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| 型号： | ISP1520BD,557 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 总线控制器 |
| 英文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PQFP64 |
| 封装： | 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64 |
| 文件页数： | 7/54页 |
| 文件大小： | 288K |
| 代理商： | ISP1520BD,557 |
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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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| ISP1520BD,557 | UNIVERSAL SERIAL BUS CONTROLLER, PQFP64 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISP1520BDGA | 功能描述:IC USB HUB CONTROLLER HS 64-LQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 专用 系列:- 标准包装:3,000 系列:- 应用:PDA，便携式音频/视频，智能电话 接口:I²C，2 线串口 电源电压:1.65 V ~ 3.6 V 封装/外壳:24-WQFN 裸露焊盘 供应商设备封装:24-QFN 裸露焊盘（4x4） 包装:带卷 (TR) 安装类型:表面贴装 产品目录页面:1015 (CN2011-ZH PDF) 其它名称: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 接口集成电路 USB2 4 PORT HUB RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20 |
| ISP1520BDUM | 功能描述:IC USB HUB CONTROLLER HS 64-LQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 专用 系列:- 标准包装:3,000 系列:- 应用:PDA，便携式音频/视频，智能电话 接口:I²C，2 线串口 电源电压:1.65 V ~ 3.6 V 封装/外壳:24-WQFN 裸露焊盘 供应商设备封装:24-QFN 裸露焊盘（4x4） 包装:带卷 (TR) 安装类型:表面贴装 产品目录页面:1015 (CN2011-ZH PDF) 其它名称:296-25223-2 |
| ISP1521 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:IC USB HUB CONTROLLER HS 80-LQFP |
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