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參數(shù)資料
| 型號： | uPSD3234 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Flash Programmable System Device with 8032 Microcontroller Core(嵌入高速“8032微控制器核”的Flash型可編程系統(tǒng)器) |
| 中文描述： | 閃存可編程系統(tǒng)器件與8032微控制器內(nèi)核（嵌入高速“8032微控制器核”的閃存型可編程系統(tǒng)器） |
| 文件頁數(shù)： | 34/54頁 |
| 文件大小： | 736K |
| 代理商： | UPSD3234 |
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AN1886 - APPLICATION NOTE
34/54
Figure 9. USB ISR Response Time - Detail
Problems with Windows98 and Multiple-function USB Devices
This has already been treated at the Microsoft web site (
Q249635
).
Symptoms.
Multiple function Universal Serial Bus (USB) devices that support multiple packet sizes send
DATA0
and
DATA1
packets using the largest supported data field size rather than the smallest required.
Each supported function of the USB device should send
DATA0
and
DATA1
packets using the smallest
required data field size. The overall performance of a multiple-function device is decreased because more
data is sent over the USB device.
Cause.
This behavior occurs because the
HIDclass
driver in Windows 98 Second Edition always uses
the largest data field the USB device supports to transmit packets. This behavior causes the USB device
to transmit unneeded data during an IN or OUT transaction.
Conclusion.
A supported fix is now available from Microsoft. Apply it only to computers that are experi-
encing this specific problem. It is only intended to correct the problem that is described in this article, and
for the following edition of Windows 98 Second Edition:
Microsoft Windows 98 Second Edition
Last Reviewed: 5/8/2002 (1.0)
Keywords: kbbug KB249635
To resolve the problem, contact Microsoft Product Support Services to obtain the fix. For a complete list
of Microsoft Product Support Services ‘phone numbers and information about support costs, visit the Mi-
crosoft web site.
NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Mi-
crosoft Support Professional determines that a specific update will resolve your problem. The usual sup-
port costs will apply to additional support questions and issues that do not qualify for the specific update
in question.
The English-language version of this fix should have the following file attributes, or later:
Date Time Version Size File name Platform
----------------------------------------------------------------------------------
1/10/2000 6:05pm 4.10.2223 23,584 Hidclass.sys Windows 98 Second Edition
Status.
Microsoft has confirmed that this is a problem in Windows 98 Second Edition.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| uPSD3251(中文) | Flash Programmable System Devices with 8032 Microcontroller Core(帶8032微控制器內(nèi)核的Flash可編程系統(tǒng)設(shè)備) |
| uPSD3251 | Flash Programmable System Devices with 8032 Microcontroller Core(帶8032微控制器內(nèi)核的Flash可編程系統(tǒng)設(shè)備) |
| uPSD3253AV-24T1T | Flash Programmable System Devices with 8032 Microcontroller Core |
| UPSD3253B | Two and Three Channel Codewheels |
| UPSD3253BV | Flash Programmable System Devices with 8032 Microcontroller Core |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPSD32348V24V6ES | 制造商:ST MICRO 功能描述:* |
| UPSD3234A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core |
| UPSD3234A-24T1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
| UPSD3234A-24T1T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core and 64Kbit SRAM |
| UPSD3234A-24T6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
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