iWave iW-RainboW-G40S Installation manual

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i.MX 8M Plus Pico ITX SBC Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
iW-RainboW-G40S
i.MX 8M Plus
Pico ITX Single Board Computer
Hardware User Guide

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i.MX 8M Plus Pico ITX SBC Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
Document Revision History
Document Number
iW-PRGJJ-UM-01-R1.0-REL0.2-Hardware
Revision
Date
Description
0.1
15th July 2022
Initial Release
0.2
23rd May 2023
Updated Release
PROPRIETARY NOTICE: This document contains proprietary material for the sole use of the intended recipient(s). Do not
read this document if you are not the intended recipient. Any review, use, distribution or disclosure by others is strictly
prohibited. If you are not the intended recipient (or authorized to receive for the recipient), you are hereby notified that
any disclosure, copying distribution or use of any of the information contained within this document is STRICTLY
PROHIBITED. Thank you. “iWave Systems Tech. Pvt. Ltd.”

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iWave Systems Technologies Pvt. Ltd.
Disclaimer
iWave Systems reserves the right to change details in this publication including but not limited to any Product
specification without notice.
No warranty of accuracy is given concerning the contents of the information contained in this publication. To the
extent permitted by law no liability (including liability to any person by reason of negligence) will be accepted by iWave
Systems, its subsidiaries or employees for any direct or indirect loss or damage caused by omissions from or
inaccuracies in this document.
CPU and other major components used in this product may have several silicon errata associated with it. Under no
circumstances, iWave Systems shall be liable for the silicon errata and associated issues.
Trademarks
All registered trademarks, product names mentioned in this publication are the property of their respective owners
and used for identification purposes only.
Certification
iWave Systems Technologies Pvt. Ltd. is an ISO 9001:2015 Certified Company.
Warranty & RMA
Warranty support for Hardware: 1 Year from iWave or iWave's EMS partner.
For warranty terms, go through the below web link,
http://www.iwavesystems.com/support/warranty.html
For Return Merchandise Authorization (RMA), go through the below web link,
http://www.iwavesystems.com/support/rma.html
Technical Support
iWave Systems technical support team is committed to provide the best possible support for our customers so that
our Hardware and Software can be easily migrated and used.
For assistance, contact our Technical Support team at,
Email : [e-mail]
Website : www.iwavesystems.com
Address : iWave Systems Technologies Pvt. Ltd.
# 7/B, 29th Main, BTM Layout 2nd Stage,
Bangalore, Karnataka,
India –560076

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iWave Systems Technologies Pvt. Ltd.
Table of Contents
1. INTRODUCTION ..................................................................................................................................................8
1.1 Purpose.......................................................................................................................................................8
1.2 Pico ITX SBC Overview .................................................................................................................................8
1.3 List of Acronyms ..........................................................................................................................................8
1.4 Terminology Description............................................................................................................................10
1.5 References.................................................................................................................................................10
1.6 Important Note..........................................................................................................................................11
2. ARCHITECTURE AND DESIGN ............................................................................................................................12
2.1 i.MX 8M Plus Pico ITX SBC Block Diagram...................................................................................................12
2.2 i.MX 8M Plus Pico ITX SBC Features ...........................................................................................................13
2.3 i.MX 8M Plus SoC.......................................................................................................................................15
2.4 PMIC..........................................................................................................................................................16
2.5 Memory.....................................................................................................................................................17
2.5.1 LPDDR4 RAM .........................................................................................................................................17
2.5.2 eMMC Flash...........................................................................................................................................17
2.5.3 Micro SD Connector ...............................................................................................................................17
2.6 Boot Media Setting....................................................................................................................................18
2.7 Network & Communication .......................................................................................................................19
2.7.1 Wi-Fi and Bluetooth Interface ................................................................................................................19
2.7.2 Gigabit Ethernet Interface......................................................................................................................20
2.7.3 USB3.0 Interface ....................................................................................................................................21
2.7.4 USB3.0 Host Port....................................................................................................................................22
2.7.5 USB2.0 OTG Interface ............................................................................................................................23
2.7.6 GNSS Module.........................................................................................................................................24
2.7.7 CAN Interface.........................................................................................................................................24
2.8 Serial Interface Features............................................................................................................................26
2.8.1 Debug UART Interface............................................................................................................................26
2.8.2 RS232 Data UART Interface....................................................................................................................26
2.9 Audio/Video Features................................................................................................................................28
2.9.1 MIPI CSI Connector.................................................................................................................................28
2.9.2 I2S Audio Interface.................................................................................................................................32
2.9.3 HDMI Interface ......................................................................................................................................33
2.9.4 LVDS Interface .......................................................................................................................................34
2.9.5 USB Touch Connector.............................................................................................................................36
2.9.6 4-lane MIPI DSI Display Connector..........................................................................................................37
2.9.7 2-Lane MIPI DSI Display Connector (Optional) ........................................................................................39
2.12 M.2 Key B Connector .................................................................................................................................41
2.13 Expansion Connector.................................................................................................................................46
2.14 Other Features ..........................................................................................................................................49
2.14.1 Fan Header ............................................................................................................................................49
2.14.2 RTC Controller with RTC Battery Header.................................................................................................49

