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AT90USB646 Datasheet(PDF) 247 Page - ATMEL Corporation

Part # AT90USB646
Description  8-bit Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
PDF  459 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90USB646 Datasheet(HTML) 247 Page - ATMEL Corporation

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247
7593H–AVR–11/08
ATmega32U6/AT90USB64/128
21.3
Typical Application Implementation
Depending on the USB operating mode (Device only, Reduced Host or OTG mode) and on the
target application power supply, the ATmega32U6/AT90USB64/128 require different hardware
typical implementations.
Figure 21-2. Operating modes versus frequency and power-supply
21.3.1
Device mode
21.3.1.1
Bus Powered device
Figure 21-3. Typical Bus powered application with 5V I/O
VCC (V)
VCC min
0
3.0
3.4
5.5
USB not operational
USB compliant,
without internal regulator
USB compliant,
with internal regulator
4.5
2.7
Max
Operating Frequency (MHz)
8 MHz
16 MHz
2 MHz
3.6
1µF
UDP
UDM
VBUS
UVSS
UID
UCAP
D-
D+
VBUS
UID
UGND
UVCC
AVCC
VCC
XTAL1
XTAL2
GND
GND
Rs=22
Rs=22



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