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SAM4E Datasheet(PDF) 18 Page - ATMEL Corporation

Part # SAM4E
Description  SAM4E Microcontrollers
PDF  40 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

SAM4E Datasheet(HTML) 18 Page - ATMEL Corporation

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SAM4E-EK Evaluation Kit [USER GUIDE]
Atmel-42067C-SAM4E-EK_UserGuide_022016
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8
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4.3.15 USB Device
The SAM4E16 UDP port is compliant with the Universal Serial Bus (USB) rev 2.0 Full Speed device
specification. J34 is a micro B-type receptacle for USB device.
Both 27Ω resistors R96 and R97 build up 90Ω differential impedance together with the (embedded) 6Ω
output impedance of the SAM4E16 full speed channel drivers.
R93 and R94 build up a divider bridge from VBUS +5V to implement plug-in detection (5V level gets
lowered to a PIO compatible 3.3V level) through PC21.
Figure 4-15.
USB
4.3.16 Analog Interface
4.3.16.1
Analog Reference
The 3.0V voltage reference is based on a LM4040 (Precision Micropower Shunt Voltage Reference).
This ADVREF level can be set as 3.0V or 3.3V via the jumper J2.
Figure 4-16.
Analog VREF



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