VAR-SOM-MX91 :
NXP i.MX91

Starting from $34

An ideal solution for low-end and price-sensitive devices based on the NXP i.MX91 processor.

The VAR-SOM-MX91 System on Module runs on a 1.4GHz Cortex™-A55 NXP iMX91 processor and provides energy-flex architecture, built-in security along with industrial temperature grade and integrated connectivity options such as dual CAN-FD, dual GbE and certified dual-band Wi-Fi 802.11 ax/ac/a/b/g/n with optional 802.15.4 and BT/BLE 5.4.

The VAR-SOM-MX91 SoM is compatible with the VAR-SOM Pin2Pin family, providing maximum scalability and leading-edge capabilities; from entry-level i.MX6UL/6ULL platforms, through i.MX 8M NANO/MINI/PLUS, i.MX 93 and AM62x, up to i.MX 8X and 8QuadMax high-performance platforms.

For the complete Pin2Pin product list, check out Variscite’s Pin2Pin System on Module product families.

* The Pin2Pin compatibility depends on pinmux options; please verify the detailed pinout table in the related SoM to confirm compatibility is maintained in your specific design.

** Variscite’s i.MX 91 System on Module (SoM) is in development at this stage. The information on this page is subject to change without notice. For additional information contact us.

Specifications

CPU	Up to 1.4GHz Single Cortex-A55 NXP i.MX91
High Speed Interfaces	2x USB2.0, 2x GbE
Certified WiFi/BT	Wi-Fi 6 802.11 ax/ac/a/b/g/n with optional 802.15.4 and BT/BLE 5.4
Security	Security subsystem with cryptographic accelerators
Temperature range	-40 to 85°C
Product Longevity	2039
Pin2pin Family	VAR-SOM Pin2Pin family

CPU Name	NXP i.MX 91
CPU Type	Cortex™-A55
CPU Cores	1 core
CPU Clock (Max)	Up to 1.4GHz
Integer performance (DMIPS)	Up to 3,710

RAM	512MB – 2GB LPDDR4
eMMC	8 – 128 GB

Multimedia
Camera Interfaces	8bit Parallel

Display
Parallel RGB	1366x768p60 or 1280x800p60
Touch controller	Resistive, Capacitive

Audio
Headphone driver	Yes
Microphone	Digital, Analog (stereo)
Digital audio serial interface	3 x I2S(SAI),S/PDIF,RX TX, PDM 4CH
Line In/Out	Yes

Connectivity
SD / MMC	x2
USB Host / Device	USB2.0: 2x OTG
UART	x8, up to 5 Mbps
I2C	x7
I3C	x2
SPI	x7
CAN Bus	x2
RTC	On carrier
JTAG	x1
ADC	x4

Networking
Ethernet	2x 10/100/1000 Mbps
Wi-Fi	Certified Wi-Fi 6 dual-band 802.11ax/ac/a/b/g/n with optional 802.15.4
Bluetooth	BT/BLE5.4

Linux	Yocto, Debian

Mechanical Specifications
Dimensions (W x L)	67.8 x 33mm

Electronic Specifications
Supply voltage	3.3V or 3.4-5V
Digital I/O voltage	3.3V/1.8V

Environmental Specifications
Commercial operating temperature	0 to 70°C
Extended operating temperature	-25 to 85°C
Industrial operating temperature	-40 to 85°C
Storage temperature	-40 to 85°C
Storage humidity	5% to 95%

VAR-SOM-MX91S_[xxxx]C_[xxxx]R_[xx]G_[AC]_[EC]_[TP]_[WBD/WBE]_[VBT]_[SDEX]_[X]T
MX91S:	Processor type: i.MX 9131 single core fully featured
[xxxx]C:	CPU clock speed: 1400MHz: 1400C
[xxxx]R:	LP-DDR4: 512 MB: 512R, 1536 MB: 1536R, 2048 MB: 2048R
[xx]G:	eMMC: 8 GB : 8G, 16 GB : 16G, 32 GB : 32G, 64 GB : 64G
[AC]:	Audio Codec
[EC]:	GbE PHY (second port always via RGMII)
[TP]:	Resistive touch panel controller (note: not available with WBE option)
[WBD/WBE]	WBD: Built-in certified single band Wi-Fi 802.11 ax/ac/a/b/g/n + BT/BLE 5.4 WBE: Built-in certified single band Wi-Fi 802.11 ax/ac/a/b/g/n + BT/BLE 5.4 + 802.15.4
[VBT]	Default: Standard supply voltage VBT: Higher battery supply voltage
[SDEX]	Default: no additional external SDIO SDEX: additional external SDIO (available only without WBD/WBE)
[x]T:	C : 0 to 70°C, E: -25 to 85°C, I : -40 to 85°C

Note: All options in [brackets] are optional add-ons that can be either removed or selected from a list of options

VAR-SOM-MX91 Evaluation Kits

The VAR-SOM-MX91 Development Kit and Starter Kit can serve as a complete development platform for both evaluation and application development purposes. The kits provide a great showcase of the VAR-SOM-MX91 connectivity features and performance.