AVR16EB32 datasheet(22/46 Pages) MICROCHIP

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AVR16EB32 Curiosity Nano

Hardware Implementation

User Guide

DS50003605B - 22

Figure 4-2. Crystal Cut Straps

Y100

J111

J110

J109

J108

J107

C105

R100

C104

Info: The series resistor R100 may be required to limit the drive strength of the crystal. If no resistor

is required, the pads of R100 can be connected with a solder blob.

Important: PA0 and PA1 are used as the I2C pins on the edge connector.

Disconnecting PA0 and PA1 from the edge connector may disable some

functionality with connected base boards.

The crystal has a cut strap (J111), which can be used to measure the oscillator safety factor and is

done by cutting the strap and adding a 0402 SMD resistor across the strap. The AN2648 application

note from Microchip contains more information about oscillator allowance and safety factors.

Figure 4-2 shows the cut straps and solder points.

4.2

LED

One yellow user LED is available on the AVR16EB32 Curiosity Nano board. Either GPIO or PWM can

control it. Driving the connected I/O line to GND can also activate the LED.

Figure 4-3. AVR16EB32 Curiosity Nano LED0 Block Diagram

AVR16EB32 MCU

R104

PF5

Edge Connector

"PF5"

VCC

LED0

Debugger

Level Shi er

J105

"DBG1"

U205

DBG1

Table 4-2. LED Connection

AVR16EB32 Pin

Function

Shared Functionality

PF5

Yellow LED0

Edge connector, On-board debugger

4.3

Mechanical Switch

The AVR16EB32 Curiosity Nano board has one mechanical switch - a generic user-configurable

switch. Pressing it will connect the I/O pin to ground (GND).

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