- 您現在的位置：買賣IC網 > PDF目錄360999 > ISP1521 (NXP Semiconductors N.V.) Hi-Speed Universal Serial Bus hub controller PDF資料下載
參數資料
| 型號： | ISP1521 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Hi-Speed Universal Serial Bus hub controller |
| 中文描述： | 高速通用串行總線控制器樞紐 |
| 文件頁數： | 11/53頁 |
| 文件大小： | 270K |
| 代理商： | ISP1521 |
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頁第49頁第50頁第51頁第52頁第53頁
Philips Semiconductors
ISP1521
Hi-Speed USB hub controller
Product data
Rev. 03 — 24 November 2004
11 of 53
9397 750 13702
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8.2.5
Hub repeater
A hub repeater is responsible for managing connectivity on a per packet basis. It
implements packet signaling connectivity and resume connectivity. There are two
repeaters in the ISP1521: a Hi-Speed USB repeater and an Original USB repeater.
The only major difference between these two repeaters is the speed at which they
operate. When the hub is connected to an Original USB system, it automatically
switches itself to function as a pure Original USB hub.
8.2.6
Hub and port controllers
The hub controller provides status report. The port controller provides control for
individual downstream facing port; it controls the port routing module. Any port status
change will be reported to the host via the hub status change (interrupt) endpoint.
8.2.7
Bit clock recovery
The bit clock recovery circuit extracts the clock from the incoming USB data stream.
8.3 Phase-locked loop clock multiplier
A 12 MHz to 480 MHz clock multiplier PLL is integrated on-chip. This allows the use
of low-cost 12 MHz crystals. The low crystal frequency also minimizes
ElectroMagnetic Interference (EMI). No external components are required for the
operation of the PLL.
8.4 I
2
C-bus controller
A simple serial I
2
C-bus interface is provided to transfer vendor ID, product ID and
string descriptor from an external I
2
C-bus EEPROM (for example, Philips PCF8582 or
equivalent) or microcontroller. A master/slave I
2
C-bus protocol is implemented
according to the timing requirements as mentioned in the I
2
C-bus standard
specifications. The maximum data count during I
2
C-bus transfers for the ISP1521 is
256 bytes.
8.5 Overcurrent detection circuit
An overcurrent detection circuit is integrated on-chip. The main features of this circuit
are: self reporting, automatic resetting, low-trip time and low cost. This circuit offers
an easy solution at no extra hardware cost on the board.
8.6 GoodLink
Indication of a good USB connection is provided through GoodLink technology. An
LED can be directly connected to pin HUBGL_N via an external 330
resistor.
During enumeration, the LED blinks on momentarily. After successful configuration,
the LED blinks off for 100 ms upon each transaction.
This feature provides a user-friendly indication of the status of the hub, the connected
downstream devices and the USB traffic. It is a useful diagnostics tool to isolate faulty
USB equipment and helps to reduce field support and hotline costs.
8.7 Power-on reset
The ISP1521 has an internal Power-On Reset (POR) circuit.
相關PDF資料 |
PDF描述 |
|---|---|
| ISP1521BE | Hi-Speed Universal Serial Bus hub controller |
| ISP1561 | ISP1561BM |
| ISP1561BM | ISP1561BM |
| ISP1562 | Hi-Speed Universal Serial Bus PCI Host Controller |
| ISP1562BE | Hi-Speed Universal Serial Bus PCI Host Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ISP1521BE | 功能描述:IC USB HUB CONTROLLER HS 80-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應商設備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
| ISP1521BE,518 | 功能描述:USB 接口集成電路 USB2 7-PORT HUB CTRLR RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1521BE,551 | 功能描述:USB 接口集成電路 USB2 7 PORT HUB RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1521BE,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 產品:USB 2.0 數據速率: 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1521BE518 | 制造商:ST-Ericsson 功能描述:IC CONTROLLER USB HUB 80LQFP |
發布緊急采購，3分鐘左右您將得到回復。