8-BIT MICROCONTROLLERS WITH
INTEGRATED USB CONTROLLER
Everywhere You Are
®
USB Everywhere
After conquering computers and peripherals, USB is gaining momentum in consumer products and
industrial equipment. Data storage, data transfer and product confi guration are key applications driving
this move.
On-The-Go (OTG) now allows devices to communicate without 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 class of USB
peripherals. New pointing and input devices gain in accuracy with full-
speed (12 Mbit/s), which is provided by all Atmel USB microcontrollers.
Atmel USB microcontrollers also support isochronous transfers and double
buffering for audio streaming. Last but not least, Atmel controllers with seven endpoints
can merge several USB functions in one composite device, thus saving space and components.
USB Self-Programming
Instant connection: programming on demand
Atmel USB Flash microcontrollers’ on-chip bootloader can be used for self-programming at any step of the
product life cycle: development, production, after sales support and in day to day use by the end user.
Dedicated on-chip hardware 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
