Introduction
Cypress’s EZ-USB FX3 is the USB 3.0 peripheral controller that allows developers to add USB 3.0 functionality to any system. The controller works well with applications such as imaging and video devices, printers, scanners, and data acquisition systems.
EZ-USB FX3 has a fully configurable, parallel general programmable interface, called GPIF II, that can connect to any processor, ASIC, or FPGA. A popular implementation of GPIF II is the Slave FIFO interface, designed for applications where the external device connected to FX3 addresses the FIFOs in FX3, reading from or writing data to them.
AN68829 discusses the asynchronous and synchronous Slave FIFO interfaces for the EZ-USB FX3 SuperSpeed USB controller. This application note also describes the mode in which the interface supports a 5-bit address bus and lets you access all 32 internal sockets of EZ-USB FX3.