8-BIT MICROCONTROLLERS WITH
INTEGRATED USB CONTROLLER Everywhere You Are®
USB Everywhere
After con quering c omputers an d periph erals, USB is gaining momentum in c onsumer pro ducts and
industrial equipment. Data storage, dat a transfer and product confi guration are key a pplications driving
this move.
On-The-Go (OTG) now allows de vices to communicate witho ut PC intervention. With the suitable device
class libraries OTG can:
• support various targeted products
• negotiate host or device role with another OTG device
• connect to any PC as a USB device
Human Interface Devices form by far the most popular clas s of USB
peripherals. New pointing and input dev ices gain in accuracy with full-
speed (12 Mbit/s), which is provided by all Atmel USB microcontrollers.
Atmel U SB mi crocontrollers also support isochronous trans fers and double
buffering for audio streaming. L ast but not least, Atmel controlle rs with seven endpoints
can merge several USB functions in one composite device, thus sav ing space and components.
USB Self-Programming
Instant connecti on: programming o n demand
Atmel USB Flash microcontrollers’ on-chip bootloader can be used for self-programming at any step of the
product life cycle: development, production, af ter sales support and in day to day use by the end us er.
Dedicated on-chip ha rdware secures the user fi rmware but can also force the application to reprogram
when it has lost control.
Standard Flash MCU
USB to SPI
or
USB to RS232
adapter
USB Flash MCU
USB
12 Mbps