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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的鍵盤編碼器 |
| 文件頁(yè)數(shù)： | 4/18頁(yè) |
| 文件大小： | 145K |
| 代理商： | HT82K628 |
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HT82K628A
Rev. 1.60
4
April 16, 2004
F3H
Set Typematic Rate/Delay
The host issues the Set Typematic Rate/Delay com-
mand to change the typematic rate and delay. The
HT82K628Aresponds to the command with ACK, stops
scanning and waits for the system to issue the rate/de-
lay value byte. The HT82K628A responds to the value
byte with another ACK, sets the rate and delay to the
value indicated, and continues scanning (if it was previ-
ously enabled). Bit6 and 5 indicate the delay, and bits 4,
3,2,1and0indicatetherate.Bit7isalways0.Thedelay
is equal to 1 plus the binary value bit 6 and 5, multiplied
by 250ms 20%.
The period (interval from one typematic output to the
next) is determined by the following equation:
Period = (8+A)*(2^B)*0.00417 seconds.
Where:
A = binary value of bits 2, 1, and 0.
B = binary value of bits 4, and 3.
The typematic rate is 1 for each period and are listed as
follows:
Bit
Typematic
Rate
20%
Bit
Typematic
Rate
20%
00000
30.0
10000
7.5
00001
26.7
10001
6.7
00010
24.0
10010
6.0
00011
21.8
10011
5.5
00100
20.0
10100
5.0
00101
18.5
10101
4.6
00110
17.1
10110
4.3
00111
16.0
10111
4.0
01000
15.0
11000
3.7
01001
13.3
11001
3.3
01010
12.0
11010
3.0
01011
10.9
11011
2.7
01100
10.0
11100
2.5
01101
9.2
11101
2.3
01110
8.0
11110
2.1
01111
8.0
11111
2.0
The default values for the HT82K628A are as follows:
Typematic rate= 10.9 characters per second
20%
Delay = 500ms 20%
The execution of this command stops without change to
the existing rate if another command is received instead
of the rate/delay value byte.
F4H
Enable
Upon receipt of this command, the HT82K628A will re-
spond with ACK, clears its output buffer, clears the last
typematic key, and starts scanning.
F5H
Default Disable
The Default Disable command resets all conditions to
the power on default states. The HT82K628A will re-
spond with ACK, clears its output buffer, sets the default
key types (scan code set 3 operation only) and
typematic rate/delay, and clears the last typematic key.
The HT82K628Athen stops scanning and awaits further
command.
F6H
Set Default
The Set Default command resets all conditions to the
power on default states. The HT82K628A will respond
with ACK, clears its output buffer, sets the default key
types (scan code set 3 operation only) and typematic
rate/delay, and clears the last typematic key then contin-
ues scanning.
F7H, F8H, F9H, FAH
Set All Keys
These commands instruct the HT82K628A to set all
keys to the type listed below:
Hex Value
Command
F7
Set All Keys-Typematic
F8
Set All Keys-Make/Break
F9
Set All Keys-Make
FA
Set All Keys-Typematic/Make/Break
The HT82K628Awill respond with ACK, clears its output
buffer, sets all keys to the type indicated by this com-
mand, and continues scanning (if it was previously en-
abled). Although these commands can be sent using
anycodeset,theyaffectonlyscancodeset3operation.
FBH, FCH, FDH
Set Key Type
These commands instruct the HT82K628A to set indi-
vidual keys to the type listed below:
Hex Value
Command
FB
Set Key Type-Typematic
FC
Set Key Type-Make/Break
FD
Set Key Type-Make
The HT82K628Awill respond with ACK, clears its output
buffer and prepares to receive key identification. Key
identification is accomplished by the host identifying
each key by its scan code value as defined in scan code
set 3. Only scan code set 3 values are valid for key iden-
tification. The type of each identified key is set to the
value indicated by the command. Although these com-
mands can be sent using any code set, they affect only
scan code set 3 operation.
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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: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: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: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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