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Digital I/O pins 0-7, like already mentioned analog pins, are not used by the shield and are provided only for convenience.

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Max_LCD library which is part of the standard USB Host library software package uses some the GPOUT pins. They can be used for many purposes I use them to drive HD44780-compatible character LCD, as can be seen in the digital camera controller circuit, as well as this keyboard example.

GPOUT pins are eight 3.3V general-purpose digital output pins of MAX3421E.

SCK, MOSI, MISO and RESET signals from this connector are used.

ICSP connector is used by the shield to send/receive data using the SPI interface.

An example of GPIN use can be seen in the digital camera controller project. GPIN pins can also be programmed as a source of MAX3421E interrupt. They are used primarily to interface with buttons, rotary encoders, and such. Eight 3.3V general-purpose digital input pins of MAX3421E. They are provided to simplify mounting and provide pass-through for shields mounted atop of USB Host Shield in a stack.

Analog pins are not used by the shield.

RESET, 3.3V, 5V and GROUND signals from this connector are used.

Power pins are used to connect to the power pins of the Arduino board.

See the Power Options section for a detailed explanation. The configuration is shown, when both jumpers are closed, and is suitable for official Arduinos, such as UNO, Duemilanove, Mega and Mega 2560. They are used for different power configurations.

Power Select 2 solder jumpers marked “5V” and “3.3V”.

I start my explanation with an arrow close to the Reset button and move counter-clockwise.

There are also a number of solder pads and jumpers, which are marked with red arrows. The board contains a Maxim MAX3421E USB host controller, 12MHz crystal, level shifters, resistors, capacitors, a Reset button, and USB A-type connector. The layout of the Standard board is depicted on the right. Full-size shield USB Host Shield 2.0 exists in 2 configurations – “Standard” and “3.3V”. Generally, modification and troubleshooting of the Mini shield board are more difficult. Small size, dense part placement, and lack of silkscreen markings make this board more suitable for advanced projects, as well as semi-permanent and permanent installations when basic functionality and wiring are already confirmed on the larger prototype. It can be mated with other Arduino and non-Arduino MCU boards, but it takes more work.

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Ideally, it should be used together with an Arduino Pro Mini 3.3V board.

Mini shield main advantages are low size, weight, and cost.

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Full size shield is designed to fit on top of “Standard” Arduinos, such as Uno, Duemilanove, Mega 1280/2560, and compatible clones.Ī full-size shield has been designed for ease of use it has plenty of empty space, features extra pads, solder jumpers, and extensive silkscreen markings, simplifying board modification and troubleshooting.įull size shield is recommended for basic prototyping and simple projects. USB Host shields are available in two form factors – full size and Mini. Related Article: USB Powered Monitor USB Host Shield Hardware Board Layout Older revisions of the shield will be described later. At the time of writing, the current revision of the full-size USB Host Shield is 2.0 and the current Mini shield is 1.1. This document covers both full-size and Mini shield variants. I start by explaining the board’s connectors, pads, and jumpers, as well as differences between shield variants.įinally, I demonstrate ways to adapt USB Host Shield to non-typical Arduino boards and less-common power configurations.

ARDUINO MEGA 2560 ICSP PINS MANUAL

On this page, I’m giving a detailed description of the USB Host Shield Hardware manual guide.

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In the USB Shield section of this site, you can find many articles describing projects and code examples written for this shield. The shield provides a USB Host interface, allowing full and low-speed communication with USB devices – keyboards, mice, joysticks, MIDI, digital cameras, Bluetooth, and many others. USB Host Shield is an inexpensive ( $25 for the full-sized board and $20 for the Mini variant ), add-on board, for the Arduino development platform.

Arduino mega 2560 icsp pins