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2.14.3 JTAG Interface........................................................................................................................................50
2.14.4 Power ON/OFF Switch............................................................................................................................52
2.14.5 Reset Switch ..........................................................................................................................................52
2.14.6 CPU ON/OFF Switch ...............................................................................................................................53
2.15 i.MX 8M Plus Pin Multiplexing on Expansion Connector.............................................................................54
3. TECHNICAL SPECIFICATION...............................................................................................................................57
3.1 Electrical Characteristics............................................................................................................................57
3.1.1 Power Input Requirement ......................................................................................................................57
3.2 Power Consumption ..................................................................................................................................58
3.3 EnvironmentalCharacteristics ....................................................................................................................59
3.3.1 Environmental Specification...................................................................................................................59
3.3.1 Heat Sink ...............................................................................................................................................59
3.3.2 RoHS Compliance...................................................................................................................................60
3.3.3 Electrostatic Discharge...........................................................................................................................60
3.4 MechanicalCharacteristics .........................................................................................................................61
3.4.1 i.MX 8M Plus Pico ITX SBC Mechanical Dimensions.................................................................................61
4. ORDERING INFORMATION................................................................................................................................63

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List of Figures
Figure 1: i.MX 8M Plus Pico ITX SBC Block Diagram ...................................................................................................12
Figure 2: i.MX 8M Plus Block Diagram .......................................................................................................................15
Figure 3: Micro SD Card Connector ...........................................................................................................................17
Figure 4: Boot Media Switch .....................................................................................................................................18
Figure 5: Wi-Fi and Bluetooth Antenna Connector ....................................................................................................20
Figure 6: Dual RJ45 Magjack......................................................................................................................................21
Figure7 USB 3.0 TOP And Type C ...............................................................................................................................22
Figure 8: USB3.0 Host Port........................................................................................................................................23
Figure 9: USB OTG Connector....................................................................................................................................23
Figure 10: GNSS Antenna Connector .........................................................................................................................24
Figure 11: CAN Header..............................................................................................................................................25
Figure 12: Debug UART Header.................................................................................................................................26
Figure 13: RS232 Header...........................................................................................................................................27
Figure 14: 36 pin MIPI CSI Connector ........................................................................................................................28
Figure 15: Audio IN/OUT Jack....................................................................................................................................32
Figure 16: Speaker Headers.......................................................................................................................................33
Figure 17: HDMI Connector.......................................................................................................................................33
Figure 18: 40 pin LVDS Display Connector .................................................................................................................34
Figure 19: USB Touch Connector ...............................................................................................................................36
Figure 20: 4-lane MIPI DSI Connector........................................................................................................................37
Figure 21: 2-lane MIPI DSI Connector (Optional) .......................................................................................................39
Figure 22: M.2 Key B Connector ................................................................................................................................41
Figure 23: M.2 Module Insertion Guide.....................................................................................................................44
Figure 24: Nano SIM Connector.................................................................................................................................45
Figure 25: Expansion Connector................................................................................................................................46
Figure 26: Fan Connector ..........................................................................................................................................49
Figure 27: RTC Battery Connector .............................................................................................................................50
Figure 28: JTAG Header.............................................................................................................................................51
Figure 29: Power ON/OFF Switch ..............................................................................................................................52
Figure 30: Reset Switch.............................................................................................................................................52
Figure 31: CPU ON/OFF Switch..................................................................................................................................53
Figure 32: Power Input Jack ......................................................................................................................................57
Figure 33: Mechanical Dimension of Heat sink ..........................................................................................................60
Figure 34: i.MX 8M Plus Pico ITX SBC Mechanical Dimensions Top View....................................................................61
Figure 35: i.MX 8M Plus Pico ITX SBC Mechanical Dimensions Bottom View..............................................................61
Figure 36: i.MX 8M Plus Pico ITX SBC Mechanical Dimensions - Side View 1 ..............................................................62
Figure 37: i.MX 8M Plus Pico ITX SBC Mechanical Dimensions - Side View 2 ..............................................................62

