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User's Guide
Universal Serial Bus (USB) Controller
1Introduction
This document describes the universal serial bus (USB) controller in the TMS320DM357 Digital Media
Note: The
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1.1Purpose of the Peripheral
The USB controller supports data throughput rates up to 480 Mbps. It provides a mechanism for data transfer between USB devices and also supports host negotiation.
1.2Features
The USB has the following features:
∙Supports USB 2.0 peripheral at High Speed (480 Mbps) and Full Speed (12 Mbps)
∙Supports USB 2.0 host at High Speed (480 Mbps), Full Speed (12 Mbps), and Low Speed (1.5 Mbps)
∙Supports USB 2.0 OTG
∙Supports four simultaneous RX and TX endpoints, more can be supported by dynamically switching
∙Each endpoint can support all transfer types (control, bulk, interrupt, and isochronous)
∙Supports USB extensions for Session Request (SRP) and Host Negotiation (HNP)
∙Includes a 4K endpoint FIFO RAM, and supports programmable FIFO sizes
∙External 5V power supply for VBUS can be controlled through I2C
∙Includes a DMA controller that supports four TX and four RX DMA channels
∙Includes RNDIS mode of DMA for accelerating RNDIS type protocols using short packet termination over USB
1.3Features Not Supported
The following features are not supported:
∙High Bandwidth Isochronous Transfer.
∙High Bandwidth Interrupt Transfer.
∙Automatic Amalgamation of Bulk Packets (CPPI DMA will indirectly handle this feature and is not supported at the core level).
∙Automatic Splitting of Bulk Packets (CPPI DMA will indirectly handle this feature and is not supported at the core level).
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