USB 1.1 Host Controller IP

Overview

The USB Host, as defined by the OHCI specification, is a hardware controller designed to manage communication between a host system and USB 1.1 devices. It supports Full-Speed (12 Mbps) and Low-Speed (1.5 Mbps) data rates and handles all four USB transfer types: Control, Bulk, Interrupt, and Isochronous. Key features include frame-based scheduling for periodic transfers, efficient memory management using linked descriptors, robust interrupt handling, and integrated error detection and recovery. The host includes a built-in root hub for managing downstream ports, with support for power management and device suspend/resume. Its standards-based design ensures seamless compatibility with USB 1.1 devices and operating systems.

This architecture ensures reliable, high-performance USB communication while maintaining flexibility for various host system requirements. Let me know if you’d like to explore any feature in greater detail!

Benefits

Efficient scheduling and transfer handling.
Comprehensive interrupt and error management.
Seamless integration with USB 1.1 devices.
Robust root hub functionality for managing downstream ports.

Block Diagram

Deliverables

USB 1.1 Support: Full-Speed (12 Mbps) and Low-Speed (1.5 Mbps).
Transfer Types: Control, Bulk, Interrupt, and Isochronous transfers.
Frame-Based Scheduling: 1ms frames for precise periodic transfer timing.
Memory Management: Linked descriptors (EDs/TDs) for efficient data handling.
Interrupt Handling: Fine-grained control for transfer events and status changes.
Error Detection: Handles CRC, timeout, and toggle errors with retry mechanisms.
Integrated Root Hub: Manages downstream ports with power and connection control.
Power Management: Global or per-port power switching, suspend/resume support.
Standards-Based: Fully compliant with USB 1.1 and OHCI specifications.
AMBA AXI Master: for data transfer and linked descriptor management
AMBA AXI slave: for Host internal register access

Technical Specifications

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