MC141556数据手册恩XP中文资料规格书

描述 Description

Overview This device is a self-contained USB Hub which complies with USB Hub spec Rev 1.0. This device is used to expand the USB ports of your PC system while needed. Because of its self-contained and bus-powered/self-powered capabil-ity, it can hide the complexity from the user and be flexibly placed anywhere, such as monitor, keyboard, motherboard, hub-box, etc. The MC141556 con-sists of Serial Interface Engine(SIE), Hub Repeater, and Hub Controller, sup-porting one upstream port and up to five downstream ports. It also provides optional IIC(M_BUS) programmable Vendor ID and Product ID. Both Low speed mode (1.5 Mbps) and Full speed mode (12 Mbps) are sup-ported by automatically detecting which data line (D+ or D-) is pulled high whenever downstream devices are connected to the bus or at power-up. MC141556 can be self-powered or bus-powered. When self-powered, MC141556 is powered by external 5 volt supply and capable of delivering 500mA current to each downstream port. Power management for all down-stream ports supports power-switching and overcurrent detection with Individ-ual or Ganged control; a self-powered MC141556 supports Individual control only, but bus-powered MC141556 supports either Individual or Ganged control. When Ganged control, PWRSW1 and OVR1 are dedicated for power manage-ment. IIC(M_BUS) interface is provided to set up customized Vendor ID, Product ID, Power Mode, Power Management Mode, Number of Downstream Ports and Overcurrent Debounce Setting.

特性 Features

\t•Self-contained Hub Includes Serial Interface Engine (SIE), Hub Repeater
and Hub Controller
\t•Universal Serial Bus (USB) Hub Version 1.0 Compliant
\t•One Upstream Port and Up To Five Downstream Ports
\t•Self-powered or Bus-powered
\t•Individual/Ganged Downstream Port Power Switching
\t•Individual/Ganged Downstream Port Overcurrent Detection
\t•All Downstream Ports Support Full Speed and Low Speed Operation
\t•Suspend and Resume Operations
\t•Host Reset Operation
\t•IIC (M_BUS) interface

General Characteristics

\t•28 DIP Package
\t•Crystal Input 24MHz
\t•Internal 3.3Volt Regulator
\t•Single 5Volt Power Supply
\t•Low-power CMOS Technology