參數(shù)資料
型號： ISP1520BD
廠商： NXP SEMICONDUCTORS
元件分類： 總線控制器
英文描述： Hi-Speed Universal Serial Bus hub controller
中文描述： UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封裝： 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64
文件頁數(shù)： 22/51頁
文件大小： 259K
代理商： ISP1520BD
Philips Semiconductors
ISP1520
Hi-Speed USB hub controller
Product data
Rev. 02 — 04 May 2004
22 of 51
9397 750 11689
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
10. Hub controller description
Each USB device is composed of several independent logic endpoints. An endpoint
acts as a terminus of communication flow between the host and the device. At design
time, each endpoint is assigned a unique number (endpoint identifier; see
Table 13
).
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 ISP1520 has two endpoints: endpoint 0 (control) and endpoint 1 (interrupt).
[1]
IN: input for the USB host; OUT: output from the USB host.
10.1 Endpoint 0
According to the USB specification, all devices must implement a default control
endpoint. This endpoint is used by the host to configure the USB device. It provides
access to the device configuration and allows generic USB status and control access.
The ISP1520 supports the following descriptor information through its control
endpoint 0:
Device descriptor
Device_qualifier descriptor
Configuration descriptor
Interface descriptor
Endpoint descriptor
Hub descriptor
Other_speed_configuration descriptor.
The maximum packet size of this endpoint is 64 bytes.
10.2 Endpoint 1
Endpoint 1 can be accessed only after the hub has been configured by the host (by
sending the Set Configuration command). It is used by the ISP1520 to send the
status change information to the host.
Endpoint 1 is an interrupt endpoint. The host polls this endpoint once every 255 ms.
After the hub is configured, an IN token is sent by the host to request the port change
status. If the hub detects no change in the port status, it returns a NAK to this
request, otherwise the Status Change byte is sent.
Table 14
shows the content of the
change byte.
Table 13:
Function
Hub endpoints
Endpoint
identifier
0
Transfer type
Direction
[1]
Maximum packet
size (bytes)
64
64
1
Hub ports 0 to 4
control
OUT
IN
IN
1
interrupt
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISP1520BD,518 功能描述:USB 接口集成電路 USB2 4 PORT HUB RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1520BD,551 功能描述:USB 接口集成電路 USB2 4-PORT HUB CTRLR RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1520BD,557 功能描述:USB 接口集成電路 DO NOT USE ORDER -S OR -T PART RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1520BD518 制造商:ST-Ericsson 功能描述:IC CONTROLLER USB HUB 64-LQFP
ISP1520BDGA 功能描述:IC USB HUB CONTROLLER HS 64-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標準包裝:3,000 系列:- 應(yīng)用:PDA，便攜式音頻/視頻，智能電話 接口:I²C，2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2
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