Intel Quark

Intel Quark is a line of 32-bit x86 SoCs and microcontrollers 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, and discontinued in January 2019.[1]

Intel Galileo-board with Quark-processor

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)[2] and only support embedded operating systems.

Quark powers the (now discontinued) Intel Galileo developer microcontroller board.[3] In 2016 Arduino released the Arduino 101 board that includes an Intel Quark SoC.[4][5] The CPU instruction set is the same as a Pentium (P54C/i586) CPU.[6]

History

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.[7][8]

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.[9]

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.[10] 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.

Intel announced the end-of-life of its Quark products in January 2019, with orders accepted until July 2019 and final shipments set for July 2022.[1][11]

List of processors
"Lakemont" (32 nm)
The name Lakemont has been used in reference to the processor core in multiple Quark-series processors.[12]: 4 [13]: 42 
"Clanton"
(The L2 cache column shows the size of the L1 cache.)
Model sSpec
number		 Cores Clock rate GPU
frequency		 L2
cache		 I/O bus Memory Voltage TDP Socket Release date Part
number(s)		 Release
price (USD)
Quark X1000
  • SR1BY (A0)
 1 400 MHz — 16 KB DDR3-800
2.2 W
  • FC-BGA11E
 Q4'13
  • DH8066101538300
 $9.63
Quark X1001
  • SR1VB (A0)
 1 400 MHz — 16 KB DDR3-800
2.2 W
  • FC-BGA11E
 Q2'14
  • DHQ1ET
 $11.77
Quark X1010
  • SR1BZ (A0)
 1 400 MHz — 16 KB DDR3-800
2.2 W
  • FC-BGA11E
 Q1'14
  • DH8066101555100
 $10.16
Quark X1011
  • SR1VC (A0)
 1 400 MHz — 16 KB DDR3-800
2.2 W
  • FC-BGA11E
 Q2'14
  • DHQ1ECCET
 $12.31
Quark X1020
  • SR1VW (A0)
 1 400 MHz — 16 KB DDR3-800
2.2 W
  • FC-BGA11E
 Q2'14
  • DHQ1ECCSECCTS1
 $11.45
Quark X1020D
  • SR1BX (A0)
 1 400 MHz — 16 KB DDR3-800
2.2 W
  • FC-BGA11E
 Q1'14
  • DH8066101531900
 $10.70
Quark X1021
  • SR1WH (A0)
 1 400 MHz — 16 KB DDR3-800
2.2 W
  • FC-BGA11E
 Q2'14
  • DHQ1ECCSECETS1
 $13.39
Quark X1021D
  • SR1VA (A0)
 1 400 MHz — 16 KB DDR3-800
2.2 W
  • FC-BGA11E
 Q2'14
  • DHQ1ECCSECET
 $12.85
"Silver Butte"
Model sSpec
number		 Cores Clock rate GPU
frequency		 L2
cache		 I/O bus Memory Voltage TDP Socket Release date Part
number(s)		 Release
price (USD)
Quark D1000
  • SLKMJ (B1)
 1 32 MHz — AHB-Lite, APB[14]: 30  eSRAM 1.62–3.63 V
  • 0.025 W
Q3'15
DMNIAD01SLVBT
$2.54
"Mint Valley"
Model sSpec
number		 Cores Clock rate GPU
frequency		 L2
cache		 I/O bus Memory Voltage TDP Socket Release date Part
number(s)		 Release
price (USD)
Quark D2000
  • SR2KF (A0)
 1 32 MHz — AHB-Lite,[13]: 72 APB[13]: 96  eSRAM 1.62–3.63 V
0.025 W
  • QFN40
 Q3'15
FND2000
$2.54
"Atlas Peak"
Model sSpec
number		 Cores Clock rate GPU
frequency		 L2
cache		 I/O bus Memory Voltage TDP Socket Release date Part
number(s)		 Release
price (USD)
Quark SE C1000
  • SR2T6 (A0)
  • SR2TJ (A1)
 1 32 MHz — 8 KB AHB-Lite, APB eSRAM 1.8–3.3 V
0.025 W
  • VFBGA144
 Q4'15
LMCQ1000
$10.32

Segfault bug

Intel Quark SoC X1000 contains a bug (#71538)[15] that "under specific circumstances" results in a type of crash known as a segfault. The workaround implemented by Intel is to omit LOCK prefixes (not required on single-threaded processors) in the compiled code.[16] While source-based embedded systems like those built using the Yocto Project can incorporate this workaround at compile time, general purpose Linux distributions such as Debian are deeply affected by the bug. Such a workaround is not easy to implement in binaries meant to support multithreading too as they require LOCK prefixes to function properly.[17]

See also

References
  1. "Product Change Notification 116715-00" (PDF). Intel Quality Document Management System. Intel. 2019-01-18. Retrieved 2020-09-29.
  2. Turley, Jim (October 16, 2013). "Intel Quark Provides Spin, Charm, and Strange New Low-end x86 MCU Line Emerging from the Lab". EEJournal. Archived from the original on January 8, 2014.
  3. "Intel® Galileo Datasheet". Archived from the original on 2013-10-12. Retrieved 2013-10-07.
  4. "Arduino 101". Archived from the original on 2020-09-29. Retrieved 2018-03-23.
  5. JavaFX 9 by Example, Chapter on Arduino
  6. "Intel Quark SoC X1000 Core - Developer's Manual". Archived from the original on 2014-10-19. Retrieved 2014-10-19.
  7. Flaherty, Nick (2013-10-07). "Intel Tackles SoC With Quark". EETimes. Archived from the original on 29 February 2016. Retrieved 9 October 2013.
  8. Intel® Quark SoC X1000 (16K Cache, 400 MHz) Specifications, Intel
  9. Gareth Halfacree (7 January 2014). "Intel unveils Quark-based Edison microcomputer". BitTech. Retrieved 2014-01-07.
  10. "Intel® Curie Module: Unleashing Wearable Device Innovation". Intel. 2015-01-06. Retrieved 12 April 2015.
  11. Shilov, Anton (2019-01-22). "Intel Discontinues Quark SoCs and Microcontrollers". AnandTech. Retrieved 2020-09-29.
  12. Intel Quark SoC X1000 Debug Operations. Intel Corporation. 2014.
  13. Intel Quark microcontroller D2000. Intel Corporation. 2015.
  14. Intel Quark Microcontroller D1000 Datasheet. Intel Corporation. 2015.
  15. "Intel Quark SoC X1000 Software - Release Notes" (PDF). Revision 002. 22 May 2014. p. 21.
  16. "debian-glibc@lists.debian.org: Bug#738575: pthread: segfault in libpthread on Intel Galileo board".
  17. "#738575 - pthread: Segfault in libpthread on Intel Galileo board - Debian Bug report logs".
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