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.
2
External--Free Release
DS-0038 Jul 06
OXFORD [ OXFORD SEMICONDUCTOR ]