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List of Tables
Table 1: Acronyms & Abbreviations.............................................................................................................................8
Table 2: Terminology ................................................................................................................................................10
Table 3: Boot Media Settings.....................................................................................................................................18
Table 4: CAN Header Pinout......................................................................................................................................25
Table 5: Debug UART Header Pinout .........................................................................................................................26
Table 6: RS232 Data UART Header Pinout .................................................................................................................27
Table 7: MIPI CSI Connector Pinouts..........................................................................................................................28
Table 8: MIPI CSI 40 Pin Connector Pinouts(Optional) ...............................................................................................30
Table 9: 40 Pin 10.1” LVDS Display Pinout .................................................................................................................34
Table 10: LVDS Display Touch Pinouts .......................................................................................................................36
Table 11: 4-Lane MIPI DSI Connector Pinouts............................................................................................................37
Table 12: 2-lane MIPI DSI Connector Pinouts.............................................................................................................39
Table 13: M.2 Connector Pinout................................................................................................................................41
Table 14: Expansion Connector Pinouts.....................................................................................................................46
Table 15: Fan Connector Pin Assignment...................................................................................................................49
Table 16: RTC Battery Header Pin Assignment...........................................................................................................50
Table 17: JTAG Header Pin Assignment .....................................................................................................................51
Table 18: i.MX 8M Plus CPU IOMUX for Expansion Connector interfaces...................................................................54
Table 19: Power Input Requirement..........................................................................................................................57
Table 20: i.MX 8M plus Pico ITX SBC Power Consumption .........................................................................................58
Table 21: Environmental Specification.......................................................................................................................59
Table 22: Orderable Product Part Numbers...............................................................................................................63

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1. INTRODUCTION
1.1 Purpose
This document is the Hardware User Guide for the Pico ITX Single Board Computer based on the NXP’s i.MX 8M Plus
Application processor. This board is fully supported by iWave Systems Technologies Pvt. Ltd. This Guide provides
detailed information on the overall design and usage of the i.MX 8M Plus Pico ITX SBC from a Hardware Systems
perspective.
1.2 Pico ITX SBC Overview
The Pico ITX is a versatile small form factor SBC (Single Board Computer) definition targeting application that require
low power, low costs, and high performance. The SBCs are used as building blocks for portable and stationary
embedded systems. The core CPU and support circuits, including DRAM, boot flash, power sequencing, CPU power
supplies, GBE, GNSS module, LVDS and HDMI display connectors are concentrated on the SBC.
iWave’s i.MX 8M Plus Pico ITX Single Board computer is rich with i.MX 8M Plus features along with eMMC, Dual
Ethernet connector, Dual USB3.0 connector, GNSS module, Wi-Fi & BT module and comes in compact 100mm x 72mm
form factor.
1.3 List of Acronyms
The following acronyms will be used throughout this document.
Table 1: Acronyms & Abbreviations
Acronyms
Abbreviations
ARM
Advanced RISC Machine
BT
Bluetooth
CAN
Controller Area Network
CMOS
Complementary Metal-Oxide Semiconductor
CPU
Central Processing Unit
CTS
Clear to Send
CSI
Camera Serial Interface
DSI
Display Serial Interface
eMMC
Enhanced Multi Media Card
GB
Giga Byte
Gbps
Gigabits per sec
GPIO
General Purpose Input Output
GPU
Graphics Processing Unit
HDMI
High-Definition Multimedia Interface
I2C
Inter-Integrated Circuit
I2S
Inter-Integrated Sound
IC
Integrated Circuit

