Re: Adding USB Interface to Low-Cost 8-Bit Microcontroller

"Don McKenzie" <5V@xxxx> wrote in message
news:6b6o81F3aou36U1@xxxxxxxxxxxxxxxxxxxxx
David T. Ashley wrote:
Hi,

I work for a company that produces low-cost consumer electronics that use
8-bit microcontrollers. These have the standard 8-bit whistles, like
SPI, SCI, etc.

We've kicked around the idea of allowing customers to re-FLASH our
products. The re-FLASHing would be facilitated by code we write that runs
in the microcontroller and reprograms a portion of the FLASH.

We have a handle on digital signatures and what would be required to
prevent a customer from "forging" a software load.

However, what is required to implement a USB interface in the product
(for an 8-bit microcontroller), and what is required as far as a driver
on the PC side? The goal would be that we distribute a re-FLASHing
application to the customer that runs on the PC. They would run this
application with a USB cable connected from the PC to our product.

What all is required (hardware, driver development kits, etc.)?

Thanks for all.

An off the shelf solution:
http://www.dontronics-shop.com/4d-micro-usb-ce5.html
uses FTDI chip and drivers.

have many other solutions at:
http://www.dontronics-shop.com/usb-module-add-ons.html
which may be worth looking at.

Cheers Don...


--
Don McKenzie

Site Map: http://www.dontronics.com/sitemap
E-Mail Contact Page: http://www.dontronics.com/email

Intelligent 2.83" AMOLED with touch screen for micros:
http://www.dontronics-shop.com/product.php?productid=16699


Having used the FTDI devices, may I respectfully suggest the MAXIM parts?
MAX3420 for USB peripheral only, or MAX3421 for host and peripheral modes.


.

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