max.
25
25
50
50
50
25
-
Unit
μs
μs
μs
μs
μs
μs
MHz
8. BLOCK DIAGRAM
VDD
OSCI
OSC
Clock
Gener
Keyboard
Scan &
I/O control
PA0~P
PB0~P
PC0~P
PD0~P
PE0~P
Timing
Gener
Command
Processor
& Encoder
Power
On
PS2
interface
CLK
DATA
Shenzhen LIZE Electronic Technology Co., Ltd
Version: 1.0
GND
Date: 05. Jan. 2012
Page: 5 of 26
5 Page 
Tel:86-755-8835 3502/03/04
Website:http://www.lizhiic.com
Fax:86-755-8835 3509
LG83053FC
PS/2 Carbon Keyboard
Echo – EE (hex)
- Sends an EE (hex) to the system.
- Returns to previous scanning state.
Set status indicators – ED (hex)
- Sends an ACK to the system.
- Receives option byte.
- Sends an ACK to the system.
- Updates status indicators.
- Returns to previous scanning state.
9.4.2 COMMAND TO THE SYSTEM
Acknowledge - FA (hex)
If the keyboard receives an valid command from the system, an ACK will be send back to the
system, except that the command received is RESEND or ECHO.
BAT Completion Code - AA (hex)
This command is sent to the system after successful completion of keyboard BAT.
Buffer overrun 00, FF (hex)
If keyboard buffer overflows, the last byte in the buffer will be replaced by 00 or FF
Scan code set 1 - FF,
Scan code sets 2 and 3 - 00
Resend - FE (hex)
This command is sent to the system after the keyboard receives an invalid code or any incorrect
parity.
Echo - EE (hex)
This command is sent to the system after the keyboard receives an ECHO command.
Keyboards ID - 83AB (hex)
The 2-byte ID is sent to the system after receives READ ID command. The low byte is sent first,
then high byte is sent.
Shenzhen LIZE Electronic Technology Co., Ltd
Version: 1.0
Date: 05. Jan. 2012
Page: 11 of 26
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet LG83053FC.PDF ] | |
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