MediaTek Genio 420: specs, Yocto BSP, and how it compares to Genio 520 and 720

MediaTek Genio 420 is the low-voltage variant of Genio 520, sharing the same silicon, EVK board, and Yocto BSP. If you are evaluating the Genio 420 and wondering how it fits against the 520 and 720, the answer starts with the SoC family structure: all three platforms are development targets for the same codebase, the same machine config, and the same EVK.

Key Insights

• Genio 420 (MT8371LV) is pin-compatible with Genio 520 (MT8371) and 720 (MT8391) — same VFBGA footprint, same EVK board (P2V3), same Yocto genio-720-* machine configs
• No HDMI on any of these three platforms — display output is DisplayPort over Type-C (DPoC) only; this is the most common hardware surprise for teams coming from desktop or Genio 510/700/1200 designs
• ONNX Runtime NPU Execution Provider is only supported on Genio 420/520/720 — not on Genio 510, 700, or 1200; if your inference stack uses ONNX Runtime with NPU acceleration, this family is the correct choice
• LP4X memory support (up to 8GB) makes 420 and 520 lower BOM cost than 720 (which requires LP5X)
• Genio 420 BSP support added March 2026 in IoT Yocto v25.1.1 — the 420 is a new addition to an otherwise stable BSP

What is the Genio 420?

The MediaTek Genio 420 (SoC part number: MT8371LV) is the low-voltage, industrial-grade member of the MT8391/MT8371 SoC family. The LV suffix means lower operating voltage — the same die as MT8371 (Genio 520), manufactured to meet tighter voltage specifications, which reduces power consumption and thermal output at the cost of slightly lower peak clock headroom.

In practice, the Genio 420 and Genio 520 are software-identical. They share the same datasheet (“MT8391 MT8371 MT8371LV Application Processor Datasheet”), the same EVK user guide, the same Yocto machine configurations, and the same driver support. MediaTek added all three platforms to the same BSP release.

Genio 420 full specifications

Property	Genio 420 (MT8371LV)
SoC	MT8371LV
Process node	6nm
CPU	2× Cortex-A78 @ 2.2 GHz + 6× Cortex-A55
GPU	Mali-G57 MC2 @ 880 MHz
NPU	APUSys / MDLA (same as Genio 520 and 720)
Max RAM	8 GB LPDDR4X or LPDDR5
Storage interfaces	eMMC, UFS, SD
MIPI CSI-2	3× 4-lane
MIPI DSI	2
Display output	DisplayPort over Type-C (DPoC) only — no HDMI
PCIe	1× Gen2
GbE	1× TSN-capable
USB	USB 3.x
GPIO	177
I2C	8 + 2 I3C
SPI	6 master
UART	4
WiFi / BT	External via MT7921 (M.2/PCIe)
Package	Same VFBGA as MT8371/MT8391
Longevity	Until 2032

Genio 420 vs Genio 520 vs Genio 720

The three platforms differ in clock speed and memory, not in silicon architecture or peripheral set.

	Genio 420 (MT8371LV)	Genio 520 (MT8371)	Genio 720 (MT8391)
CPU A78 clock	2.2 GHz	2.2 GHz	2.6 GHz
GPU clock	880 MHz	880 MHz	1.1 GHz
NPU	APUSys/MDLA	APUSys/MDLA	APUSys/MDLA
Max RAM	8 GB LP4X	8 GB LP4X or 16 GB LP5	16 GB LP5X
Memory type	LP4X	LP4X or LP5	LP5X
Display	DPoC only	DPoC only	DPoC only
Yocto machine	genio-720-evk	genio-720-evk	genio-720-evk
EVK board	P2V3	P2V3	P2V3
ONNX Runtime NPU EP	Yes	Yes	Yes
BSP support since	v25.1.1 (Mar 2026)	v25.1 (Dec 2025)	v25.1 (Dec 2025)
Longevity	Until 2032	Until 2032	Until 2036

The software difference between the three is zero — same machine config, same BSP, same driver stack. A driver written and tested on Genio 720 EVK runs on Genio 420 without changes.

The hardware difference is clock speed, memory ceiling, and supply voltage. For applications that do not saturate the Genio 720’s CPU or GPU, the 420 and 520 run the same software at lower power and lower BOM cost.

