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PDF MX83073P Data sheet ( Hoja de datos )
| Número de pieza | MX83073P | |
| Descripción | U+P Keyboard Encoder | |
| Fabricantes | LIZE | |
| Logotipo |  |
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Shenzhen LIZE Electronic Technology Co., Ltd
SPECIFICATION
MX83073P
U+P Keyboard Encoder
Version 1.0
reserves the right to change this documentation without prior notice
1 page  
Tel:86-755-8835 3502/03/04 Fax:86-755-8835 3509
Website:http://www.lizhiic.com
5. FUNCTION DESCRIPTION
MX83073P
U+P Keyboard Encoder
This section is divided into subsections for user convenience and clearer distinction.
Detailed PS/2 keyboard function descriptions are provided in Section 5.1. The USB keyboard
function descriptions are discussed in details in Section 5.2.
5.1 PS/2 KEYBOARD FUNCTION DESCRIPTION
The keyboard buffer, power-on reset and self test, input, output, commands, and scan codes
are described in the following sections.
5.1.1 KEYBOARD BUFFER
The keyboard will buffer 16 bytes in a first-in-first-out order when the system receives
scan codes from the keyboard. The response codes and repeated codes will not be buffered.
If the keystrokes generate a multiple-byte sequence, the entire sequence must fit into the
buffer or the keystroke is discarded and a buffer-overrun condition occurs.
5.1.2 POWER-ON RESET AND SELF TEST
The duration of the keyboard Power-on-Reset (POR) should be within 150 milliseconds and
2 seconds after the power is applied to the keyboard.
After executing POR, the keyboard executes a self test. The LEDs are turned on at the
beginning and off at the end of the self test. The self test takes a minimum of 300
milliseconds and a maximum of 500 milliseconds. If the self test is successful, a completion
code AA hex is sent to the system and the keyboard starts scanning. If the self test fails,
and error code is sent, the keyboard is disabled and waits for a command from the system.
The completion codes are sent between 450 ms to 2.5 s after POR, and between 300 ms to 500
ms after a reset command is acknowledged.
5.1.3 LOW VOLTAGE RESET (LVR)
MX83073P has a low voltage reset function, which is used to monitor the voltage of power
supply or external source. The low voltage reset voltage is 3.0V－3.2V.Vhys > 0.1V. Low
voltage reset will not happen if the period Vdd stays in low voltage is less than T ( 0.6ms).
Vdd
VLVR
Vhys
Resetb
T > 0.6mS
Shenzhen LIZE Electronic Technology Co., Ltd
Version: 1.0
Date: 30.Oct. 2009
Page: 5 of 33
5 Page 
keyboard only)
ENTER
SHIFT_L
K45 (102 key
keyboard only)
Z
Tel:86-755-8835 3502/03/04 Fax:86-755-8835 3509
Website:http://www.lizhiic.com
MX83073P
U+P Keyboard Encoder
1C 9C F10 44 C4
2A AA F11 57 D7
56 D6 F12 58 D8
2C AC SCROLL 46 C6
Base Case, or Shift + Nun
Key
Lock
Make/Break
INS E0 52/E0 D2
DEL E0 53/E0 D3
LEFT
E0 4B/E0 CB
HOME
E0 47/E0 C7
END
E0 4F/E0 CF
UP E0 48/E0 C8
DOWN
E0 50/E0 D0
PAGE UP
PAGE
DOWN
RIGHT
E0 49/E0 C9
E0 51/E0 D1
E0 4D/ED CD
Shift Case * Make/Break
E0 AA E0 52
/E0 D2 E0 2A
E0 AA E0 53
/E0 D3 E0 2A
E0 AA E0 4B
/E0 CB E0 2A
E0 AA E0 47
/E0 C7 E0 2A
E0 AA E0 4F
/E0 CF E0 2A
E0 AA E0 48
/E0 C8 E0 2A
E0 AA E0 50
/E0 D0 E0 2A
E0 AA E0 49
/E0 C9 E0 2A
E0 AA E0 51
/E0 D1 E0 2A
E0 AA E0 4D
/E0 CD E0 2A
Nun Lock
Make/Break
E0 2A E0 52
/E0 D2 E0 AA
E0 2A E0 53
/E0 D3 E0 AA
E0 2A E0 4B
/E0 CB E0 AA
E0 2A E0 47
/E0 C7 E0 AA
E0 2A E0 4F
/E0 CF E0 AA
E0 2A E0 48
/E0 C8 E0 AA
E0 2A E0 50
/E0 D0 E0 AA
E0 2A E0 49
/E0 C9 E0 AA
E0 2A E0 51
/E0 D1 E0 AA
E0 2A E0 4D
/E0 CD E0 AA
Key Scan Code Make/Break
(/) E0 35 / E0 B5
Shift Case Make/Break *
E0 AA E0 35 / E0 B5 E0 2A
Key
PRINT
Scan Code
Make/Break
E0 2A E0 37
/E0 B7 E0 AA
Ctrl Case, Shift Case
Make/Break
E0 37 / E0 B7
Alt Case
Make/Break
54 / D4
Shenzhen LIZE Electronic Technology Co., Ltd
Version: 1.0
Date: 30.Oct. 2009
Page: 11 of 33
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MX83073P.PDF ] | |
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