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Summary of Contents for UUGear BIG7
- Page 1 BIG7 USB Hub (Rev 2) for Raspberry Pi User Manual Copyright © 2018 UUGear s.r.o. All rights reserved.
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Page 2: Table Of Contents
Raspberry Pi Compute Module (with Development Kit) ......19 Raspberry Pi Zero ..................21 Monitoring USB Port Usage ................23 Controlling the Power for USB Ports ..............24 Integrates with Witty Pi 2 .................. 26 Integrates with Zero2Go ................... 30 Copyright © 2018 UUGear s.r.o. All rights reserved. -
Page 3: Product Overview
Product Overview This is a 7-Port USB hub designed for Raspberry Pi. It extends one USB port on Raspberry Pi to 7 usable USB ports, which allows you to connect much more USB devices to your Raspberry Pi. This USB hub is compatible with all versions of Raspberry Pi, including the old A/B model, A+/B+ model, compute module (with development kit), Raspberry Pi 2/3 (B model) and Raspberry Pi Zero. - Page 4 Raspberry Pi B+ and Raspberry Pi 2/3 (B model) have 4 USB ports on board, which are usually enough for your project. However, sometimes you may need more USB ports. Below are some USB devices you may want to connect to your Raspberry Pi: Keyboard Mouse Wi-Fi Dongle...
- Page 5 The figure below shows how the USB hub looks like: 1~7) Downstream USB port with green (or yellow) LED as activity indicator Upstream USB port Power link jumper Micro-USB DC 5V power in Red LED as power indicator Alternative DC 5V power in Pogo pin holder (+5V) Pogo pin holder (GND) Unpopulated 5x2 header for port state indication...
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Page 6: Package Content
Package Content Each package of this USB hub contains: 7-port USB hub board x 1 Cupped head pogo pin x 4 M2.5 x 10+6mm Copper Standoff x 4 M2.5 screws x 4 M2.5 nuts x 4... -
Page 7: Specifications
Specifications 85mm x 56mm x 10mm Dimension: Weight 28g (net weight without any accessory) USB Specification Revision 2.0 and 1.1 compatibility Standards Multiple Transaction Translator (MTT) USB v1.1: up to 12 Mbps Data Speed USB v2.0: up to 480 Mbps Upstream: 1 (mini-USB) USB Ports Downstream: 7 (A-type USB) -
Page 8: About Back-Power (Back Feeding Power)
About Back-Power (Back Feeding Power) Back-power (or back feeding power) here means the USB hub provides electronic power to Raspberry Pi. This can only (optionally) happen when the USB hub gets power supply connected (works in self-power mode). The advantage of back-power is that you only need one power supply to power both the USB hub and Raspberry Pi. -
Page 9: Self-Power Mode
Self-Power Mode If you connect the power supply to the micro USB port (power in) on the USB hub, the USB hub will work in self-power mode, or say it becomes a powered USB hub. In this case the maximum output current for all USB ports are 2,600mA. If the USB hub is also back-powering your Raspberry Pi, the current consumed by Raspberry Pi is also taken into account. -
Page 10: Usage Guide
Usage Guide This USB hub can work with all models of Raspberry Pi. However, the mounting and wiring may be different for various models. Please read the sections below for details. Raspberry Pi Model A and B The old models of Raspberry Pi (A and B model) only have two mounting holes, so we only need two sets of copper standoff, screw and nut to mount the USB hub under it. - Page 11 power both the USB hub and your Raspberry Pi. If you don’t want the back-powering, you can disable it by putting the jumper on another side. By doing so, you will need two power supplies, one for the USB hub and the other one for your Raspberry Pi.
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Page 13: Raspberry Pi B+, Raspberry Pi 2 And Raspberry Pi 3 (B Model)
Raspberry Pi B+, Raspberry Pi 2 and Raspberry Pi 3 (B Model) Raspberry Pi B+ and Raspberry Pi 2/3 (B model) have four mounting holes on board, so we can use the four sets of copper standoff, screw and nut to mount the USB hub under it. - Page 14 There are 4 pogo pin holders on the USB hub board. Gently put the pogo pin into the holder and press it to the bottom. You can use the other end of the tweezers.
