Cypress Semiconductor’s West
Bridge Antioch chip is designed to sit
between a media device CPU, a memory
storage device, and a USB host device,
providing simultaneous transfers between
each connection (see the figure). This
allows transfers to occur in a controlled
fashion so the directory on the storage
device does not get corrupted.
The chip is a tiny file server that employs
the Media Transfer Protocol (MTP), which
already is used on an array of mobile
devices. The big difference is that the west
bridge runs at High Speed USB speeds
up to 480 Mbits/s using Cypress Semiconductor’s
Turbo-MTP support. It allows
synchronization with a PC while the media
device is using data already on the storage
device. The CPU and host PC do not
access the directories or files on the storage
device directly. This permits transfers
of metadata and digital rights management
(DRM) that aren’t always available with
direct file access.
CYPRESS SEMICONDUCTOR
www.cypress.com