iWave iW-RainboW-G50S Installation manual

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i.MX 93 or i.MX 91 Pico ITX SBC Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
iW-RainboW-G50S
i.MX 93 or i.MX 91 Pico ITX Single Board
Computer
Hardware User Guide
DRAFT VERSION SUBJECT TO CHANGE

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i.MX 93 or i.MX 91 Pico ITX SBC Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
Document Revision History
Document Number
iW-PRGJJ-UM-01-R2.0-REL0.1 _imx93picoitxsbc-Hardware
Revision
Date
Description
0.1
22nd March2023
Initial Draft Release
0.2
11th July 2023
Updated i.MX 93 Pico ITX SBC Power Consumption table
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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i.MX 93 or i.MX 91 Pico ITX SBC Hardware User Guide
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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i.MX 93 or i.MX 91 Pico ITX SBC Hardware User Guide
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 93 or i.MX 91 Pico ITX SBC Block Diagram ..........................................................................................12
2.2 i.MX 93 or i.MX 91 Pico ITX SBC Features...................................................................................................13
2.3 CPU ...........................................................................................................................................................15
2.3.1 i.MX 93 CPU...........................................................................................................................................15
2.3.2 i.MX 91 CPU...........................................................................................................................................16
2.4 PMIC..........................................................................................................................................................17
2.5 Memory.....................................................................................................................................................18
2.5.1 LPDDR4X/LPDDR4..................................................................................................................................18
2.5.2 eMMC Flash...........................................................................................................................................18
2.5.3 Micro SD connector................................................................................................................................18
2.5.4 SPI Flash ................................................................................................................................................19
2.6 Boot Media Setting....................................................................................................................................20
2.7 Network & Communication .......................................................................................................................21
2.7.1 Wi-Fi and Bluetooth Interface ................................................................................................................21
2.7.2 Gigabit Ethernet Interface......................................................................................................................22
2.7.3 USB2.0 OTG Interface ............................................................................................................................22
2.7.4 GNSS Module (Optional) ........................................................................................................................24
2.7.5 USB2.0 Host Port....................................................................................................................................24
2.7.6 CAN Interface.........................................................................................................................................25
2.8 Serial Interface Features............................................................................................................................27
2.8.1 Debug UART Interface............................................................................................................................27
2.8.2 RS232 Data UART Interface....................................................................................................................28
2.9 Audio/Video Features................................................................................................................................29
2.9.1 MIPI CSI Interface (Not available in i.MX 91) ..........................................................................................29
2.9.2 LVDS Interface (Not available in i.MX 91) ...............................................................................................31
2.9.3 USB Touch Connector.............................................................................................................................32
2.9.4 MIPI DSI Interface (Not available in i.MX 91)..........................................................................................33
2.9.5 2-Lane MIPI DSI Display Connector (Optional) ........................................................................................35
2.9.6 I2S Audio Interface.................................................................................................................................36
2.10 M.2 Key-B Connector.................................................................................................................................38
2.11 Expansion Connector.................................................................................................................................42
2.12 Other Features ..........................................................................................................................................45

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2.12.1 Fan Header ............................................................................................................................................45
2.12.2 RTC Controller with RTC Battery Header.................................................................................................45
2.12.3 JTAG Interface (Optional).......................................................................................................................46
2.12.4 Power ON/OFF Switch............................................................................................................................48
2.12.5 Reset Switch ..........................................................................................................................................48
2.12.6 CPU ON/OFF Switch ...............................................................................................................................49
2.13 i.MX 93 or i.MX 91 Pin Multiplexing on Expansion Connector ....................................................................50
3. TECHNICAL SPECIFICATION...............................................................................................................................51
3.1 Electrical Characteristics............................................................................................................................51
3.1.1 Power Input Requirement ......................................................................................................................51
3.2 Power Consumption ..................................................................................................................................52
3.3 EnvironmentalCharacteristics ....................................................................................................................54
3.3.1 Environmental Specification...................................................................................................................54
3.3.2 Heat Sink ...............................................................................................................................................54
3.3.3 RoHS Compliance...................................................................................................................................55
3.3.4 Electrostatic Discharge...........................................................................................................................55
3.4 MechanicalCharacteristics .........................................................................................................................56
3.4.1 i.MX 93 or i.MX 91 Pico ITX SBC Mechanical Dimensions ........................................................................56
4. ORDERING INFORMATION................................................................................................................................58

