用4BIT OTP单片机实现USB/PS2 MOUSE的设计 USB 低速设备的设计发展到现在已经有了相当的成熟度。 各家IC公司都推出了USB DEVICE端的解决方案, 一般以8 BIT CPU CORE + USB SIE为主流构架。 SH69P04是中颖电子(Sinowealth)本着丰富USB产品应用,降低USB IC成本而设计的4BIT OTP单片机, 用以开发USB DEVICE设备。-the design of usb or PS2 mouse

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

M1533: PCI-to-ISA Bus Bridge The M1533 is a bridge between PCI and ISA bus, providing full PCI and ISA compatible functions. The M1533 has Integrated System Peripherals (ISP) (2 x 82C59 and Serial interrupt, 1 x 82C54), advanced features (Type F