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Transdimension - Single Chip Host/Peripheral Controller

Numéro de référence TDOTG242-00BC
Description Single Chip Host/Peripheral Controller
Fabricant Transdimension 
Logo Transdimension 





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TDOTG242-00BC fiche technique
Datasheet
March 22, 2004
MU4001, Rev 1.1
TD242LP
USB On-The-Go Low Power, Two Port, Single Chip Host/Peripheral Controller
Description
TransDimension’s TD242LP is a Low Power, single
chip USB Host and Peripheral controller that is the
second controller in the family of integrated low-cost,
high-performance, On-the-Go (OTG) controllers
optimized and specifically designed for embedded
systems, peripherals, mobile communication, and
www.DataShceoent4sUu.mcoemr products. The TD243 was the first controller
in the USB OTG family delivered to the market by
TransDimension. The TD242LP is a combination of a
standard USB Host controller and an OTG Dual-Role
Device controller. The TD242LP enables any
embedded system to operate as a USB Host and
Peripheral, thereby dramatically expanding the degree
of interconnectivity and extending the applicability of
USB into many new areas, especially low power,
mobile markets. Software support for the TD242LP is
available from SoftConnex Technologies, Inc., a wholly
owned subsidiary of TransDimension Inc., and
includes USBLink OTG Stack, ported to a wide variety
of RTOSs, interface code to the TD242LP and USB
device drivers. Peer-to-Peer connectivity is made
simple with the TD242LP since USB connectivity is
achieved without PC intervention. Applications include
mobile and post-PC products such as cellular phone,
palmtop PC, PDA, MP3 players, projectors, and
Internet appliances, to name a few. The TD242LP can
operate in the following modes:
USB On-the-Go Dual-Role Device: One OTG port
plus a standard USB host with one downstream
port
Simultaneous standard USB host with one
downstream port and one USB peripheral
upstream port
Standard USB host with two downstream ports
The host controller in the TD242LP is the only true
transfer level embedded USB host and On-the-Go
controller that can be interfaced directly to most
popular microprocessors and is easily programmable.
The active endpoint and transfer descriptors are
located in the on-chip memory, thus significantly
reducing processor overhead relative to any
comparable product on the market.
The full speed peripheral controller is very flexible and
software configurable, in terms of the active bi-
directional endpoint number (12), type, size, and
buffering mechanism of each endpoint.
Features
Concurrent operation of On-The-Go, Host and
Peripheral ports
Fully compliant with USB On-the-Go specification
and USB Specification Rev. 2.0 for full-speed
(12Mb/s) and low-speed (1.5Mb/s) USB devices
High-performance USB host: Full USB bandwidth
utilization with low load on system microprocessor
without bus mastering
Transaction scheduling and transfer level protocol
implemented in hardware including bandwidth
management, data toggle and retry
Isochronous transfer with loose timing
requirements on the microprocessor
Fast microprocessor access cycle (~25MB/s for
16-bit data bus)
Double/multi buffering support for all four types of
USB transfers
Separate transfer descriptor and data memory
space
Capable of supporting up to 500mA to peripherals
when using external 5V power supply from an
external charge pump
No built-in charge pump leads to smaller die size
and more cost savings
Integrated on-chip pull-up and pull-down resistors
Power saving mode for whole chip and host
controller, and suspend mode for peripheral
controller
Integrated PLL supports external crystal or crystal
oscillators of 6MHz, 12MHz, 24MHz, and 48MHz
Single 3.3V power supply, 2.5V to 3.3 V I/O
(LVCMOS/TTL), 5 V tolerant
Software and hardware Host Negotiation Protocol
Session Request Protocol
Direct interface to microprocessors, RISC, CISC,
and DSPs including but not limited to x86, Intel
XScale & StrongARM, Hitachi SH3, Fujitsu
SPARCLite, NEC and Toshiba MIPS, ARM7,
TransDimension Inc. — Proprietary

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