AT90USB1286-16MU ATMEL [ATMEL Corporation], AT90USB1286-16MU Datasheet - Page 251

• Manufacturer Part Number: AT90USB1286-16MU
• Description: Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
• Manufacturer: ATMEL [ATMEL Corporation]

21.4
21.4.1
7593A–AVR–02/06
General Operating Modes
Introduction
After a hardware reset, the USB controller is disabled. When enabled, the USB controller has to
run the Device Controller or the Host Controller. This is performed using the ID detection.
• If the ID pin is not connected to ground, the ID bit is set by hardware (internal pull up on the
UID pad) and the USB Device controller is selected.
VBUS
UVSS
VBUS
UVSS
UDM
UDP
UDM
UID
UDP
UID
5V
1µF
UCAP
VBUS
UVSS
D+
D-
UID
1µF
UVCC
XTAL1
XTAL2
AVCC
UVCON
UCAP
VBUS
UVSS
D+
D-
UID
AVSS
UVCC
XTAL1
DVCC
DVSS
XTAL2
AVCC
External 3.0V - 3.4V
Power Supply
AVSS
AT90USB64/128
DVCC
DVSS
External 5.0V
Power Supply
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