A000022

A000022 Datasheet

Code A000022

Part	Datasheet
A000022	A000022 (pdf)

PDF Datasheet Preview
ARDUINO LEONARDO ETH Code A000022 All the fun of a Leonardo, plus an Ethernet port to extend your project to the IoT world. You can control sensors and actuators via the internet as a client or server. The Leonardo ETH is a microcontroller board based on the ATmega32U4 datasheet and the new W5500 TCP/IP Embedded Ethernet Controller datasheet . It 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 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 adapter or battery to get started. The Leonardo ETH differs from the preceding Ethernet board in that the ATmega32u4 has USB communication, eliminating the need for an external 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 • 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. Getting Started You can find in the Getting Started section all the information you need to configure your board, use the Arduino Software IDE , and start tinker with coding and electronics.. • Arduino Microprocessor Processor 10/100 Mbit/s • Arduino Microcontroller Microcontroller Architecture Operating Voltage Flash memory SRAM Clock Speed Analog I/O Pins EEPROM DC Current per I/O Pins ATmega32u4 AVR 5V 32 KB of which 4 KB used by bootloader 2.5Kb 16 MHz 12 1 KB 40 mA on I/O Pins 1A on V Pin only when powered via external power supply • General Input Voltage Digital I/O Pins Reserved Pins Digital I/O Pins PWM Output Power Consumption PCB Size Card Reader Weight Product Code V 4 used for SD card select 10 used for W5500 select 20 7 82 mA x mm Micro SD card, with active voltage translators 28g A000108 OSH Schematics EAGLE FILES IN .ZIP SCHEMATICS IN .PDF Power The board can be powered also via an external power supply, via an optional Power over Ethernet PoE module, or using the micro USB connection. External power can come either from an adapter or battery. When using the power adapter, it can be connected by plugging a 2.1mm positive plug into the board's power jack. Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector. The board can operate on an external supply of 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is from 7 to 12 volts. The power pins are as follows: • VIN. The input voltage to the Arduino board when it's using an external power source as opposed to 5 volts from the USB connection or other regulated power source . You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin. • 5V. This pin outputs a regulated 5V from the regulator on the board. The board can be supplied with power either from the DC power jack 7 12V , the USB connector 5V , or the VIN pin of the board Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. We don't advise it. • 3V3. A volt supply generated by the regulator. Maximum current draw is 50 mA. • GND. Ground pins. • IOREF. This pin on the Arduino board provides the voltage reference with which the microcontroller operates. A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs for working with the 5V or 3.3V. The optional PoE module is designed to extract power from a conventional twisted pair Category 5 Ethernet cable. PoE module features are as follows IEEE802.3af compliant Input voltage range 36V to 57V Overload and protection 12V Output High efficiency DC/DC converter typ 85% 80% load 1500V isolation input to output Memory The ATmega32u4 has 32 KB with 4 KB used for the bootloader . It also has KB of SRAM and 1 KB of EEPROM which can be read and written with the EEPROM library . Input and Output Each of the 14 digital pins on the Leonardo ETH board can be used as input or output, using the pinMode , digitalWrite , and digitalRead functions. They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal resistor disconnected by default of kOhms. In addition, some pins have specialized functions: • Serial 0 RX and 1 TX used to receive RX and transmit TX TTL serial data using the ATmega32U4 hardware serial capability. Note that on the Leonardo ETH, the Serial class refers to USB CDC communication for TTL serial on pins 0 and 1, use the Serial1 class. • TWI 2 SDA and 3 SCL they support TWI communication using the Wire library. • External Interrupts 3 interrupt 0 , 2 interrupt 1 , 0 interrupt 2 , 1 interrupt 3 and 7 interrupt These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value. See the attachInterrupt function for details. • PWM 3, 5, 6, 9, 10, 11 and Provide PWM output with the analogWrite function. • SPI on the ICSP header. These pins support SPI communication using the SPI library. Note that the SPI pins are not connected to any of the digital I/O pins as they are on the Uno, They are only available on the ICSP connector. This means that if you have a shield that uses SPI, but does NOT have a ICSP connector that connects to the Leonardo's ICSP header, the shield will not work. • LED There is a LED connected to the digital pin When the pin is HIGH value, the LED is on, when the pin is LOW, it's off. • Analog Inputs A6 A11 on digital pins 4, 6, 8, 9, 10, and The Leonardo has 12 analog inputs, labeled A0 through A11, all of which can also be used as digital i/o. Pins appear in the same locations as on the Uno inputs are on digital i/o pins 4, 6, 8, 9, 10, and 12 respectively. Each analog input provides 10 bits of resolution i.e. 1024 different values . By default, the analog inputs measure from ground to 5 volts, though it is possible to change the upper end of their range using the AREF pin and the analogReference function.

