Design And Verification Of The USB2.0 Device Controller Integrated In PowerPC Architecture

With the extensive application of USB technology, there is a significant increase in demand for the device controller chip which is compatible with USB protocol.As the upgrade of data transmission speed of electronic system device interface, the original USB1.1 protocol (12Mb/s) has gradually been replaced by high-speed USB2.0 transfer protocol, and the interface data transfer is speeded up to 480Mb /s.Therefore, USB2.0 has become one of the standard configurations for the current electronic system device interface.This paper aims to design a USB device controller based on PowerPC architecture inside FPGA ,which is to design and implement the project how to integrate processor, USB Device IP core and other peripheral modules into a SoC (system-on-chip) chip.First,this paper introduces the relevant knowledge of a USB2.0 device controller and the FPGA Platform; and then design and verify the correctness of USB2.0 device controller;Finally, in order to integrateUSB2.0 device controller into the PowerPC architecture to implement its FPGA verification, we design a OPB to Wishbone bridge according to the transfer protocol of OPB and Wishbone bus.Then this bridge is applied to the design of USB device controller,which realize the USB device controller with OPB interface.And at last we verify that PowerPC processor can communicate with USB device controller core through the bridge. In this paper, the practical reference work is mainly in:(1) Complete the timing constraint and synthesis of USB IP core,which is to ensure the correct transfer timing between the external transceiver and USB device controller.(2) Design OPB to Wishbone Bridge according to Wishbone bus and OPB bus protocol.(3) Design and produce the external physical transceiver circuitGenerally, with much higher degree of integration of the SoC chip, operating frequency and data transmission of electronic systems equipment are much faster, and it takes less time for products to come to market.Therefore, the USB Device Interface IP core and its SoC chip integration desiged in this paper can provide a SOPC (Programmable System on Chip) technology with practical reference for electronic system equipment prototype development with standard USB2.0 interface.