UUGear PiGear Nano User manual

Copyright © 2022 Dun Cat B.V. & THLAB, All rights reserved.
UUGear is a trade name of Dun Cat B.V.
PiGear Nano:
Nano-ITX Raspberry Pi Compute Module 4 Carrier Board
User Manual (revision 1.04)

Copyright © 2022 Dun Cat B.V. & THLAB, All rights reserved.
UUGear is a trade name of Dun Cat B.V.
Table of Contents
1. Product Overview ...............................................................................................................1
2. Specification / Technical Details..........................................................................................3
3. Package Content................................................................................................................4
4. Connect Raspberry Pi Compute Module 4 to the Board......................................................5
5. Installing Operating System................................................................................................7
5.1 For Raspberry Pi CM4 with eMMC...........................................................................7
5.2 For Raspberry Pi CM4 Lite (without eMMC).............................................................8
6. Powering PiGear Nano.......................................................................................................9
7. Software Installation / Update.............................................................................................9
8. Jumper Settings................................................................................................................11
9. Software Usage................................................................................................................14
9.1 Realtime Clock.......................................................................................................15
9.2 Analog Inputs (ADC)..............................................................................................16
9.3 Digital Inputs..........................................................................................................17
9.4 Digital Outputs .......................................................................................................18
9.5 Configurable Digital Inputs/Output..........................................................................19
9.6 Programmable LED Test........................................................................................19
9.7 Buzzer Test............................................................................................................19
9.8 UWI Usage ............................................................................................................20
10. 2x16 Quick Cable Connector.........................................................................................21
10.1 Serial Port..............................................................................................................22
10.2 Controller Area Network (CAN) Bus.......................................................................24
10.3 1-Wire Interface .....................................................................................................25
10.4 Analog Inputs (A/D Converter) ...............................................................................26
10.5 Digital Inputs..........................................................................................................30

Copyright © 2022 Dun Cat B.V. & THLAB, All rights reserved.
UUGear is a trade name of Dun Cat B.V.
10.6 Digital Outputs .......................................................................................................31
10.7 Configurable Digital Inputs/Outputs........................................................................32
11. PCIE .............................................................................................................................35
11.1 NVME SSD............................................................................................................36
11.2 4G LTE Module......................................................................................................36
11.3 USB3.0 ..................................................................................................................38
12. Realtime Clock (RTC) ...................................................................................................39
13. DSI and CSI..................................................................................................................40
14. SD Card Slot.................................................................................................................41
15. LED Indicators ..............................................................................................................41
16. Buzzer...........................................................................................................................41
17. Fan Connector ..............................................................................................................42
18. Power and Reset Button Connectors ............................................................................42
19. Case Kit for PiGear Nano..............................................................................................42
20. Revision History............................................................................................................43

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1. Product Overview
PiGear Nano is a high performance Nano-ITX (12x12cm) carrier board for Raspberry Pi Compute
Module 4. PiGear Nano is mainly designed for industrial applications, but you can also use it as office
computer, family media center, gaming console etc.
PiGear Nano offers a wide range of resources and interfaces. Please see below the diagram for
details:
There are also an NVME SSD M.2 connector and a SIM card slot underneath the board.
You can place PiGear Nano into a Nano-ITX computer case. Below is a mechanical drawing of the board.

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2. Specification / Technical Details
Network
Gigabit-Ethernet RJ45 socket x 1
MINI PCIE LTE/4G/GPRS interface x 1
On-board SIM card slot x 1
USB
USB 3.0 Type-A connector x 8
USB 2.0 Type-C connector x 1 (for flashing CM4, or powering the board with light load)
Analog & Digital I/O
18-bit ADC input x 4
Digital input x 4
Digital output x 4
Configurable digital I/O x 4
Signal Interface
RS232 x 2
RS485 x 2
CAN x 1
Wire interface x 1
Storage
NVME SSD M.2 interface x 1
Micro SD card slot x 1 (for Compute Module 4 Lite only)
Display
HDMI Type-A connector x 1
MIPI DSI interface x 1
Camera
MIPI CSI interface x 1
Other
Real-time clock x 1 (with supper capacitor for off-power time keeping)
Buzzer x 1
Power Indicator x 1
Programmable LED indicator x 1
5V fan interface (PH2.0 connector)
Power button x 1 (with extension connector)
Reset button x 1 (with extension connector)
Power Supply
DC 7V~30V (with reverse polarity protection)
or DC 5V (via USB Type-C connector)
Quiescent Current
~1mA

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Board Size and Weight
NANO-ITX 12 x 12 cm, 150g
Operating Environment
Temperature -30°C~80°C (-22°F~176°F)
Humidity 0~80%RH, no condensing
No corrosive gas
3. Package Content
Each package of PiGear Nano contains:
PiGear Nano board x 1
6x6x5 heat sink x 1 (for VL805 chip on the back of the board)
M3x8 metal standoff x 4
M3 screws x 4
M2 screws x 3
2.54-2P jumper cap x 5

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4. Connect Raspberry Pi Compute Module 4 to the Board
Before starting, it is recommended to install four metal standoffs underneath so the board can lay flat
on the desk. You can find four metal standoffs and four screws in the package. Just place the
standoff under the mounting hole and use a screw to secure it.
Connect Raspberry Pi Compute Module 4 to the board by simply aligning it with the two connectors
on board (or alternatively you can align the CE marks on CM4 and the board), and then give it a good
squeeze. It will crunch into place (and you can hear it).

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If you will use the device in a vibrating environment, you may want to secure your Raspberry Pi
Compute Module 4 on the board with four M2.5 screws (not included in the package).
It is also recommended to put the small heatsink (included in the package) on the VL805 chip on the
back of the board. Because this chip could get rather hot if the board is processing many USB data
translation.
You can peel off the paper on the heatsink and directly stick it on the chip VL805, as shown below:

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5. Installing Operating System
5.1 For Raspberry Pi CM4 with eMMC
If your Raspberry Pi Compute Module has eMMC, you can flash the OS into its eMMC. If you want,
you can have this done with the official I/O board. However using the official I/O board is not
necessary because you can get this done on PiGear Nano board directly.
Before proceeding, please make sure to short the "bypass power switch" jumper. This is to bypass
the e-latch power switch, so your PiGear Nano board will be powered even without the operating
system. The "bypass switch" jumper is on the left of Raspberry Pi CM4 (above the "Default On"
jumper), as shown in picture below:
You will also need to short the "Disable eMMC Boot" jumper, so the eMMC on your Raspberry Pi
CM4 will boot in USB mass storage mode, and you can flash the disk image into it.
Now connect a USB Type-C cable to PiGear Nano, and connect the other end of the cable to your
computer. This USB cable will power your PiGear Nano during the installation process, and there is
no need to connect any other power supply.