參數(shù)資料
型號： ISP1520BD,557
廠商： ST-ERICSSON
元件分類： 總線控制器
英文描述： 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)： 7/54頁
文件大小： 288K
代理商： ISP1520BD,557
ISP1520_4
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 04 — 28 April 2006
14 of 53
Philips Semiconductors
ISP1520
Hi-Speed USB hub controller
8.1.4 Nonremovable port
A nonremovable port, by denition, is a port that is embedded inside the hub application
box and is not externally accessible. The LED port indicators (pins AMBn_N) of such a
port are not used. Therefore, the corresponding amber LED port indicators are disabled to
signify that the port is nonremovable; see Table 8.
More than one nonremovable port can be specied by appropriately connecting the
corresponding amber LED indicators. At least one port should, however, be left as a
removable port.
The detection of any nonremovable port sets the hub descriptor to a compound hub.
8.1.5 Port indicator support
The port indicator support can be disabled by grounding all green port indicators (all
pins GRNn_N); see Table 9. This is a global feature. You cannot disable port indicators for
only one port.
8.2 Device descriptors and string descriptors settings using I2C-bus
8.2.1 Background information on I2C-bus
The I2C-bus is suitable for bidirectional communication between ICs or modules. It
consists of two bidirectional lines: SDA for data signals, and SCL for clock signals. Both
these lines must be connected to a positive supply voltage through a pull-up resistor.
The basic I2C-bus protocol is dened as:
Data transfer is initiated only when the bus is not busy.
Changes in the data line occur when the clock is LOW, and must be stable when the
clock is HIGH. Any changes in data lines when the clock is HIGH will be interpreted as
control signals.
8.2.1.1
Different conditions on I2C-bus
The I2C-bus protocol denes the following conditions:
Not busy — both SDA and SCL remain HIGH.
START — a HIGH-to-LOW transition on SDA, while SCL is HIGH.
STOP — a LOW-to-HIGH transition on SDA, while SCL is HIGH.
Data valid — after a START condition, data on SDA must be stable for the duration of the
HIGH period of SCL.
Table 8.
Nonremovable port pin conguration
AMBn_N (n=1to4)
Nonremovable port
Ground
nonremovable
Pull-up with amber LED
removable
Table 9.
Port indicator support: pin conguration
GRN1_N to GRN4_N
Port indicator support
Ground
not supported
LED pull-up green LED for at least one port
supported
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相關代理商/技術(shù)參數(shù)
參數(shù)描述
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 供應商設備封裝: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
ISP1520BD-S 制造商:ST-Ericsson 功能描述:Universal Serial Bus Hub Controller 64-Pin LQFP
ISP1520BD-T 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1520BDUM 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 供應商設備封裝: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
ISP1521 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:IC USB HUB CONTROLLER HS 80-LQFP
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