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Acronyms
Abbreviations
JTAG
Joint Test Action Group
LPDDR4
Low Power Double Data Rate4
LVDS
Low Voltage Differential Signal
MHz
Mega Hertz
MIPI
Mobile Industry Processor Interface
OSM
Open standard Module
OTG
On-The-Go
PCB
Printed Circuit Sheet
PCIe
Peripheral Component Interconnect express
PMIC
Power management integrated circuits
RAM
Random Access Memory
RGMII
Reduced gigabit media-independent interface
RoHS
Restriction of Hazardous Substances
RTC
Real Time Clock
RTS
Request to Send
SAI
Serial Audio Interface
SD
Secure Digital
SoC
System on Chip
SBC
Single Board Computer
TBD
To Be Defined
UART
Universal Asynchronous Receiver/Transmitter
USB
Universal Serial Bus
USB OTG
USB On The Go
Wi-Fi
Wireless Fidelity

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1.4 Terminology Description
In this document, wherever Signal Type is mentioned, below terminology is used.
Table 2: Terminology
Terminology
Description
I
Input Signal
O
Output Signal
IO
Bidirectional Input/output Signal
CMOS
Complementary Metal Oxide Semiconductor Signal
GBE
Gigabit Ethernet Signal
LVDS
Low Voltage Differential Signal
MIPI
Mobile Industry Processor Interface Signal
OD
Open Drain Signal
OC
Open Collector Signal
PCIe
Peripheral Component Interconnect Express Signal
USB
Universal Serial Bus Signal
Power
Power Pin
PU
Pull Up
PD
Pull Down
NA
Not Applicable
NC
Not Connected
Note: Signal Type does not include internal pull-ups or pull-downs implemented by the chip vendors and only includes
the pull-ups or pull-downs implemented on SBC.
1.5 References
•IMX8MPXEC_Rev_x.pdf
•iMX_8M_Plus_RM_Revx.pdf
•OSM Specification V1.0
•iW-RainboW-G40M_i.MX_8M_Plus_OSM_LGA_Module-HardwareUserGuide-RX.0-RELx.ypdf

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1.6 Important Note
In this document, wherever i.MX 8M Plus SoC signal name is mentioned, it is followed as per below format for easy
understanding.
•If CPU pin doesn’t have multiplexing option or used for dedicated functionality then the signal name is
mentioned as functionality name.
“Functionality Name”
Example: ENET_TXC
In this signal, ENET_TXC pad is used for same functionality.
•If CPU pin selected as GPIO function, then the signal name is mentioned as
“Functionality Description (GPIO Number)”
Example: BCONFIG_0(GPIO1_9)
In this signal, BCONFIG_0 is the GPIO functionality which we are using and GPIO1_9 is the GPIO number.
Note: The above naming is not applicable for other signals which are not connected to CPU.

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2. ARCHITECTURE AND DESIGN
This section provides detailed information about i.MX 8M Plus Pico ITX SBC features and Hardware architecture with
high level block diagram.
2.1 i.MX 8M Plus Pico ITX SBC Block Diagram
iWave Systems Technologies Pvt. Ltd.
[email protected]
iW-RainboW-G40S - i.MX 8M Plus Pico ITX SBC Block Diagram
ENET_QOS
ENET1
RJ45 Stack
To On-Board
Peripherals &
SOM
Left
Right
Debug UART
Header
CAN Header
UART4
CAN
Transceiver FLEXCAN1
Power Jack
On-Board
Regulators &
PMIC
RTC Coin Cell
Holder
VRTC_3V
RGMII
RGMII
Gigabit Ethernet-0
JTAG JTAG Header
SAI2
Audio IN/OUTJack
Expansion
Connector
ECSPI1 SPI Flash
SAI2
I2C2
Audio In & Out
Audio amplifier
SpeakerHeader Line In & Out
UART2 RS232
Transceiver RS232 Header
I2C2
I2C1 RTC Controller
(Optional)
FLEXCAN2
i.MX 8M Plus SoC
Gigabit Ethernet-1
CAN x 1
UART1
Boot mode[1:0]
Boot mode Boot mode switch
VRTC_3V
LVDS0 LVDS Display
Connector (10.1”)
MIPI_DSI1
MIPI Display
Connector (7’’)
MIPI Display
Connector (5.5’’)
MIPI DSI[1:0]
I2C2
I2C1
MIPI CSI1
36pin Camera
Connector
MIPI CSI[3:0]
I2C3
uSDHC2
Micro SD Conn. SD2[3:0]
I2C5
MIPI DSI[3:0]
UART3 UART3
GNSS
Module
Ant. Conn.
I2C
GNSS Antenna
Connector
I2S Audio
Codec
Gigabit
Ethernet PHY
Gigabit
Ethernet PHY
32bit
LPDDR4
2GB(Expandabl
e)
DDRC
uSDHC3
MMC(8bit)
eMMC –16GB
(Expandable)
Wi-Fi/BT
Module
uSDHC1(4 bit) uSDHC1
UART1
RTC Controller I2C3
VRTC_3V
Wi-Fi Ant. Conn.
I2C3
UART1
Programming header FORCE_RECOV#
Debug UART x 1
VIN_5V
USB_OTG1
Debug UART x1
12V
USB_VD
PWM1
ECSPI2
LVDS1 uSDHC1[7:0]
MIPI CSI2 MIPI CSI[1:0]
40pin Camera
Connector
(Optional)
MIPI CSI[3:0]
I2C2
I2C3
I2C2
USB Switch
USB Type C
Connector
USB3.0 Stack
Top
Bottom
USB1
USB2_3.0
USB2_2.0
USB2.0
1:4 Hub
USB Header
M.2 Key-B
Connector
USB Switch
USB micro AB
Connector
PCIe
Nano SIM
Connector I2C2
USB_VD
SAI3
SAI
HDMI Connector
HDMI HDMI TX x 1
BT Ant. Conn.
Ant. Conn.
WL_PCIex1
WL_PCIex1
EARC_N_HPD
EARC_P_UTIL
Figure 1: i.MX 8M Plus Pico ITX SBC Block Diagram

