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USB资料大集合，包含USB入门系列资料，usb设计原理图，USB数据采集和控制系统的原理图和应用程序，USB 电路设计方案和开发板例程源码。-Large collection of USB data, including the series of USB data entry, usb design schematics, USB data acquisition and control system schematic diagram and applications, USB circu

M1543: Desktop South Bridge The M1543 is a bridge between PCI and ISA bus, providing full PCI and ISA compatible functions. The M1543 has Integrated Super I/O( Floppy Disk Controller, 2 serial ports/1 parallel port ), System Peripherals (ISP) (2