Product category:
Communications ICs (Wired)
News Release from: NEC Electronics (Europe) | Subject: uPD720122
Edited by the Electronicstalk Editorial
Team on 27 March 2002
Controller runs to full USB 2.0 speeds
NEC Electronics (Europe) has launched a general purpose USB 2.0 controller chip for high-speed computer peripherals, particularly printers, scanners and digital cameras.
NEC Electronics (Europe) has launched a general purpose USB 2.0 controller chip for high-speed computer peripherals, particularly printers, scanners and digital cameras The uPD720122 becomes part of NEC's USB-IF certified family of chips and maintains compatibility with USB 1.1 standard, ensuring backward compatibility with all current USB products
This article was originally published on Electronicstalk on 16 May 2001 at 8.00am (UK)
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uPD720122 has been designed to be easy to integrate while offering facilities which increase the effective data-transfer rate achieved, such as bulk I/O buffers which accept the maximum data packet size supported by USB 2.0 and interrupt handling provided by a dedicated 8byte buffer.
A general purpose memory bus allows the uPD720122 to be connected to the peripherals' own CPUs and this bus can also be used for DMA transfers.
Both 8 and 16 bit address and databuses are supported, selected via external control pins on the uPD720122 device.
Farrukh Siddiqi, Senior Manager for Marketing and Applications at NEC Electronics (Europe) said, "NEC was first to market last year with a range of certified USB 2.0 devices and has been very successful so far.
Our host and hub controllers have been particularly well received and have been used in a wide range of plug-in cards and USB 2.0 host products".
He continued, "Now that USB 2.0 is becoming common among host devices such as PCs the pressure is now on peripheral manufacturers to make use of the increased data transfer rates available.
The explosion in digital imaging products has also added to the pressure with users acquiring, transferring and printing more high quality digital information than ever before".
Supplied in a 100-pin LQFP (14 x 20mm) package, the uPD720122 is the smallest-footprint USB 2.0 device NEC has provided to date and represents the most cost effective route to adding USB 2.0 to a peripheral.
An evaluation board (ET-0138) is available and production quantities of uPD720122 are available now.
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