Intel Quark

Intel Galileo-Board with Quark-Processor

Intel Quark is a line of 32-bit x86 SoCs and μCs by Intel, designed for small size and low power consumption, and targeted at new markets including wearable devices. The line was introduced at Intel Developer Forum in 2013. Quark processors, while slower than Atom processors, are much smaller and consume less power. They lack support for SIMD instruction sets (such as MMX and SSE)^[1] and only support embedded operating systems. Quark powers the Intel Galileo developer microcontroller board.^[2] The CPU instruction set is the same as a Pentium (P54C/i586) CPU.^[3]

The first product in the Quark line is the single-core 32 nm X1000 SoC with a clock rate of up to 400 MHz. The system includes several interfaces, including PCI Express, serial UART, I²C, Fast Ethernet, USB 2.0, SDIO, power management controller, and GPIO. There are 16 KB of on-chip embedded SRAM and an integrated DDR3 memory controller.^[4][5]

A second Intel product that includes Quark core, the Intel Edison microcomputer, was presented in January 2014. It has a form factor close to the size of an SD card, and is capable of wireless networking using Wi-Fi or Bluetooth.^[6]

In January 2015, Intel announced the sub-miniature Intel Curie module for wearable applications, based on a Quark SE core with 80 KB SRAM and 384 KB flash.^[7] At the size of a button, it also features a 6-axis accelerometer, a DSP sensor hub, a Bluetooth LE unit and a battery charge controller.

In October 2015, Intel's Senior Vice President Josh Walden and Arduino LLC's Massimo Banzi announced the successor to the "Arduino Uno" would be the "Arduino 101" and that it would be based on Intel's Curie module which itself was centered on a Quark processor.

List of Intel Quark processors

"Lakemont" (32 nm)

The name Lakemont has been used in reference to the processor core in multiple Quark-series processors.^[8]:4[9]:42

"Clanton"

(The L2 cache column shows the size of the L1 cache)

"Silver Butte"

"Mint Valley"

"Atlas Peak"

Segfault bug

Intel Quark SoC X1000 contains a bug #71538^[11] that "under specific circumstances" results in crash, known in the industry as a segfault. The workaround implemented by Intel is to omit LOCK instructions in the compiled code.^[12] While Yocto Linux based embedded systems incorporate this workaround, general purpose Linux distributions such as Debian are deeply affected by the bug. Such a workaround is not easy to implement on multithreading systems as they require LOCK instruction to function properly.^[13]

References

External links

• Intel Quark SoC Documents
• Quark family // Intel ARK (Product Specs)
• Intel's 'Quark' lineup targets wearables. Intel is making the tiniest of chips that can power wearable devices. // CNET, September 10, 2013
• Intel Unveils Tiny Quark Chips for Wearable Devices. Processor Is One-Fifth the Size of Its Low-End Atom Chip // The WSJ, September 10, 2013
• Intel introduces Quark, a tiny chip for the internet of things and wearable computing // The Verge, 2013-09-10
• With Quark, Intel blesses the market of chips for wearable devices // Ventureboat, 2013-09-12

Single-board computer & Single-board microcontroller
Devices	Arduino Arndale Board Banana Pi BeagleBoard Cotton Candy CHIP Cubieboard Dragonboard Edison Galileo Gumstix Hawkboard IGEPv2 Jetson TK1 Jetson TX1 ODROID OLinuXino PandaBoard Parallella Rascal Raspberry Pi Snowball Tiva-C LaunchPad UDOO
SoCs	ARM Allwinner Ax Exynos i.MX K3V3 MT Nomadik NovaThor OMAP Rockchip Qualcomm Snapdragon Tegra WonderMedia MIPS Jz x86/x86-64 Atom Jaguar-based Puma-based Quark
Software	Apache Hadoop Linaro
Comparison of single-board computers