TransDimension Inc. — Proprietary
1
Description
TransDimension’s UHC124 is a four-port, single chip
USB Host controller that is the first of a family of
integrated
low-cost,
high-performance
controllers
optimized and specifically designed for embedded
systems,
mobile communication, and consumer
products. It is a non-PCI controller that supports USB
Specification Rev. 2.0 compliant full-speed (12Mb/s)
and low-speed (1.5Mb/s) USB devices. It is the only
non-PCI controller that has been proven to run at USB
full speed, even running under a full USB stack. The
UHC124 controller enables an embedded system to
function as a USB Host, dramatically expanding the
degree
of
interconnectivity
and
extending
the
applicability of USB into many new areas. In addition
to silicon, development kits, USB Host Stack, device
drivers for most products, and interface code to the
UHC124 for numerous RTOS’ are available via our
wholly owned subsidiary, SoftConnex Technologies,
Inc.
The UHC124 has unique, patent-pending features that
are indispensable for achieving high data throughput
and low interrupt rates. It is the only one on the market
that is designed from the ground up for embedded
applications with features like batch processing,
multiple interrupt modes, separate data and descriptor
memory, and double buffering. It is optimized for cost,
performance
and
ease
of
development.
The
software/hardware co-designed architecture enables
high performance while maintaining simplicity and
flexibility that are critical for embedded applications. It
can be interfaced to CISC or RISC microprocessors,
microcontrollers, or digital signal processors (DSPs)
and is ideal for providing USB host functions to a wide
range of applications including mobile devices, cell
phones, PDAs, point-of-sale systems, test equipment,
set-top boxes, Internet appliances, as well as serving
as an interface for USB to Bluetooth controllers.
The complete solutions offer the advantages of
shortened time-to-market, simplified procurement and
technical support from one source.
Features
High
performance
USB
host
controller
for
embedded applications
Supports USB Specification 2.0 compliant full-
speed (12Mb/s) and low-speed (1.5Mb/s) USB
devices
Patent pending design
Full USB bandwidth utilization with low load on
system microprocessor
Standard 8-bit microprocessor bus interface
2 Kbyte data memory
Supports all four types of USB transfers (control,
bulk, interrupt, and isochronous with maximum
packet size of 1,023 bytes)
Supports batch processing of up to 16 USB
transactions without interrupting the MCU
Supports scheduling of transaction batches that
may “spill” over the USB frame boundaries for
easy programming
Supports “in-place” processing in the data memory
– used for applications requiring peer-to-peer data
transfer between USB devices
Supports double buffering for all USB transfers
Hardware generated Start of Frame (SOF)
Fully qualified, market proven root hub with four
ports and integrated analog transceivers.
Individually controlled power-on and over-current
circuit for each of the four downstream ports
Power management with host suspend, remote
wakeup, and power saving modes
6 MHz crystal/oscillator to reduce cost and EMI
Evaulation/development kit available including C
source code of the programming interface library
and an interactive USB host controller Exerciser
Embedded RTOS software available for popular
microprocessors, RISC, CISC, and DSP’s using
WinCE, Linux, VxWorks, Nucleus, Lynx, QNX,
pSOS, PowerTV, SMX, ThreadX, VRTX, ITRON,
Symbian and MS-DOS operating systems with
more in development
Supports OHCI/UHCI compliant USB host stack
USB device driver software available including
printers, speakers, mass storage, hub, modems,
Ethernet, mouse, keyboard, digital camera, video
camera, cell phone, STB and PDA with more in
development
Industrial grade devices standard.
Military and
automotive grade devices available
Single 3.3V power supply
64 pin LQFP package
Product Brief
January 30, 2002
UHC124
High Performance Four-Port Embedded USB Host Controller
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