Where Genio 420 fits vs the broader Genio family

The broader Genio family splits into two groups with different BSP lineages and different display capabilities:

	Genio 350/360/510/700/1200	Genio 420/520/720
HDMI output	Yes	No — DPoC only
ONNX Runtime NPU EP	No (except 520/720)	Yes
TFLite Neuron Stable Delegate	Yes (most models)	Yes
Yocto machine	Platform-specific	genio-720-* shared
Pin-compatible group	No cross-compatibility	All three compatible

The most important distinction for software teams: if your inference deployment stack uses ONNX Runtime and you need NPU acceleration, only Genio 420, 520, and 720 support the ONNX Runtime NPU Execution Provider (MDLA backend). The other Genio platforms support MDLA only through TFLite’s Neuron Stable Delegate. This is a framework-level choice that affects your entire inference stack.

When to choose Genio 420 over 520 or 720

Choose Genio 420 when:

• Your design is thermally constrained — the lower operating voltage reduces heat output, which matters in sealed industrial enclosures without active cooling
• You are targeting battery-powered operation — lower voltage directly reduces active power draw
• BOM cost matters and your workload does not saturate Genio 520 clock speeds
• You need ONNX Runtime NPU EP support but do not need Genio 720’s higher CPU/GPU clocks

Choose Genio 520 instead when:

• You want the same power profile as Genio 420 but with broader BSP history (520 support predates 420 by one release)
• LP5 memory support matters for your bandwidth requirements

Choose Genio 720 instead when:

• You need 2.6 GHz A78 cores — meaningful for CPU-bound workloads like computer vision pre/post-processing
• You need 1.1 GHz GPU clocks — relevant for GPU-accelerated inference or rendering
• You need LP5X memory at 16 GB
• Longevity is critical — Genio 720 is guaranteed until 2036 vs 2032 for 420/520

Yocto BSP status and known limitations

Genio 420 support was added to the MediaTek IoT Yocto SDK in v25.1.1 (March 2026). This is a recent addition and carries some known gaps as of this BSP release:

• ISP hardware pipeline not supported: The MIPI-CSI interface transfers raw sensor data, but the ISP hardware processing pipeline is not yet active in v25.1.x. Camera bring-up is possible for raw capture, but ISP-processed output (auto-exposure, auto-white-balance, hardware noise reduction) is not available yet.
• Boot splash / bootloader display driver not supported in v25.1.x on this platform family.
• Generative AI on Yocto: Available on Genio 720 as of early 2026. Genio 420 and 520 are expected to gain GAI support in 2026 Q2 (same model support, slightly lower throughput due to lower clock rates).

The ONNX Runtime NPU Execution Provider and TFLite Neuron Stable Delegate (MDLA backend) are both supported and stable on all three platforms.

No HDMI: the one thing to verify before committing

Genio 420, 520, and 720 have no HDMI output. This is documented in the MediaTek design notice for this SoC family and is not a BSP limitation — the hardware simply does not include an HDMI transmitter.

Display output is via DisplayPort over Type-C (DPoC) only. In your Yocto build, enable it with:

KERNEL_DEVICETREE_OVERLAYS += "mediatek/mt8391-evk-display-dpoc.dtbo"

For headless applications (no display required), this is irrelevant. For applications requiring HDMI output to a monitor or TV, choose Genio 510, 700, or 1200 instead. For applications requiring MIPI DSI to a panel, Genio 420/520/720 expose two DSI interfaces.

Developing on Genio 420

Because Genio 420 shares its EVK board and Yocto machine config with Genio 520 and 720, you develop on the P2V3 EVK regardless of which target SoC you plan to use in production. Build with the genio-720-evk machine:

MACHINE=genio-720-evk bitbake core-image-base

The bootloader auto-detects DRAM type (LP4X or LP5X) and capacity at runtime, so the same image boots across all three platforms without modification. Flash with genio-flash as you would for Genio 720.

For NeuroPilot SDK integration and ONNX Runtime NPU EP setup on this platform family, see the NeuroPilot SDK setup post once it publishes. For a comparison of the broader Genio family against NVIDIA Jetson for edge AI applications, see MediaTek Genio vs NVIDIA Jetson Orin.

MediaTek’s official Genio product pages are at iot.mediatek.com/genio. The MT8391/MT8371/MT8371LV datasheet is available through the MediaTek developer portal after registration.