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AVR16EB32 데이터시트(PDF) 21 Page - Microchip Technology

부품명 AVR16EB32
상세설명  AVR16EB32 Curiosity Nano
PDF  46 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

AVR16EB32 데이터시트(HTML) 21 Page - Microchip Technology

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AVR16EB32 Curiosity Nano
Hardware Implementation
 User Guide
© 2024 Microchip Technology Inc. and its subsidiaries
DS50003605B - 21
4.
Hardware Implementation
LED, Mechanical Switch, Power Supply
4.1
Crystal
The AVR16EB32 Curiosity Nano Board has a 32.768 kHz crystal footprint made for standard 3.2 mm
by 1.5 mm surface mount crystals with two terminals. The crystal footprint is not connected to the
AVR16EB32 by default, as the GPIOs are routed to the edge connector.
Figure 4-1. 32.768 kHz Crystal Block Diagram
XTAL32K1
AVR16EB32
MCU
Edge Connector
"PA1"
"PA0"
U100
XTAL32K2
32.768 kHz
Crystall Footprint
PA1
PA0
J108
J107
J110
J111
Y100
J109
Table 4-1. Crystal Connections
AVR16EB32 Pin
Function
Shared Functionality
PA0
XTAL32K1
Edge connector
PA1
XTAL32K2
Edge connector
Some hardware modifications are required to use a crystal with the AVR16EB32.
• The two I/O lines routed to the edge connector must be disconnected to reduce the chance of
contention to the crystal and to remove excessive capacitance on the lines
• Disconnect the edge connector by cutting the two cut straps on the bottom side of the board,
J107 and J108. Marked PA0 and PA1 in the silkscreen
• Connect the crystal by soldering on a solder blob on each circular solder point next to the crystal
on the top side of the board, J109 and J110
• Add suitable capacitors to C104 and C105
• Add a suitable series resistor to R100



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