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OXU140CM Datasheet(PDF) 2 Page - Oxford Semiconductor

Part # OXU140CM
Description  USB On-The-Go Full Speed Host, High Speed Peripheral with Multi-Storage Interface
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Manufacturer  OXFORD [Oxford Semiconductor]
Direct Link  http://www.oxsemi.com
Logo OXFORD - Oxford Semiconductor

OXU140CM Datasheet(HTML) 2 Page - Oxford Semiconductor

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External--Free Release
DS-0038 Jul 06
OXU140CM Data Sheet
Oxford Semiconductor, Inc.
16 Kbytes of on‐chip SRAM, optimized buffer size for 
performance and cost
USB peripheral allows up to 8 bi‐directional endpoints and 
transfers to enable support for multi‐function systems
Host Negotiation Protocol and Session Request Protocol 
implemented in hardware
Transaction scheduling and transfer level protocol implemented 
in hardware (including data toggle, retry, and bandwidth 
management) for high performance
Device
Overview
The Oxford Semiconductor OXU140CM is a single‐chip USB On‐The‐Go 
(OTG) controller that incorporates a full‐speed host, a high‐speed 
peripheral controller, and a multi‐storage interface that supports the 
following technologies:
Consumer electronics advanced technology attachment 
(CE‐ATA) HDDs
MultiMediaCard (MMC)
Secure Digital (SD)
The high‐speed peripheral port offers high‐data‐rate transfers to and 
from host PCs. This is essential for devices such as smart phones, 
portable media players, car audio/navigation units, and personal storage 
devices, where media transfer times greatly impact the user experience. 
The full‐speed host port enables the connection of a wide range of 
devices, such as flash drives, keyboards, mice, and digital still cameras. 
The OXU140CM low‐power design is ideal for extending the battery life 
in mobile applications.
The multi‐storage interface provides glueless support for CE‐ATA hard 
drives. This new class of drives is designed for lower pin count, better 
power utilization, and a more efficient command protocol than existing 
hard drives, making it ideal for portable applications. The interface also 
supports MMC and SD flash memory devices, providing additional 
product flexibility in memory capacity expansion. The OXU140CM 
implements fast bridging between the USB peripheral port and the 
multi‐storage interface, improving data transfer rates and minimizing 
CPU utilization.
The OXU140CM allows for simultaneous host and peripheral operation. 
The ports can be configured in one of two modes:
One OTG port and one full‐speed host port
One high‐speed peripheral port and two full‐speed host ports
The multi‐storage interface can be used in conjunction with either mode.


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