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PPU
RAM
RNDIS
RX
SCR
SOC
SOP
SRP
TX
USB
USB0
USB1
USBSS
UTMI
XDMA
20.1.3 Features Supported
The main features of the USB Subsystem are:
•
Has two USB modules where each USB module is built around a mentor USB controller and
Synopsys PHY.
•
Includes SR70LX Synopsys USB 2.0 OTG nanoPHY per module in C014.P process.
•
Supports USB 2.0 device operations at HS (480 Mb/s) and FS (12 Mb/s).
•
Supports USB 2.0 Host operations at HS (480 Mb/s), FS (12 Mb/s) and LS (1.5Mb/s).
•
Supports all modes of transfers (control, bulk, interrupt, and isochronous) in both host and device
mode.
•
Supports high bandwidth ISO mode.
•
Supports 15 Transmit (Tx) and 15 Receive (Rx) Endpoints including Endpoint 0.
•
Includes a 32KB Endpoint FIFO RAM per Module (64Kbytes per USB Subsystem) with user
programmable FIFO sizes.
•
Includes RNDIS mode for accelerating RNDIS type protocols using short packet termination over
USB.
•
Includes CDC Linux mode for accelerating CDC type protocols using short packet termination over
USB.
•
Includes Generic RNDIS mode, an RNDIS like mode for terminating RNDIS type protocols without
using short packet termination for support for MSC class applications.
•
Includes a CPPI 4.1 compliant DMA controller sub-module with 30 Rx and 30 Tx simultaneous data
connections/channels.
•
Includes CPPI 4.1 DMA scheduler.
•
DMA supports host and packet descriptors formats.
•
DMA supports stall on buffer starvation.
•
DMA supports capability of allocating data buffer sizes up to 4Mbytes per single transfer.
•
Provides a CPPI Queue Manager Module with 156 Queues for Queueing and De-Queueing packets.
•
Supports DMA pacing logic for interrupts.
•
Supports Loopback MGC test using at the UTMI interface level.
SPRUGX9 – 15 April 2011
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Preliminary
Packet Processing Unit
Random Access Memory
Remote Network Driver Interface Specification
Receive
Switched Central Resource
System On a Chip
Start of Packet
Session Resume
Transmit
Universal Serial Bus
One of the two USB 2.0 Compliant USB Module
One of the two USB2.0 Compliant USB Module
USB Subsystem (contains USB0 and USB1)
USB 2.0 Transceiver Macrocell Interface
Transfer DMA (DMA other than CPPI DMA used within the Controller)
© 2011, Texas Instruments Incorporated
Introduction
1753
Universal Serial Bus (USB)
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