The KL5KUSB102 design provides the smallest available solution for connectivity between USB and Ethernet with PHY. This has been accomplished by its highly integrated functionality. The USB controller consists of a central 16-bit processor, mask ROM, RAM buffer, clock generator, Ethernet interface, UART, IRQ, Watchdog Timer, Serial interface, SRAM and PHY. The SIE (Serial Interface Engine) is fully compatible with the USB specification. This USB to Ethernet controller is ideal for LAN (Local Area Network), HAN (Home Area Network), Cable Modem, Set Top Boxes, or Mobile Networking applications.