- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄360998 > ISP1122BD (NXP SEMICONDUCTORS) Universal Serial Bus stand-alone hub PDF資料下載
參數(shù)資料
| 型號(hào)： | ISP1122BD |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線控制器 |
| 英文描述： | Universal Serial Bus stand-alone hub |
| 中文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PQFP32 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-358-1, LQFP-32 |
| 文件頁數(shù)： | 11/48頁 |
| 文件大?。?/td> | 1159K |
| 代理商： | ISP1122BD |
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頁當(dāng)前第11頁第12頁第13頁第14頁第15頁第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
Philips Semiconductors
ISP1122
USB stand-alone hub
Product specification
Rev. 03 — 29 March 2000
11 of 48
9397 750 07002
Philips Electronics N.V. 2000. All rights reserved.
8.
Endpoint descriptions
Each USB device is logically composed of several independent endpoints. An
endpoint acts as a terminus of a communication flow between the host and the
device. At design time each endpoint is assigned a unique number (endpoint
identifier, see
Table 5
). The combination of the device address (given by the host
during enumeration), the endpoint number and the transfer direction allows each
endpoint to be uniquely referenced.
The ISP1122 has two endpoints, endpoint 0 (control) and endpoint 1 (interrupt).
[1]
IN: input for the USB host; OUT: output from the USB host.
8.1 Hub endpoint 0 (control)
All USB devices and functions must implement a default control endpoint (ID = 0).
This endpoint is used by the host to configure the device and to perform generic USB
status and control access.
The ISP1122 hub supports the following USB descriptor information through its
control endpoint 0, which can handle transfers of 64 bytes maximum:
Device descriptor
Configuration descriptor
Interface descriptor
Endpoint descriptor
Hub descriptor
String descriptor.
8.2 Hub endpoint 1 (interrupt)
Endpoint 1 is used by the ISP1122 hub to provide status change information to the
host. This endpoint can be accessed only after the hub has been configured by the
host (by sending the Set Configuration command).
Endpoint 1 is an interrupt endpoint: the host polls it once every 255 ms by sending an
IN token. If the hub has detected no change in the port status it returns a NAK (Not
AcKnowledge) response to this request, otherwise it sends the Status Change byte
(see
Table 6
).
Table 5:
Function
Hub endpoints
Ports
Endpoint
identifier
Transfer
type
Direction
[1]
Max. packet
size (bytes)
64
64
1
Hub
0: upstream
1 to 5: downstream
0
control
OUT
IN
IN
1
interrupt
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISP1122D | Universal Serial Bus stand-alone hub |
| ISP1122NB | Universal Serial Bus stand-alone hub |
| ISP1123BD | CAP .068UF 100V PPS FILM ECH-S |
| ISP1123 | Universal Serial Bus compound hub |
| ISP1123D | Universal Serial Bus compound hub |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISP1122D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub |
| ISP1122NB | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub |
| ISP1123 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub |
| ISP1123BD | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub |
| ISP1123D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。