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ATmega32U2 Datasheet(PDF) 187 Page - ATMEL Corporation

Part # ATmega32U2
Description  8-bit Microcontroller with 8/16/32K Bytes of ISP Flash and USB Controller
PDF  314 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega32U2 Datasheet(HTML) 187 Page - ATMEL Corporation

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187
7799B–AVR–07/09
ATmega8U2/16U2/32U2
Figure 20-4. Typical Bus powered application with 3V I/O
20.3.2
Self Powered device
Figure 20-5. Typical Self powered application with 4.0V to 5.5V I/O(1)
Note:
1. The internal 3.3V regulator is bypassed. Disable the regulator to avoid additional power con-
sumption. See the “REGCR – Regulator Control Register” on page 196 for details.
1µF
UDM
UDP
VBUS
UVSS
UCAP
D-
D+
UVCC
VCC
UVSS
VSS
XTAL1
XTAL2
1µF
External 3.4V - 5.5V
Power Supply
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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