Online Development Notebook > Index > Products

USBmicro Products


U401 USB I⁄O Interface

Newest U401 (Rev 3) front view. This newest U401 has a lightweight  and removable USB cable.

(Older board revisions, below)

U401 front view, older style with DIP U401 chip.

U401 back view, newer style with surface-mount U401 chip.

USBmicro has released the U401 USB Interface, a fully assembled and tested device to interface to your PC (Win⁄Linux) or Mac (OSX) via USB. The U401 is in a "SimmStick" format. Please see the FAQ for differences in the components used in the pictures.

U421 USB I⁄O Interface



U421 top view.

USBmicro also has the U421 USB Interface. This is also a fully assembled and tested device to interface to your PC (Win⁄Linux) or Mac (OSX) via USB. The PCB of the U421 is in a 24-pin "DIP-like" format.

USBmicro products shipped to Europe are produced without lead.

U451 USB Relay I⁄O Interface

The U451 provides a simple digital i⁄o interface for the PC (Win⁄Linux) or Mac (OSX) . Two relays, six transistor outputs, and eight i⁄o lines from the microcontroller are provided. Commands can be sent to the U451 that change the eight i⁄o lines from input to output. I⁄o lines can be individually selected as inputs or outputs. The U451 supports commands to read the ports, and if the ports are set to output, to write to the ports.

U401⁄U421⁄U451 USB I⁄O Interface

The U401⁄U421⁄U451 provides a simple digital i⁄o interface for the PC (Win⁄Linux) or Mac (OSX). Sixteen i⁄o lines from the microcontroller are provided. Commands can be sent to the U401⁄U421⁄U451 that change the i⁄o lines from input to output. I⁄O lines can be individually selected as inputs or outputs. The U401⁄U421⁄U451 supports commands to read the ports, and if the ports are set to output, to write to the ports.

The U401⁄U421⁄U451 is an interface to SPI devices. The firmware on the U401⁄U421⁄U451 provides generic access to read and write SPI devices. The SPI clock rate can be adjusted to 62.5 kHz, 500 kHz, 1 MHz, or 2 MHz. Because additional pins are available as generic i⁄o, the U401 can use these lines as slave select lines and address multiple SPI devices.

The SPI subsystem of the U401⁄U421⁄U451 can be used as a master to communicate with SPI devices such as EEPROMS and A⁄D converters. The U401⁄U421⁄U451 can also be used as a SPI slave to a microcontroller that uses the U401⁄U421⁄U451 as a gateway to the PC (Win⁄Linux) or Mac (OSX) . A PIC or an AVR, for example, can act as a SPI master to communicate data with the U401⁄U421⁄U451, which can then transfer the data to a PC (Win⁄Linux) or Mac (OSX) application.

The U401⁄U421 is a convenient way to interface a standard Hitachi-type of intelligent LCD controller to USB. The commands that support communication to the LCD module are the "standard" LCD commands. Standard commands include writing characters to the display, and controlling the display.

USB interfacing is simple with the U401⁄U421⁄U451 - There are no USB drivers to write and there is no device firmware to develop. There are sample applications that will get you started in minutes. The sample code is available to change for your application. 


Hardware:  U401 USB Interface    U421 USB Interface   U451 USB Interface

Programming:  USBm DLL Programming    Download Files

Application Notes:  U4x1 Application Notes    Misc Applications and Information    FAQ

While every effort has been made to make sure that the information posted on this site is correct, the author can not be held liable for any damages whatsoever for losses as a result of the application of this information. Use this information at your own risk.

USBmicro can design your custom and semi-custom USB product. Email about USB design can be directed to " Robert " at usbmicro.com.

Copyright © USBmicro, L.L.C., 2002-2010

Previous  |  Next ]     [ Up  |  First  |  Last ]     (Article 2 of 126)

This page is created with TreePad