Overview
The AL-USB2D-CTRL fully synthesizable core implements a complete high/full-speed (480Mbps/12Mbps) peripheral controller that interfaces to a UTMI USB port transceiver on one side and to a system's microprocessor on the other. It is user-configurable for up to 15 IN and OUT endpoints, and includes power management and remote wake-up functions.
Options include a protocol aware DMA controller, support for a variety of widely used bus interfaces, and a UTMI Low Pin Interface (ULPI).
Designed for easy reuse in ASIC and FPGA implementations, the microcode-free design is strictly synchronous with positive-edge clocking, no internal tri-states and a synchronous reset; therefore scan insertion is straightforward. The core has been optimized and silicon proven on Xilinx and Altera FPGAs.
Block Diagram
Features
- USB 2.0 compliant device.
- ULPI/ UTMI interface to the external PHY
- 32bit Avalon or AHB slave interface to application.
- Supports high speed (480Mbps), full speed (12Mbps) bit rates.
- Supports Control, Bulk, Interrupt and Isochronous transfers.
- Remote wake-up function capable.
- Performs CRC check/generation.
- Performs PID verification, address recognition and handshake evaluation and response.
- Decodes and handles standard USB commands.
- Endpoints, their parameters and FIFO densities are configurable.
- Preconfigured for 3 endpoints (control, bulk in, bulk out)
- Software/ Hardware controlled enumeration.
- Compact plug-in solution for SOC applications.