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2.2 i.MX 8M Plus Pico ITX SBC Features
i.MX 8M Plus Pico ITX SBC supports the following features.
CPU
•i.MX 8M Plus Applications Processor1
oi.MX 8M Plus Quad : 4 x Cortex-A53, 1 x Cortex-M7, GPU, VPU, NPU, ISP & HiFi4 Audio DSP
oi.MX 8M Plus Quad Lite : 4 x Cortex-A53, 1 x Cortex-M7 & GPU
oi.MX 8M Plus Dual : 2 x Cortex-A53, 1 x Cortex-M7, GPU, VPU, NPU, ISP & HiFi4 Audio DSP
Power
•PCA9450C PMIC
Memory
•LPDDR4 - 2GB (Expandable up to 8GB)
•eMMC Flash - 16GB (Expandable)2
•Micro SD slot
•16Mb SPI Flash
Network & Communication
•WiFi 802.11a/b/g/n/ac/ax (ax is optional) + Bluetooth 5.0 Module
•Gigabit Ethernet PHY Transceiver with RJ45 Magjack Connector x 2
•USB 2.0, 4-Port Hub
•USB 3.0 x 2 (Dual stack type-A connector)
•USB Type-C Connector
•USB 2.0 OTG port through –micro AB Receptacle Connector
•GNSS Module
•RS232 Header x 1
•USB Header x 1
•CAN Header x 1
Audio/Video Features
•HDMI Output through HDMI (Type A) Connector
•40pin, LVDS Display Connector
•I2S Audio Codec
•3.5mm Audio IN/OUT
•Speaker out header

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•36pin MIPI_CSI Camera Connector
•40pin MIPI_CSI Camera Connector (Optional)
•39pin, 4 Lane MIPI_DSI Display Connector
•15pin, 2 Lane MIPI_DSI Display Connector (Optional)
Expansion Connector Interfaces
•4 lane LVDS x 1 Channel
•UART x 1 Port (Optional) 3
•8-bit SD (Optional) 4
•SPI x 1 Port
•PWM x 1 Port
•CAN x 1 Port
Miscellaneous Interfaces
•RTC Controller with RTC Battery Header
•Debug UART Header
•JTAG Connector
•M.2 Connector Key B
oPCIe × 1
oUSB 2.0 x 1
oI2C x 1
oNano SIM Connector
General Specification
•Power Supply : 12V,2A5
•Form Factor : 100mm X 72mm
1. There are six configurations of i.MX 8M Plus SoC supported by NXP, hence in this document i.MX 8M Plus
Q/QL/D/DL/S/SL is used to represent either of one based on SBC Part Number.
2. Memory Size will differ based on iWave’s SBC Product Part Number.
3. In default configuration, UART1 interface of i.MX 8M Plus is connected to the Bluetooth module. UART with CTS
and RTS in the Expansion connector can be supported, if Bluetooth is not supported.
4. In default configuration, If Wi-Fi module is used, 8-bit SD will not be supported on Expansion connector.
5. The i.MX 8M Plus SBC can support input power 7V to 24V. By default, it is designed to support 12V.