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List of Figures
Figure 1: i.MX 93 or i.MX 91 Pico ITX SBC Block Diagram ...........................................................................................12
Figure 2: i.MX 93 SoC Block Diagram .........................................................................................................................15
Figure 3: i.MX 91 SoC Block Diagram .........................................................................................................................16
Figure 3: Micro SD Card Connector ...........................................................................................................................18
Figure 4: Boot Media Switch .....................................................................................................................................20
Figure 5: Wi-Fi and Bluetooth Antenna Connector ....................................................................................................21
Figure 6: Dual RJ45 Magjack......................................................................................................................................22
Figure 7: USB OTG Connector....................................................................................................................................23
Figure 7: USB Switch Header.....................................................................................................................................23
Figure 8: GNSS Antenna Connector ...........................................................................................................................24
Figure 9: USB2.0 Host-Top Port & type-C Connector..................................................................................................25
Figure 10: USB2.0 Host-Bottom Port .........................................................................................................................25
Figure 11: CAN Header..............................................................................................................................................26
Figure 12: Debug UART Header.................................................................................................................................27
Figure 13: RS232 Header...........................................................................................................................................28
Figure 14: 36 pin MIPI CSI Connector ........................................................................................................................29
Figure 15: 40 pin LVDS Display Connector .................................................................................................................31
Figure 16: USB Touch Connector ...............................................................................................................................32
Figure 17: 4 Lane MIPI DSI Connector........................................................................................................................33
Figure 18: MIPI DSI 2-Lane display Connector (Optional)...........................................................................................35
Figure 19: Audio IN/OUT Jack....................................................................................................................................36
Figure 20: Speaker Headers.......................................................................................................................................37
Figure 21: M.2 Key B Connector ................................................................................................................................38
Figure 22: M.2 Module Insertion Guide.....................................................................................................................41
Figure 23: Expansion Connector................................................................................................................................42
Figure 24: Fan Connector ..........................................................................................................................................45
Figure 25: RTC Battery Connector .............................................................................................................................46
Figure 26: JTAG Header.............................................................................................................................................47
Figure 27: Power ON/OFF Switch ..............................................................................................................................48
Figure 28: Reset Switch.............................................................................................................................................49
Figure 29: CPU ON/OFF Switch..................................................................................................................................49
Figure 30: Power Input Jack ......................................................................................................................................51
Figure 31: Mechanical dimension of Heat Sink ..........................................................................................................55
Figure 32: Mechanical Dimensions of i.MX 93 or i.MX 91 Pico ITX SBC Top View .......................................................56
Figure 33: Mechanical Dimensions of i.MX 93 or i.MX 91 Pico ITX SBC Side View-1....................................................56
Figure 34: Mechanical Dimensions of i.MX 93 or i.MX 91 Pico ITX SBC Bottom View..................................................57
Figure 35: Mechanical Dimensions of i.MX 93 or i.MX 91 Pico ITX SBC Side View-2....................................................57

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List of Tables
Table 1: Acronyms & Abbreviations.............................................................................................................................8
Table 2: Terminology ................................................................................................................................................10
Table 3: Boot Media Settings.....................................................................................................................................20
Table 4: USB Switch Header Pinout ...........................................................................................................................23
Table 4: CAN Header Pinout......................................................................................................................................26
Table 5: Debug UART Header Pinout .........................................................................................................................27
Table 6: RS232 Data UART Header Pinout .................................................................................................................28
Table 7: MIPI CSI Connector Pinouts..........................................................................................................................29
Table 8: 40 Pin LVDS Display Connector Pinout .........................................................................................................31
Table 9: USB Touch Header Pinouts...........................................................................................................................33
Table 10: 4-Lane MIPI DSI Connector Pinouts............................................................................................................34
Table 11: Optional 2-Lane MIPI DSI Connector Pinouts..............................................................................................35
Table 12: Speaker Header(J10) Pinout.......................................................................................................................37
Table 13: Speaker Header(J11) Pinout.......................................................................................................................37
Table 14: M.2 Connector Pinout................................................................................................................................38
Table 15: Expansion Connector Pinouts.....................................................................................................................42
Table 16: Fan Connector Pin Assignment...................................................................................................................45
Table 17: RTC Battery Header Pin Assignment...........................................................................................................46
Table 18: JTAG Header Pin Assignment .....................................................................................................................47
Table 19: i.MX 93 or i.MX 91 SoC IOMUX for Expansion Connector interfaces ...........................................................50
Table 20: Power Input Requirement..........................................................................................................................51
Table 21: i.MX 93 Pico ITX SBC Power Consumption..................................................................................................52
Table 21: i.MX 91 Pico ITX SBC Power Consumption..................................................................................................53
Table 22: Environmental Specification.......................................................................................................................54
Table 23: Orderable Product Part Numbers...............................................................................................................58

