A000023

A000023 Datasheet

A000022 without PoE

Part	Datasheet
A000023	A000023 (pdf)

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Arduino Leonardo ETH Page 1 of 10 Arduino Leonardo ETH Overview The Leonardo ETH is a microcontroller board based on the ATmega32U4 datasheet and the new W5500 TCP/IP Embedded Ethernet Controller datasheet has 20 digital input/output pins of which 7 can be used as PWM outputs and 12 as analog inputs , a 16 MHz crystal oscillator, a RJ45 Page 2 of 10 connection, a micro USB connector, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. The Leonardo ETH differs from the preceding Ethernet board in that the ATmega32u4 has built-in USB communication, eliminating the need for an external USB-to-serial converter. This allows the Leonardo ETH to appear to a connected computer as a mouse and keyboard, in addition to a virtual CDC serial / COM port. It also has other implications for the behaviour of the board. Plus, it has the new W5500 TCP/IP Embedded Ethernet Controller onboard. An optional Power over Ethernet module can be added to the board as well. The Leonardo ETH has the same Wiznet Ethernet interface as the Ethernet Shield An onboard microSD card reader, which can be used to store files for serving over the network, is accessible through the SD Library. Pin 10 is reserved for the Wiznet interface, SS for the SD card is on Pin The board uses the standardized pinout, consisting of: added SDA and SCL pins beside the AREF pin, two TWI pins have been added. This will allow to connect the Leonardo ETH to Shields that use the I2C or TWI bus communication for their functioning. the IOREF it allows the shields to adapt to the IO voltage level provided by the Board. The Shield that uses the IOREF pin will be compatible with both 3V3 and 5V e.g Due and Uno IO levels Arduino Boards. Next to the IOREF pin you can find another currently not in use pin, that is reserved for future usage. Microcontroller Operating Voltage ATmega32u4 5V Page 3 of 10 Input Voltage Plug recommended 7-12V Input Voltage Plug limits 6-20V Input Voltage PoE limits 36-57V Digital I/O Pins PWM Channels Arduino Pins reserved 4 used for SD card select 10 used for W5500 select Analog Input Pins DC Current per I/O Pin 40 mA DC Current for 3.3V Pin 1 A only when powered via the external power supply Flash Memory 32 KB ATmega32u4 of which 4 KB used by bootloader SRAM KB ATmega32u4 EEPROM 1 KB ATmega32u4 Clock Speed 16 MHz W5500 TCP/IP Embedded Ethernet Controller Power Over Ethernet ready Magnetic Jack Micro SD card, with active voltage translators Schematic & Reference Design Page 4 of 10 EAGLE files Schematic A rduino-Leonardo-ETH-XX-schematic.pdf Power

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Arduino Leonardo ETH

Page 1 of 10

Arduino Leonardo ETH

Overview

The Leonardo ETH is a microcontroller board based on the ATmega32U4 datasheet and the new W5500 TCP/IP Embedded Ethernet Controller datasheet has 20 digital input/output pins of which 7 can be used as PWM outputs and 12 as analog inputs , a 16 MHz crystal oscillator, a RJ45

Page 2 of 10
connection, a micro USB connector, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. The Leonardo ETH differs from the preceding Ethernet board in that the ATmega32u4 has built-in USB communication, eliminating the need for an external USB-to-serial converter. This allows the Leonardo ETH to appear to a connected computer as a mouse and keyboard, in addition to a virtual CDC serial / COM port. It also has other implications for the behaviour of the board. Plus, it has the new W5500 TCP/IP Embedded Ethernet Controller onboard. An optional Power over Ethernet module can be added to the board as well. The Leonardo ETH has the same Wiznet Ethernet interface as the Ethernet Shield An onboard microSD card reader, which can be used to store files for serving over the network, is accessible through the SD Library. Pin 10 is reserved for the Wiznet interface, SS for the SD card is on Pin The board uses the standardized pinout, consisting of:
added SDA and SCL pins beside the AREF pin, two TWI pins have been added. This will allow to connect the Leonardo ETH to Shields that use the I2C or TWI bus communication for their functioning.
the IOREF it allows the shields to adapt to the IO voltage level provided by the Board. The Shield that uses the IOREF pin will be compatible with both 3V3 and 5V e.g Due and Uno IO levels Arduino Boards. Next to the IOREF pin you can find another currently not in use pin, that is reserved for future usage.

Microcontroller Operating Voltage

ATmega32u4 5V

Page 3 of 10

Input Voltage Plug recommended
7-12V

Input Voltage Plug limits
6-20V

Input Voltage PoE limits
36-57V

Digital I/O Pins

PWM Channels

Arduino Pins reserved 4 used for SD card select
10 used for W5500 select

Analog Input Pins

DC Current per I/O Pin 40 mA

DC Current for 3.3V Pin
1 A only when powered via the external power supply

Flash Memory
32 KB ATmega32u4 of which 4 KB used by bootloader

SRAM

KB ATmega32u4

EEPROM
1 KB ATmega32u4

Clock Speed
16 MHz

W5500 TCP/IP Embedded Ethernet Controller

Power Over Ethernet ready Magnetic Jack

Micro SD card, with active voltage translators

Schematic & Reference Design

Page 4 of 10

EAGLE files Schematic A rduino-Leonardo-ETH-XX-schematic.pdf

Power

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Datasheet ID: A000023 518283