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2.3 i.MX 8M Plus SoC
iW-RainboW-G40S Pico ITX SBC can support i.MX 8M Plus SoCs from NXP. The i.MX 8M Plus Family consists of three
processors: i.MX 8M Plus Quad, I.MX 8M Plus Quad Lite & i.MX 8M Plus Dual. The Major Difference between i.MX
8M Plus SoCs are:
•i.MX 8M Plus Quad : 4 x Cortex-A53, 1 x Cortex-M7, GPU, VPU, NPU, ISP & HiFi4 Audio DSP
•i.MX 8M Plus Quad Lite : 4 x Cortex-A53, 1 x Cortex-M7 & GPU
•i.MX 8M Plus Dual : 2 x Cortex-A53, 1 x Cortex-M7, GPU, VPU, NPU, ISP & HiFi4 Audio DSP
The i.MX 8M Plus processors along with ARM core supports integrated NPU of 2.3 TOPs, OpenCL 1.2 GPU, Image
Signal Processor, 1080p60 video encode and decode capable VPU, 3 x display controllers, multiple display output
options, including MIPI_DSI, HDMI 2.0, and LVDS. Memory interfaces supporting LPDDR4, Quad SPI/Octal SPI
(FlexSPI), eMMC 5.1, SD 3.0 and a wide range of peripheral I/Os such as PCIe Gen3 provide wide flexibility.
Figure 2: i.MX 8M Plus Block Diagram
Note: The i.MX 8M Plus processor offers numerous advanced features, please refer the latest i.MX 8M Plus Datasheet
& Reference Manual for Electrical characteristics and other information, which may be revised from time to time.

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2.4 PMIC
The i.MX 8M Plus Pico ITX SBC uses one PCA9450C PMIC (U3) for module power management. The PCA9450C features
six high efficiency step-down regulators and five linear regulators. It is a high-performance power management
integrated circuit (PMIC) that provides a highly programmable/configurable architecture with fully integrated power
devices and built-in one-time programmable memory stores key start up configurations, drastically reducing external
components typically used to set output voltage and sequence of external regulators. Regulator parameters are
adjustable through high-speed I2C after start up offering flexibility for different system states. The PCA9450C PMIC
comes in 56pin 7x7 QFN Package and is placed on the Top side of the SBC.

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2.5 Memory
2.5.1 LPDDR4 RAM
The i.MX 8M Plus Pico ITX SBC supports 2GB LPDDR4 RAM memory by default using 32bit DDR_CH0 channel of i.MX
8M Plus SoC to support LPDDR4 up to 2GHz. LPDDR4 part U12 is placed on Top side of the SBC. The RAM size can be
expandable up to maximum of 8GB (if chips are available). To customize the LPDDR4 memory size, contact iWave.
2.5.2 eMMC Flash
The i.MX 8M Plus Pico ITX SBC supports 16GB eMMC as default boot and storage device. This is directly connected to
uSDHC3 controller of the i.MX 8M Plus SoC and operates at 1.8V (I/O supply) and 3.3V (NAND core supply) Voltage
levels.
The eMMC flash memory is physically located on bottom side of the LGA Module. The memory size of the eMMC Flash
can be customised based on the requirement by contacting iWave Support Team.
2.5.3 Micro SD Connector
The i.MX 8M Plus Pico ITX SBC supports Micro SD slot which can be used to connect Micro SD card as optional boot
device as well as Mass storage device. Micro SD card connector (J26) is directly connected to the USDHC2 controller
of the i.MX 8M Plus SoC. The main power to Micro SD Card Connector is 3.3 Voltage. The i.MX 8M Plus Pico ITX SBC
supports configurable I/O voltage levels for uSDHC2 lines through GPIO1_IO4. If GPIO1_IO4 is set to low, then 3.3V IO
level is selected for uSDHC2 lines. If GPIO1_IO4 is set to high, then 1.8V IO level is selected for uSDHC2 lines. The
micro–SD Connector is physically located on bottom side of the i.MX 8M Plus Pico ITX SBC as shown below.
Figure 3: Micro SD Card Connector