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iWave Systems Technologies Pvt. Ltd.
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 93 or
i.MX 91 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 93 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, LVDS and MIPI display connectors are concentrated on the SBC.
NXP’s i.MX 93 or i.MX 91 SoC based Pico ITX Single Board computer is rich with i.MX 93 or i.MX 91 features along
with eMMC, Dual Ethernet PHY, USB2.0 Hub, 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
I2C
Inter-Integrated Circuit
I2S
Inter-Integrated Sound
IC
Integrated Circuit
JTAG
Joint Test Action Group

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Acronyms
Abbreviations
LPDDR4
Low Power Double Data Rate4
MHz
Mega Hertz
OTG
On-The-Go
PCB
Printed Circuit Sheet
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
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
•IMX93IEC_Rev_x.pdf
•IMX91PEC_Revx
•i.MX93RM Rev_x.pdf

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1.6 Important Note
In this document, wherever i.MX 93 or i.MX 91 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 93 or i.MX 91 Pico ITX SBC features and Hardware architecture
with high level block diagram.
2.1 i.MX 93 or i.MX 91 Pico ITX SBC Block Diagram
iWave Systems Technologies Pvt. Ltd.
[e-mail]
iW-RainboW-G50S - i.MX 93 or i.MX 91 Pico ITX SBC Block Diagram
ENET0
ENET1
RJ45 Stack
To On-Board
Peripherals &
SOM
Left
Right
M.2 Module
Connector
Debug Header
CAN Header
UART1
CAN
Transceiver
CAN1
Power Jack
On-Board
Regulators &
PMIC
RTC Coin Cell
Holder
VRTC_3V
RGMII
RGMII
Gigabit Ethernet-0
JTAG JTAG Header
SAI1
Audio IN/OUT Jack
Expansion
Connector
SPI4 SPI Flash
SAI1
I2C7
Audio In & Out
Audio amplifier
Speaker Header Line In & Out
USB_OTG1
USB Switch
USB micro AB
Connector
UART5 RS232
Transceiver RS232 Header
I2C7
I2C3
RTC Controller
(Optional)
CAN2
USB_OTG2
USB Header
i.MX 93 or i.MX 91 SoC
Gigabit Ethernet-1 CAN x 1
UART8 x 1
Boot mode[1:0]
Boot mode Boot mode switch
VRTC_3V
UART8
USB Switch
USB Type C
Connector LVDS0*LVDS
Connector (10.1”)
MIPI DSI1*
MIPI Display
Connector (7’’)
MIPI Display
Connector (5.5’’)
MIPI DSI[1:0]
I2C7
I2C3
MIPI CSI0*
MIPI CSI0
Connector
MIPI CSI[1:0]
I2C7 SD2 Micro SD Conn.
SD2(4bit)
I2C3
PWM
MIPI DSI[3:0]
UART2 UART2
GNSS
Module
Antenna Conn.
I2C3
GNSS Antenna
Connector
I2S Audio
Codec
Gigabit
Ethernet PHY
USB2.0
1:4 Hub
USB2.0 Stack
Top
Bottom
Gigabit
Ethernet PHY
16bit
LPDDR4/4X-
2GB DDRC
SD1
MMC(8bit)
eMMC –16GB
(Upgradable)
Wi-Fi/BT
Module
SDIO SD3
UART8
RTC Controller I2C7
VRTC_3V
Wi-Fi/BT Ant.Conn.
I2C7
UART8
Programming header FORCE_RECOV#
Debug UART x1
VIN_5V
USB_OTG1
ANT0 Debug UART x1
USB_OTG1
12V
USB_VD
USB_VD
TPM4
USB_OTG2
TAMPER TAMPER x 2
ADC ADC x 2
Note:
* Not supported in i.MX 91 SoC
Figure 1: i.MX 93 or i.MX 91 Pico ITX SBC Block Diagram

