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參數(shù)資料
| 型號(hào)： | HT82K628 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Windows 2000 Keyboard Encoder |
| 中文描述： | Windows 2000的鍵盤(pán)編碼器 |
| 文件頁(yè)數(shù)： | 3/18頁(yè) |
| 文件大小： | 145K |
| 代理商： | HT82K628 |
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HT82K628A
Rev. 1.60
3
April 16, 2004
Functional Description
Command from the Host
The following table shows the commands that the host
may send and their hexadecimal values.
Command
Hex Value
Set/Reset Status Indicators
ED
Echo
EE
Invalid Command
EF
Select Alternate Scan Codes
F0
Invalid Command
F1
Read ID
F2
Set Typematic Rate/Delay
F3
Enable
F4
Default Disable
F5
Set Default
F6
Set All Keys - Typematic
F7
Set All Keys - Make/Break
F8
Set All Keys - Make
F9
Set All Keys - Typematic/Make/Break
FA
Set Key Type - Typematic
FB
Set Key Type - Make/Break
FC
Set Key Type - Make
FD
Resend
FE
Reset
FF
The commands may be sent to the HT82K628A at any
time and the HT82K628A will respond within 25ms ex-
cept when performing the internal diagnostics or execut-
ing a Reset command.
EDH
Set/Reset Status Indicators
Three status indicators on the keyboard-Num Lock,
Caps Lock, and Scroll Lock-are accessible by the host.
The HT82K628A activates or deactivates these indica-
tors when it receives a valid command-code sequence
from the system. The command sequence begins with
the command byte (hex ED). The HT82K628Aresponds
to the command byte with ACK, discontinues scanning,
assignments for this option byte are as follow:
Bit
Indicator
0
Scroll Lock Indicator
1
Num Lock Indicator
2
Caps Lock Indicator
3~7
Reserved (Must be 0)
If a bit for an indicator is set to 1, the indicator is turned
on. If a bit is set to 0, the indicator is turned off.
The HT82K628A responds to the option byte with ACK,
setstheindicatorsandiftheHT82K628Awaspreviously
enabled, continues scanning. The status of the indica-
tors will reflect the bits in the option byte and can be acti-
vated or deactivated in any combination. If another
command is received in place of the option byte, execu-
tion of the Set/Reset Mode Indicators command is
stopped, with no change to the indicator status, and the
new command is processed.
Immediately after power-on, the lights default to the off
state. If the Set Default and Default Disable commands
are received, the lamps remain in the state they were in
before the command was received.
EEH
Echo
Echo is a diagnostic aid. When the HT82K628A re-
ceives this command, it issues a hex EE response and if
the HT82K628A was previously enabled, continues
scanning.
EFH and F1H
Invalid Command
EFh and F1h are invalid commands and are not sup-
ported. If HT82K628A receives one of these and sends
it, the HT82K628A will not acknowledge the command,
but returns a Resend command and continues in its pre-
vious scanning state.
F0H
Select Alternate Scan Codes
ThiscommandinstructstheHT82K628Atoselectoneof
the three sets of scan codes. The HT82K628Aacknowl-
edges receipt of this command with ACK, clears both
the output buffer and the typematic key. The host then
sends the option byte and the keyboard responds with
another ACK. An option byte value of hex 01 selects
scan code set 1, hex 02 selects set 2 and hex 03 selects
code set3.
An option byte value of hex 00 causes the HT82K628A
to acknowledge with ACK and sends a byte telling the
host which scan code set is currently in use.
After establishing the new scan code set, the
HT82K628A returns to the scanning state it was in be-
fore receiving the Select Alternate Scan Codes com-
mand.
F2H
Read ID
This command requests identification information from
the HT82K628A. The HT82K628A responds with ACK,
discontinues scanning and sends the two keyboard ID
byteshex83handAbh.AftertheoutputofthesecondID
byte, the HT82K628A resumes scanning.
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| HT82K629A | Windows 2000 USB+PS/2 Keyboard Encoder |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT82K628A | 制造商:HOLTEK 制造商全稱(chēng):Holtek Semiconductor Inc 功能描述:Windows 2000 Keyboard Encoder |
| HT82K628A(40DIP) | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Controller Miscellaneous - Datasheet Reference |
| HT82K628A-40DIPLF | 制造商:Holtek Semiconductor Inc 功能描述:IC WIN 2000 KB PS2 CONT DIP40 制造商:Holtek Semiconductor Inc 功能描述:IC, WIN 2000 KB PS2 CONT, DIP40 制造商:Holtek Semiconductor Inc 功能描述:IC, WIN 2000 KB PS2 CONT, DIP40, IC Function:Keyboard Encoder, Brief Features:Su 制造商:Holtek Semiconductor Inc 功能描述:IC, PS/2 KEYBOARD ENCODER, DIP-40, IC Function:Keyboard Encoder, Brief Features:Supports Japanese, Korean, Brazilian and European, RC Oscillator, Phantom Key Detection, Supply Voltage Min:3V, Supply Voltage Max:5.25V, No. of Pins:40 , RoHS Compliant: Yes |
| HT82K629A | 制造商:HOLTEK 制造商全稱(chēng):Holtek Semiconductor Inc 功能描述:Windows 2000 USB+PS/2 Keyboard Encoder |
| HT82K629A-40DIPLF | 制造商:Holtek Semiconductor Inc 功能描述:IC USB/PS2 CONT WIN 2000 KEYBOARD 制造商:HOLTEK 功能描述:IC, USB/PS2 CONT, WIN 2000 KEYBOARD 制造商:Holtek Semiconductor Inc 功能描述:USB/PS2 INTERFACE, WINDOWS 2000, DIP-40; USB Type:Keyboard Encoder; USB Version:1.1; Supply Voltage Min:4.4V; Supply Voltage Max:5.5V; Digital IC Case Style:DIP; No. of Pins:40; Operating Temperature Min:0C ;RoHS Compliant: Yes |
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