MCUs feature full-speed USB 2.0 connectivity for embedded apps

December 2004
Portable Design;Dec2004, Vol. 10 Issue 12, p34
The article presents information on MCUs. Most of the USB-capable microcontrollers are optimized exclusively for applications in the PC peripherals and consumer markets. Four USB PIC microcontrollers bring the benefits of full-speed USB to a broader range of embedded applications that operate in harsh environments and only occasionally connect to PCs. Featuring 48-MHz operation and 12-Mbit/s data transfer rates, the flash PIC microcontrollers integrate USB as one of the primary serial interfaces, unlike the prevalent approach, which adds a serial-to-USB patch on top of a legacy design. The MCUs provide 24 or 32 kbytes of self-programmable enhanced flash memory, which allows field upgrades for end applications through the USB port. An area of major concern for most new USB-application designers is the quantity and quality of available firmware support. The manufacturer is introducing a set of libraries for the most common application classes, including the human interface device, communication device class and custom drivers.


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