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2.2 i.MX 93 or i.MX 91 Pico ITX SBC Features
i.MX 93 or i.MX 91 Pico ITX SBC supports the following features.
SoC
•i.MX 93 Processor1
oi.MX 9352: 2 x [email protected] ,1 x M33 core@250MHz, NPU
oi.MX 9351: 1 x [email protected] ,1 x M33 core@250MHz, NPU
oi.MX 9332: 2 x Cortex-A55@1.7GHz ,1 x M33 core@250MHz
oi.MX 9331: 1 x [email protected] ,1 x M33 core@250MHz
•i.MX 91 Processor
oi.MX 91: 1x Cortex®-A55, Parallel camera, Parallel display, 2x Ethernet, 2x USB 2.0
Power
•PCA9451 PMIC
Memory
•LPDDR4X - 2GB2,3
•eMMC Flash - 16GB (Expandable)2
•Micro SD slot
•16Mb SPI Flash4
Network & Communication
•IEEE 802.11a/b/g/n/ac/ax+ Bluetooth 5.3+ IEEE802.15.44
•Gigabit Ethernet PHY Transceiver with RJ45 Magjack Connector x 2
•USB 2.0 x 2 (Dual stack type-A connector)
•USB 2.0 OTG port through micro–AB Receptacle Connector
•USB Type-C Connector
•RS232 x 1
•CAN x 1
•GNSS Module (Optional)
Audio/Video Features
•40pin, LVDS Display Connector*
•USB Touch Header
•I2S Audio Codec
•3.5mm Audio IN/OUT
•Speaker out header
•36pin MIPI_CSI Camera Connector*

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•39pin, 4 Lane MIPI_DSI Display Connector*5
•15pin, 2 Lane MIPI_DSI Display Connector (Optional) *5
Expansion Connector Interfaces
•CAN x 1 Port
•PWM x 1
•I2C x 1
•GPIO x 1
•ADC x 2 7
•UART x 1 Port (Optional)6
•Tamper x 27 (Optional)
Miscellaneous Interfaces
•Debug UART Header
•JTAG Header
•RTC Battery Connector
•M.2-Key B Connector
oUSB 2.0 x 1
General Specification
•Power Supply : 12V, 2A8
•Form Factor : 100mm X 72mm
•Temperature Support : -40°C to +85°C (Industrial Grade)
•Environment Specification : RoHS2 and REACH Compliance
1. There are four configurations of i.MX 93 Processor, hence this document is used to represent either of one based
on SOM Part Number.
2. Memory Size will differ based on iWave’s SBC Product Part Number.
3. i.MX 93 SBC supports LPDDR4X by default and i.MX 91 SBC supports LPDDR4.
4. SPI4 is shared between Wi-Fi/BT module to support IEEE802.15.4 and SPI Flash. If Wi-Fi/BT is required, SPI Flash is
not supported. If SPI is required, Wi-Fi/BT module will be made DNP.
5. By default, 4 Lane MIPI_DSI Display is supported.
6. UART8 is muxed with Bluetooth Module and Expansion Connector. By default, it is connected to Bluetooth
module.
7. Tamper and ADC signals are muxed. By default, ADC signals are available in the Expansion Connector.
8. The i.MX 93 SBC can support wide range input power from 7V to 24V. By default, it is designed to support 12V.
* Not supported in i.MX 91 SoC.

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2.3 CPU
iW-RainboW-G50S i.MX 93 or i.MX 91 Pico ITX SBC can support different i.MX 93 or i.MX 91 SoCs from NXP.
2.3.1 i.MX 93 CPU
The i.MX 93 (11 x 11 mm) Family consists of 4 processors.
•i.MX 9352: 2x Cortex®-A55, NPU, MIPI DSI, LVDS, MIPI CSI, Parallel camera, Parallel display, 2x Ethernet,
2x USB 2.0, 7x I2S TDM
•i.MX 9351: 1 x Cortex-A55, NPU, MIPI DSI, LVDS, MIPI CSI, Parallel camera, Parallel display, 2x Ethernet,
2x USB 2.0, 7x I2S TDM
•i.MX 9332: 2x Cortex®-A55, MIPI DSI, LVDS, MIPI CSI, Parallel camera, Parallel display, 2x Ethernet,
2x USB 2.0, 7x I2S TDM
•i.MX 9331: 1x Cortex®-A55, MIPI DSI, LVDS, MIPI CSI, Parallel camera, Parallel display, 2x Ethernet,
2x USB 2.0, 7x I2S TDM
The i.MX 93 includes powerful dual Arm® Cortex®-A55 processors with speeds up to 1.7 GHz integrated with a NPU
that accelerates machine learning inference. A general-purpose Arm® Cortex®-M33 running up to 250 MHz is for
real-time and low-power processing. Memory interfaces supporting 16-bit LPDDR4/LPDDRX, eMMC 5.1, SD 3.0 and a
wide range of peripheral IOs providing wide flexibility.
Figure 2: i.MX 93 SoC Block Diagram

