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參數(shù)資料
| 型號(hào)： | HT82K629A |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Windows 2000 USB+PS/2 Keyboard Encoder |
| 中文描述： | Windows 2000中的USB PS / 2鍵盤編碼器 |
| 文件頁數(shù)： | 5/23頁 |
| 文件大小： | 168K |
| 代理商： | HT82K629A |
HT82K629A
Rev. 1.30
5
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
HT82K629Aresponds to the command with ACK, stops
scanning and waits for the system to issue the rate/de-
lay value byte. The HT82K629A 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). Bits 6 and 5 indicate the delay, and bits
4, 3, 2, 1 and 0 indicate the rate. Bit7 is always 0. The
delay is equal to 1 plus the binary value bit 6 and 5, mul-
tiplied 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 HT82K629A are as follows:
Typematic rate= 10.9 characters per second
20%
Delay = 500ms 20%
The execution of this command stops without changes
to the existing rate if another command is received in-
stead of the rate/delay value byte.
F4H
Enable
Upon receipt of this command, the HT82K629A 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 HT82K629A will
respond with ACK, clears its output buffer, sets the de-
fault typematic rate/delay, and clears the last typematic
key. The HT82K629A then stops scanning and awaits
further command.
F6H
Set Default
The Set Default command resets all conditions to the
power on default states. The HT82K629A will respond
with ACK, clears its output buffer, sets the default key
typematic rate/delay, and clears the last typematic key
then continues scanning.
F7H, F8H, F9H, FAH
Set All Keys
Since HT82K629A do not support keyboard code set 3
format, so it will not acknowledge the command but re-
turns a Resend command and continues in its previous
scanning state.
FBH, FCH, FDH
Set Key Type
Since HT82K629A do not support keyboard code set 3
format, so it will not acknowledge the command but re-
turns a Resend command and continues in its previous
scanning state.
FEH
Resend
Thehostsendsthiscommandwhenitdetectsanerrorin
anytransmissionfromtheHT82K629A.Itissentonlyaf-
ter a data transmission and before the host allows the
next data output. When a Resend is received, the
HT82K629A sends the previous output again (unless
the previous output was Resent, in which case the
HT82K629A sends the last byte before the Resend
command).
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PDF描述 |
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| HT82K68A-L | Multimedia Keyboard Encoder 8-Bit MCU |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| HT82K68 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Multimedia Keyboard Encoder OTP |
| HT82K68A | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Multimedia Keyboard Encoder Body |
| HT82K68A_01 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit Multimedia Keyboard Encoder Mask MCU |
| HT82K68A-L | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Multimedia Keyboard Encoder 8-Bit MCU |
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