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參數資料
| 型號： | 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： | 21/23頁 |
| 文件大小： | 168K |
| 代理商： | HT82K629A |
Application Circuits
Note:
For single side PCB, the GND should be routed first. Avoid routing the GND line and VDD line with jumping
wires.
The GND and VDD lines should be as wide as possible, also it is recommended that the GND and VDD lines
areplacedinanemptyarea,inordertoincreasetheirarea.WhereverpossibletheGNDplaneshouldsurround
pins such as OSCI, OSCO, VDD, V330, RESET etc and other related circuits to minimize the noise effects.
The GND/VDD loop area should be minimized. Try to keep GND and VDD lines parallel.
The external 22
ble to the VDD pin.
resistor and 0.01 F capacitor connected to the VDD pin should be placed as close as possi-
Allow room in the layout for the 0.1 F capacitor that is connected to the VDD pin. This capacitor should be con-
nectedascloseaspossibletotheVDDpin.Thefunctionofthiscapacitoristofilterouthighfrequencynoise.
The lines connecting the OSCI and OSCO pins to the crystal must be kept as short as possible to minimize any
cross coupling of noise from these pins.
The 0.1 F capacitor connected to the RESETpin should be placed as close as possible to the RESETpin. The
function of this capacitor is to filter out high frequency noise to minimize the possibility of a glitch on this line
causing a false reset.
The 0.1 F capacitor connected to the V33O pin should be placed as close as possible to the V33O pin.
The USBD+ and USBD- lines to the USB connector should be kept as short as possible and should not be
placed close to the other lines to reduce the possibility of noise coupling into other lines. The externally con-
nected 1.5k
resistor connected to the USBD- pin should be placed as close to as possible the USBD- pin.
The USB cable should preferably have proper shielding.
HT82K629A
Rev. 1.30
21
April 16, 2004
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| HT82K68A-L | Multimedia Keyboard Encoder 8-Bit MCU |
| HT82K68E-L | Multimedia Keyboard Encoder 8-Bit MCU |
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| HT82K68 | Multimedia Keyboard Encoder OTP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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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