- Page 15 The cupped head of the pogo pin should be on top. When you mount the USB hub under Raspberry Pi. The cupped head will contact to the +5V and GND pins in the 40-pin header. Also the cupped head will contact to the D+ and D- at the bottom of a USB port on Raspberry Pi.
- Page 16 3. Align the GND pogo pin to the most left-bottom pin (GND) in 40-pin header. 4. Align the +5V pogo pin to the most right-top pin (+5V) in 40-pin header. 5. Use screws to fix the USB hub under Raspberry Pi. Remarks: don’t let the pogo pin touches any other pin in the header, or it might damage your Raspberry Pi!
- Page 17 In the figure above you can see the actual position of the D+ and D- joint points. After mounting the USB hub under Raspberry Pi, one USB port on Raspberry Pi is taken by the USB hub (as upstream port) and it could not be used by other USB devices. Thanks to the 4 pogo pins, now your Raspberry Pi has 10 usable USB ports without connecting any USB cable! If you don’t want to use the back-powering, just take out the pogo pins from their...
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Page 19: Raspberry Pi A
Raspberry Pi A+ Raspberry Pi A+ has the same mounting holes with B+ model, so the process to mount the USB hub under it will be quite similar. The A+ model has its only USB port on different position, so we could not make the USB data connection with pogo pins, and a USB cable will be necessary to finish the connection. -
Page 21: Raspberry Pi Compute Module (With Development Kit)
Raspberry Pi Compute Module (with Development Kit) The Raspberry Pi compute module is supposed to be inserted into another product and it doesn’t have any USB port on its board. However if you are developing a product that uses Raspberry Pi compute module, you should also have a development kit, which allows you to plug the compute module on a development board and access the USB port on it. - Page 22 If you don’t want the back-powering, just put the jumper to the other side and connect two power supplies to USB hub and the development board accordingly.
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Page 23: Raspberry Pi Zero
Raspberry Pi Zero Raspberry Pi Zero has 4 mounting holes, but only two of them could be used to mount the USB hub under it. Raspberry Pi Zero supports back-powering via the data USB port, so you can just put the jumper to “Power Link”... -
Page 25: Monitoring Usb Port Usage
Monitoring USB Port Usage There is a footprint for 5x2 header (P4) on the USB hub board. This header is not populated and it is reserved for users who wants to monitor the USB port usage remotely. The figure below shows the naming of each pin within this header: LED5 LED6 LED7... -
Page 26: Controlling The Power For Usb Ports
Controlling the Power for USB Ports Since revision 2, BIG7 USB hub has a new footprint for 2-pin header (P7) on the top-right corner of the board. This header is not populated and it is reserved for users who wants to control the power for USB port with software or external switch. - Page 27 |__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=smsc95xx, 480M |__ Port 3: Dev 4, If 0, Class=Hub, Driver=hub/7p, 480M The result above shows that BIG7 USB hub is device 4 and it is connected to port 3 in USB bus 01. You may see different result though.
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Page 28: Integrates With Witty Pi 2
Integrates with Witty Pi 2 Witty Pi 2 is another UUGear product, which is a small extension board that can add realtime clock and power management to Raspberry Pi. It can be mounted above Raspberry Pi by connecting to the 40-pin GPIO header. - Page 29 The integration is quite simple, just mount Witty Pi 2 over Raspberry Pi and mount the USB hub under Raspberry Pi, you can do either part first. The Witty Pi comes with 4 female-female standoffs, while the USB hub comes with 4 female-male standoffs, thus they could be connected together and has Raspberry Pi board in the middle.
- Page 30 to use the USB cable. Raspberry Pi A+ doesn’t need to use the pogo pins for back-powering Raspberry Pi, but the situation changes when integrating with Witty Pi. The pogo pins will also be used to make sure the USB hub can work in self-power mode, otherwise the USB hub can only pull power via the upstream USB port, which can only provided very limited current.
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Page 32: Integrates With Zero2Go
Zero2Go is another UUGear product, which accepts 5~26V DC input and output 5V to power your Raspberry Pi. It can be mounted above Raspberry Pi by connecting to the 40-pin GPIO header. Similar with Witty Pi 2, Zero2Go has no conflict with BIG7 USB hub, and can be easily integrated together.
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