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2.3.2 i.MX 91 CPU
The i.MX 91 (11 x 11 mm) Family consists of two processors.
•i.MX 91P1C: Industrial Grade
•i.MX 91P1D: Consumer Grade
The i.MX 91 includes powerful single Arm® Cortex®-A55 processor with speeds up to 1.4 GHz. Robust control
networks are possible via CAN-FD interface. Also, dual 1 Gbps Ethernet controllers, drive gateway applications with
low latency. Memory interfaces supporting 16-bit LPDDR4, eMMC 5.1, SD 3.0 and a wide range of peripheral IOs
providing wide flexibility.
Figure 3: i.MX 91 SoC Block Diagram
Note: The i.MX 93 and i.MX 91 processor offers numerous advanced features, please refer the latest i.MX 93 or i.MX
91 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 93 or i.MX 91 Pico ITX SBC uses one PCA9451 PMIC (U4) for module power management. The PCA9451
features six high efficiency step-down regulators and three linear regulators. The PCA9451 is a single chip Power
Management IC (PMIC) specifically designed to support i.MX 93x family processor in both 1 cell Li-Ion and Li-polymer
battery portable application and 5V adapter non-portable applications. Regulator parameters are adjustable through
high-speed I2C after start up offering flexibility for different system states. The PCA9451 PMIC comes in 56-pin
HVQFN package and is placed on the Top side of the SBC.

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2.5 Memory
2.5.1 LPDDR4X/LPDDR4
The i.MX 93 or i.MX 91 Pico ITX SBC supports 2GB RAM by using 16bit 2GB LPDDR4 IC connected to DDR_CH0
channel of the SoC. By default, LPDDR4X is supported in i.MX 93 SBC. The i.MX 91 SoC supports only LPDDR4.
LPDDR4 part U9 is placed on Top side of the SBC. To customize the LPDDR4/4X memory size, contact iWave.
2.5.2 eMMC Flash
The i.MX 93 or i.MX 91 Pico ITX SBC supports 16GB eMMC as default boot and storage device. This is directly
connected to eMMC controller of the i.MX 93 or i.MX 91 SoC and operates at 1.8V (IO supply) and 3.3V (NAND core
supply) Voltage levels.
The eMMC flash memory (U2) is physically located on Top side of the SBC. 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 93 or i.MX 91 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 93 or i.MX 91 SoC. The main power to Micro SD Card Connector is 3.3 Voltage. The i.MX 93
Pico ITX SBC supports configurable I/O voltage levels for uSDHC2 lines through SD2_VSELECT. If SD2_VSELECT is set
to low, then 3.3V IO level is selected for uSDHC2 lines. If SD2_VSELECT 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 93 or i.MX 91 Pico ITX SBC as
shown below.
Figure 4: Micro SD Card Connector

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iWave Systems Technologies Pvt. Ltd.
2.5.4 SPI Flash
The i.MX 93 or i.MX 91 Pico ITX SBC supports SPI Flash through i.MX 93 or i.MX 91 SoC’s SPI4 interface. This SPI
interface signals are connected to SPI Flash “IS25WP016D-JNLE” and operating at 1.8V Level.
Note: SPI4 is shared between Wi-Fi/BT module to support IEEE802.15.4 and OSM. If Wi-Fi/BT is required, SPI Flash is
not supported. If SPI Flash is required, Wi-Fi/BT module will be made DNP.

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i.MX 93 or i.MX 91 Pico ITX SBC Hardware User Guide
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2.6 Boot Media Setting
i.MX 93 or i.MX 91 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 93 or i.MX 91 SoC Boot ROM code uses the state
of the internal register BOOT_MODE [3:0] as well as the state of various eFUSEs and/or GPIO settings to determine
the boot flow behaviour of the device.
Figure 5: Boot Media Switch
Table 3: Boot Media Settings
Boot Media
Pin number
SW1 (4 Position
Switch)
Pin number
SW1 (4 Position
Switch)
POS1
POS2
From Internal fuses
1
ON
2
ON
eMMC
1
ON
2
OFF
Serial Download mode
1
OFF
2
ON
SD Boot
1
OFF
2
OFF