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Mini-ITX and Pico-ITX SBCs (2020)

Written by Jeff Child

Performance Platforms

Based on the small-sized versions of the ITX motherboard form factor, Mini-ITX and Pico-ITX keep growing in popularity and in embedded market share. These SBCs provide system developers with complete PC-functionality and advanced graphics.

There was a time when large slot-card based form factors were the only choices for embedded systems. Those days are gone, now that a complete computing solution can be designed into a small form factor embedded motherboard. Among these so-called bus-less embedded form factors are the various versions of the ITX. They offer a more complete SBC approach, integrating most or all of the typical desktop PC kinds of functions. Applications where graphics are a priority are particularly suited to these types of board-level products.

While the ITX form factor is based on the ATX PC motherboard standard, what’s more popular in recent years are its spinoffs Mini-ITX and Pico-ITX. Mini-ITX is a 170 mm × 170 mm (or 6.7″ x 6.7″) low-power motherboard form factor developed by VIA Technologies in 2001. They are commonly used in small form factor computer systems. A more recent variant is the Thin Mini ITX, a version of Mini-ITX that is only 22mm in height, with a thinner port cluster and horizontally stacked SO-DIMM memory slots. Meanwhile, Pico ITX is a PC motherboard form factor released by VIA Technologies in January 2007. The form factor was transferred over to SFF-SIG in 2008. The Pico-ITX form factor specifications call for the board to be 100mm × 72mm (3.9″ × 2.8”), 75% smaller than the Mini-ITX form factor.

Pico-ITX technology was embraced by at least one of the teams in Audi’s 2017 annual Audi Autonomous Driving Cup (AADC), a competition for engineering students Participants develop fully automatic driving capabilities and the necessary software architectures. These are then put to the test in 1/8th-scale model cars. Specifically built for the competition by Audi, these serve as hardware platforms (Figure 1). The team named “FASzination – Autonom” from Hochschule Kempten, which was supported by Kontron, built their model car with 10 ultrasound sensors and 2D/3D cameras (RGB and deep image). A wheel speed sensor and six axis motion sensors for angular velocity and acceleration submit their data to the model car’s control unit. For that control unit, the team chose Kontron’s Pico-ITX pITX-E3845 SBC with 4-core 1.9 GHz Atom, 8GB RAM and 60GB SSD. 

FIGURE 1
Pico-ITX technology was embraced by at least one of the teams in Audi’s 2017 annual Audi Autonomous Driving Cup (AADC). Participants develop fully automatic driving capabilities and the necessary software architectures. These are then put to the test in 1/8th-scale model cars. (Source: Audi).

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Former Editor-in-Chief at Circuit Cellar | Website | + posts

Jeff served as Editor-in-Chief for both LinuxGizmos.com and its sister publication, Circuit Cellar magazine 6/2017—3/2022. In nearly three decades of covering the embedded electronics and computing industry, Jeff has also held senior editorial positions at EE Times, Computer Design, Electronic Design, Embedded Systems Development, and COTS Journal. His knowledge spans a broad range of electronics and computing topics, including CPUs, MCUs, memory, storage, graphics, power supplies, software development, and real-time OSes.

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Mini-ITX and Pico-ITX SBCs (2020)

by Circuit Cellar Staff time to read: 2 min