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2.6 Boot Media Setting
i.MX 8M Plus SoC boot process begins at Power on Reset (POR) where the hardware reset logic forces the ARM core
to begin execution starting from the on-chip boot ROM. i.MX 8M Plus SoC Boot ROM code uses the state of the internal
register BOOT_MODE [1:0] as well as the state of various eFUSEs and/or GPIO settings to determine the boot flow
behaviour of the device.
Note: Contact iWave if different boot media support is required other than eMMC.
Figure 4: Boot Media Switch
Table 3: Boot Media Settings
Boot Media
Pin number
SW1 (4 Position Switch)
POS1
POS2
POS3
POS4
eMMC
1
OFF
OFF
OFF
OFF
uSD
2
ON
OFF
OFF
OFF
Serial Download mode
3
OFF
OFF
ON
OFF

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iWave Systems Technologies Pvt. Ltd.
2.7 Network & Communication
2.7.1 Wi-Fi and Bluetooth Interface
The i.MX 8M Plus Pico ITX SBC is integrated with u-blox’s “JODY-W263” or “JODY-W374/JODY-W377” based Wi-Fi and
Bluetooth module. The JODY-W2 series are compactmodules based on the NXP 88W8987 AEC-Q100 compliant chipset
and JODY-W3 series are based on the NXP 88W9098 chipset. They enable Wi-Fi, Bluetooth, and Bluetooth low energy
communication.
The JODY-W2 modules can be operated in the following modes:
• Wi-Fi 1x1 802.11a/b/g/n/ac in 2.4 GHz or 5 GHz.
• Dual-mode Bluetooth 5.2, including audio, can be operated fully simultaneous with Wi-Fi.
The JODY-W2 undergoes extended automotive qualification according to ISO 16750-4 and is manufactured in line with
ISO/TS 16949. Connection to a host processor is through SDIO, or High-Speed UART interfaces. The i.MX 8M Plus SBC
uses processor’s UART1 interface for Bluetooth and USDHC3 interface for Wi-Fi in a default configuration.
The JODY-W3 modules can be operated in the following modes:
• Wi-Fi 1x1 802.11a/b/g/n/ac/ax in 2.4 GHz and 5 GHz.
• Concurrent Dual Wi-Fi operation with independent MACs, supporting simultaneous Wi-Fi network operation at
two different frequency bands.
• Dual-mode Bluetooth 5.3, can be operated fully simultaneous with Wi-Fi.
JODY-W3 modules undergo extended qualification testing in accordance with u-blox Qualification Policy based on AEC-
Q104 and are manufactured in line with ISO/TS 16949 AEC-Q104. Host processor connections are made through
various interfaces, including PCIe or SDIO for Wi-Fi and highspeed UART for Bluetooth. For 802.11ax, the i.MX 8M Plus
SBC uses processor’s PCIe interface for Wi-Fi6.
Antenna pins of JODY-W2/W3 Bluetooth and Wi-Fi are connected to J1, J2 connectors and optionally connected to
connectors J5 and J7. J3 connector is optionally provided to support Bluetooth independently in JODY-W3.
Note: In default configuration, 802.11ax (Wi-Fi 6) is not supported, but 802.11ax can be supported by changing Wi-Fi
module from JODY-W2 to JODY-W3 and some additional changes. Contact iWave Support Team for further information.

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i.MX 8M Plus Pico ITX SBC Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
Figure 5: Wi-Fi and Bluetooth Antenna Connector
Connector Part Number - : RECE-20449-001E-01 from Taoglas Limited / MM4829-2702RA4 from Murata.
Antenna Part Number - : FXP830.24.0100B from Taoglas Limited / 2042811100 from Molex
2.7.2 Gigabit Ethernet Interface
The i.MX 8M Plus Pico ITX SBC supports Dual Ethernet Port through external Ethernet PHYs.
The Ethernet PHY AR8031 integrates Atheros Green ETHOS® power saving technologies and significantly saves power
not only during the work time, but also overtime. Atheros Green ETHOS® power savings include ultra-low power in
cable unplugged mode or port power down mode, and automatic optimized power saving based on cable length. The
AR8031 also supports IEEE 802.3az EEE standard (Energy Efficient Ethernet) and Atheros proprietary Smart EEE. The
Smart EEE allows legacy MAC/SoC devices without 802.3az support to function as a complete 802.3az system.