PDF Datasheet Preview

ARDUINO LEONARDO ETH

Code A000022

All the fun of a Leonardo, plus an Ethernet port to extend your project to the IoT world. You can control sensors and actuators via the internet as a client or server.

The Leonardo ETH is a microcontroller board based on the ATmega32U4 datasheet and the new W5500 TCP/IP Embedded Ethernet Controller datasheet . It 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 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 adapter or battery to get started.

The Leonardo ETH differs from the preceding Ethernet board in that the ATmega32u4 has USB communication, eliminating the need for an external 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
• 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.

Getting Started

You can find in the Getting Started section all the information you need to configure your board, use the Arduino Software IDE , and start tinker with coding and electronics..
• Arduino Microprocessor

Processor
10/100 Mbit/s
• Arduino Microcontroller

Microcontroller Architecture Operating Voltage Flash memory SRAM Clock Speed Analog I/O Pins EEPROM DC Current per I/O Pins

ATmega32u4 AVR 5V 32 KB of which 4 KB used by bootloader 2.5Kb 16 MHz 12 1 KB 40 mA on I/O Pins 1A on V Pin only when powered via external power supply
• General

Input Voltage Digital I/O Pins Reserved Pins Digital I/O Pins PWM Output Power Consumption PCB Size Card Reader Weight Product Code

V 4 used for SD card select 10 used for W5500 select 20 7 82 mA x mm Micro SD card, with active voltage translators 28g A000108

OSH Schematics

EAGLE FILES IN .ZIP SCHEMATICS IN .PDF

Power

The board can be powered also via an external power supply, via an optional Power over Ethernet PoE module, or using the micro USB connection. External power can come either from an adapter or battery. When using the power adapter, it can be connected by plugging a 2.1mm positive plug into the board's power jack. Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector. The board can operate on an external supply of 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is from 7 to 12 volts. The power pins are as follows:
• VIN. The input voltage to the Arduino board when it's using an external power source as opposed to 5 volts from the USB connection or other regulated power source . You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.
• 5V. This pin outputs a regulated 5V from the regulator on the board. The board can be supplied with power either from the DC power jack 7 12V , the USB connector 5V , or
the VIN pin of the board Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. We don't advise it.
• 3V3. A volt supply generated by the regulator. Maximum current draw is 50 mA.
• GND. Ground pins.
• IOREF. This pin on the Arduino board provides the voltage reference with which the microcontroller operates. A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs for working with the 5V or 3.3V.

The optional PoE module is designed to extract power from a conventional twisted pair Category 5 Ethernet cable. PoE module features are as follows IEEE802.3af compliant Input voltage range 36V to 57V Overload and protection 12V Output High efficiency DC/DC converter typ 85% 80% load 1500V isolation input to output

Memory

The ATmega32u4 has 32 KB with 4 KB used for the bootloader . It also has KB of SRAM and 1 KB of EEPROM which can be read and written with the EEPROM library .

Input and Output

Each of the 14 digital pins on the Leonardo ETH board can be used as input or output, using the pinMode , digitalWrite , and digitalRead functions. They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal resistor disconnected by default of kOhms. In addition, some pins have specialized functions:
• Serial 0 RX and 1 TX used to receive RX and transmit TX TTL serial data using the ATmega32U4 hardware serial capability. Note that on the Leonardo ETH, the Serial class refers to USB CDC communication for TTL serial on pins 0 and 1, use the Serial1 class.
• TWI 2 SDA and 3 SCL they support TWI communication using the Wire library.
• External Interrupts 3 interrupt 0 , 2 interrupt 1 , 0 interrupt 2 , 1 interrupt 3 and 7 interrupt These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value. See the attachInterrupt function for details.
• PWM 3, 5, 6, 9, 10, 11 and Provide PWM output with the analogWrite function.
• SPI on the ICSP header. These pins support SPI communication using the SPI library. Note that the SPI pins are not connected to any of the digital I/O pins as they are on the Uno, They are only available on the ICSP connector. This means that if you have a shield that uses SPI, but does NOT have a ICSP connector that connects to the Leonardo's ICSP header, the shield will not work.
• LED There is a LED connected to the digital pin When the pin is HIGH value, the LED is on, when the pin is LOW, it's off.
• Analog Inputs A6 A11 on digital pins 4, 6, 8, 9, 10, and The Leonardo has 12 analog inputs, labeled A0 through A11, all of which can also be used as digital i/o. Pins appear in the same locations as on the Uno inputs are on digital i/o pins 4, 6, 8, 9, 10, and 12 respectively. Each analog input provides 10 bits of resolution i.e. 1024 different values . By default, the analog inputs measure from ground to 5 volts, though it is possible to change the upper end of their range using the AREF pin and the analogReference function.

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Datasheet ID: A000022 515358