- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361591 > uPSD3234 (意法半導(dǎo)體) 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) PDF資料下載
參數(shù)資料
| 型號(hào)： | 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)： | 16/54頁 |
| 文件大小： | 736K |
| 代理商： | UPSD3234 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當(dāng)前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁
AN1886 - APPLICATION NOTE
16/54
A device may return class- or vendor-specific descriptors in two ways.
If the class or vendor specific descriptors use the same format as standard descriptors (for example,
they start with a length byte, followed by a type byte), they may be returned interleaved with standard
descriptors in the configuration information returned by a GetDescriptor(Configuration) request. In this
case, the class or vendor-specific descriptors typically follow a related standard descriptor that they
modify or extend.
If the class or vendor specific descriptors are independent of configuration information, or use a non-
standard format, a GetDescriptor() request specifying the class or vendor specific descriptor type and
index may be used to retrieve the descriptor from the device. A class or vendor specification will define
the appropriate way to retrieve these descriptors.
GET_Descriptor Request Servicing Routine
The
Get_descriptor
request is serviced in
uPSD_USB.c/OnGetDescriptor
routine. This routine is shown
in
APPENDIX D.
.
Descriptors
The format of all USB descriptors is given by the USB specification standards, and all the descriptors can
be found in file
USB_DESC.C
. This can have the following content:
■
■
const uchar code string1Desc[];
const uchar code string2Desc[];
const uchar code string3Desc[];
const uchar code stringXDesc[];
Next, the
Report
descriptor contains the HID report information that is shown in
APPENDIX E.
.
The descriptor area can also contain physical descriptors. A physical descriptor is a data structure that
provides information about the specific part, or parts, of the human body that are activating a control or
controls. For example, a physical descriptor might indicate that the right hand thumb is used to activate
button 5. An application can use this information to assign functionality to the controls of a device. Note
that physical descriptors are entirely optional. They add complexity, and offer very little in return for most
devices. However, some devices, particularly those with a large number of identical controls (for example,
buttons) will find that physical descriptors help different applications assign functionality to these controls
in a more consistent manner. See the HID standard for more information. In the USB demonstration pro-
gram, it is defined as an empty descriptor:
const uchar code PhysicalReportDesc[] =
{
0,0,0 // no physical descriptor defined now
};
const uchar code PhysicalReportDescSize = sizeof(PhysicalReportDesc);
Next, the
Device
descriptor contains detailed information about the USB device, and supported endpoints.
This routine is shown in
APPENDIX F.
.
Next, each of the String descriptors contains important strings defining the USB device. String descriptors
are optional. As noted previously, if a device does not support string descriptors, all references to string
descriptors within device, configuration, and interface descriptors must be reset to zero. String descriptors
use
Unicode
encoding
.
The strings in a USB device may support multiple languages. When requesting a
string descriptor, the requester specifies the desired language using a sixteen-bit language
ID (LANGID)
defined by
Microsoft for Windows
as described in
Developing International Software for Windows 95 and
Windows NT.
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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。