Abstract: The MAX3420E USB controller allows designers to add USB peripheral functionality to any system. Because the MAX3420E provides an SPI interface to its register set rather than containing an onboard microprocessor, a set of MAX3420E C routines can be written to serve a wide variety of processors. This application note presents C code and explains all the functions to accomplish the basic USB operations. Basic USB transfers are explained to help understand the code. Download: Full Code Listing (including bug fix 1 and .h files) (ZIP, 11.6kb) The application note you have requested is available in Acrobat PDF format: APPLICATION NOTE 3690: USB Enumeration Code (and More) for the MAX3420E (PDF, 527kB) A free Acrobat PDF reader is available from: http://www.adobe.com/products/acrobat/readstep.html Related Parts   APP 3690: Nov 28, 2005 MAX3420E USB Peripheral Controller with SPI Interface Full Data Sheet (PDF, 372kB) Free Samples Automatic Updates Would you like to be automatically notified when new application notes are published in your areas of interest? Sign up for EE-Mail™. We Want Your Feedback!   Download, PDF Format (527kB)  AN3690, AN 3690, APP3690, Appnote3690, Appnote 3690