Calixto AM62L STAMP SOM Puts Linux on a Postage Stamp

The Calixto AM62L STAMP SOM Packs a Full Linux Computer Into 40x40 mm

The Calixto AM62L STAMP SOM is one of the most charming pieces of embedded hardware I have seen this month: a complete, bootable Linux computer squeezed onto a 40 x 40 mm board barely larger than a postage stamp. Unveiled by India's Calixto Systems on July 6, 2026, and reported by CNX Software, this tiny system-on-module is built around Texas Instruments' AM62L Sitara processor and is aimed squarely at industrial automation, human-machine interfaces (HMIs), EV chargers, and smart retail. An evaluation kit is already available, which means developers can start building today.

Key Takeaways

• 40 x 40 mm form factor — a full embedded-Linux computer on a postage-stamp-sized module.
• Dual Arm Cortex-A53 at up to 1.25 GHz via the TI AM62L Sitara SoC.
• Up to 2 GB LPDDR4x memory plus 8 or 16 GB of onboard eMMC storage.
• Rich I/O and hardware security — Gigabit Ethernet, CAN FD, USB 2.0 OTG, MIPI DSI, plus AES/RSA/ECC acceleration and a true random number generator.

What Is a System-on-Module, and Why Use One?

If you are new to the term, a system-on-module (SOM) is a small board that carries the "hard parts" of a computer — the processor, RAM, storage, and power management — all pre-integrated and validated. Instead of designing a complex multi-layer board around a bare processor, a product team drops the SOM onto a simpler custom carrier board that holds only the connectors and peripherals their product needs.

That division of labor is exactly why the Calixto AM62L module is so appealing. The tricky high-speed routing for the LPDDR4x memory and the Cortex-A53 cores is already handled, so a developer can focus on their actual product. It is the same philosophy that makes boards like the Titan Mini edge-AI board so productive for makers, applied here to industrial-grade Linux.

Inside the TI AM62L Sitara Processor

At the heart of the module sits the TI AM62L, featuring dual Arm Cortex-A53 cores clocked up to 1.25 GHz. The Cortex-A53 is a proven, power-efficient 64-bit design, and a dual-core configuration is a sweet spot for embedded Linux: enough headroom to run a responsive touchscreen HMI, handle networking, and manage real-time control loops without drawing much power.

Calixto pairs the SoC with up to 2 GB of LPDDR4x and a choice of 8 GB or 16 GB eMMC storage. That is a generous amount of fast memory and flash for this class of device, comfortably enough for a modern Linux distribution, a graphical interface, and application logic.

How Much I/O Fits on a Postage Stamp?

This is where the Calixto AM62L STAMP SOM really shows its ambition. Despite the tiny footprint, it exposes a remarkably complete set of interfaces:

• Gigabit Ethernet for fast, reliable wired networking.
• 2x USB 2.0 OTG ports for peripherals or device mode.
• MIPI DSI and parallel RGB display outputs for driving HMIs and touch panels.
• CAN FD for industrial and automotive-style bus communication.
• 8x UART, 4x SPI, 5x I2C, plus ADC, DAC, and PWM for sensors and actuators.

That CAN FD interface is a standout for EV chargers and factory equipment, where robust, deterministic communication matters. For makers used to lighter-weight connectivity like ESP32-C5 dual-band devkits, the sheer breadth of industrial buses here is a real step up.

Built-In Hardware Security

Modern connected devices need security baked in, not bolted on, and this module delivers. The AM62L platform includes hardware AES and RSA/ECC cryptographic acceleration, a true random number generator (TRNG) and DRBG, and a unique device ID. Together these support secure boot, encrypted communication, and strong device identity — exactly the building blocks an EV-charging or smart-retail product needs to earn trust in the field.

Why This Matters for Developers

What excites me most is the accessibility angle. By packaging a validated, secure, well-connected Linux computer into a 40 x 40 mm module with an available eval kit, Calixto Systems lowers the barrier for teams building industrial and EV-charging products. Instead of months spent on high-speed board design, developers get a ready-made compute core and can iterate on the parts that make their product unique.

Compact, affordable, and richly featured, the Calixto AM62L STAMP SOM is a great example of how far embedded computing has come. For more hardware like this, browse our mini computer coverage.

Sources: CNX Software — July 6, 2026; Calixto Systems — July 2026; T3 Gemstone Community — July 2026.