Super I/O is a class of I/O controller integrated circuits that began to be used on personal computermotherboards in the late 1980s, originally as add-in cards, later embedded on the motherboards. A super I/O chip combines interfaces for a variety of low-bandwidth devices. Now it is mostly merged with EC.
Diagram of a motherboard, which supports many on-board peripheral functions as well as several expansion slots.ITE Super I/O chip (IT8712F)SMSC™ (now Microchip) Super I/O chip (FDC37M813) on IBM motherboard
The functions below are usually provided by the super I/O if they are on the motherboard:
A game port (not provided by recent super I/O chips anymore because Windows XP is the last Windows OS to natively support game ports, requiring vendors to supply their own drivers for later Windows operating systems)
By combining many functions in a single chip, the number of parts needed on a motherboard is reduced, thus reducing the cost of production.
The original super I/O chips communicated with the central processing unit via the ISA bus. With the evolution away from ISA towards use of the PCI bus, the Super I/O chip was often the biggest remaining reason for continuing inclusion of ISA on the motherboard.
Later super I/O chips use the LPC bus instead of ISA for communication with the central processing unit. This normally occurs through an LPC interface on the southbridge chip of the motherboard.
Since Intel is replacing the LPC bus with the eSPI bus, super I/O chips that connect to that bus have appeared on the market.
Companies that make super I/O controllers include Nuvoton (spun off from Winbond),[1] ITE Inc. [zh],[1][3] Fintek Inc. ,[5]ENE Tech. (for laptop) and Microchip Technology (which bought SMSC™). National Semiconductor used to make super I/O controllers but sold that business to Winbond at 2005, which already had a competing super I/O controller business. In 2008, Winbond then spun off its logic businesses to a wholly owned subsidiary, Nuvoton. SMSC made super I/O chips and then got acquired by Microchip Technology.
^ abcde. Archived from the original on 2008-05-18.
^Constantine A. Murenin (2007-04-17). Generalised Interfacing with Microprocessor System Hardware Monitors. Proceedings of 2007 IEEE International Conference on Networking, Sensing and Control, 15–17 April 2007. London, United Kingdom: IEEE. doi:10.1109/ICNSC.2007.372901. ISBN978-1-4244-1076-7. IEEE ICNSC 2007, pp. 901—906.
^ abJulien Bordet (2003). "it — ITE IT8705F/12F/16F and SiS SiS950 Super I/O Hardware Monitor". BSD Cross Reference. DragonFly BSD. Retrieved 2019-03-07.
"it -- ITE IT8705F/12F/16F and SiS SiS950 Super I/O Hardware Monitor". DragonFly On-Line Manual Pages.
^Constantine A. Murenin (2010-05-21). OpenBSD Hardware Sensors — Environmental Monitoring and Fan Control (MMath thesis). University of Waterloo: UWSpace. hdl:10012/5234. Document ID: ab71498b6b1a60ff817b29d56997a418.
^Alexander Yurchenko (2005). "fins — Fintek F71805F LPC Super I/O". BSD Cross Reference. OpenBSD. Retrieved 2019-03-07.
Superiotool is a Linux user-space tool to detect which Super I/O is used on a mainboard, and it can provide detailed information about its register contents.
May 05, 2024
super, class, controller, integrated, circuits, that, began, used, personal, computer, motherboards, late, 1980s, originally, cards, later, embedded, motherboards, super, chip, combines, interfaces, variety, bandwidth, devices, mostly, merged, with, diagram, m. Super I O is a class of I O controller integrated circuits that began to be used on personal computer motherboards in the late 1980s originally as add in cards later embedded on the motherboards A super I O chip combines interfaces for a variety of low bandwidth devices Now it is mostly merged with EC Diagram of a motherboard which supports many on board peripheral functions as well as several expansion slots ITE Super I O chip IT8712F SMSC now Microchip Super I O chip FDC37M813 on IBM motherboard The functions below are usually provided by the super I O if they are on the motherboard A floppy disk controller 1 An IEEE 1284 compatible parallel port 1 commonly used for printers One or more 16C550 compatible serial port UARTs 1 Keyboard controller for PS 2 keyboard and or mouse Most Super I O chips include some additional low speed devices such as Temperature voltage and fan speed interface 2 3 Thermal Zone Chassis intrusion detection Mainboard power management LED management PWM fan speed control 4 An IrDA Port controller A game port not provided by recent super I O chips anymore because Windows XP is the last Windows OS to natively support game ports requiring vendors to supply their own drivers for later Windows operating systems A watchdog timer A consumer IR receiver A MIDI port Some GPIO pins Legacy Plug and Play or ACPI support for the included devices By combining many functions in a single chip the number of parts needed on a motherboard is reduced thus reducing the cost of production The original super I O chips communicated with the central processing unit via the ISA bus With the evolution away from ISA towards use of the PCI bus the Super I O chip was often the biggest remaining reason for continuing inclusion of ISA on the motherboard Later super I O chips use the LPC bus instead of ISA for communication with the central processing unit This normally occurs through an LPC interface on the southbridge chip of the motherboard Since Intel is replacing the LPC bus with the eSPI bus super I O chips that connect to that bus have appeared on the market Companies that make super I O controllers include Nuvoton spun off from Winbond 1 ITE Inc zh 1 3 Fintek Inc 5 ENE Tech for laptop and Microchip Technology which bought SMSC National Semiconductor used to make super I O controllers but sold that business to Winbond at 2005 which already had a competing super I O controller business In 2008 Winbond then spun off its logic businesses to a wholly owned subsidiary Nuvoton SMSC made super I O chips and then got acquired by Microchip Technology Contents 1 Common models and brief 1 1 ENE Tech 1 2 ITE Inc 1 3 Microchip Technology SMSC 1 4 Nuvoton Technology Winbond 2 See also 3 References 4 External linksCommon models and brief editENE Tech edit Many models are used for laptops with built in keyboard controllers KB3930 KB930QF ITE Inc edit T8510E series Microchip Technology SMSC edit Microchip Technology provides Super I O components with their SCH MEC and LPC47 series Here are some examples SCH3112 SCH3114 SCH3116 SCH3223 Nuvoton Technology Winbond edit NCT6776See also editenvsys hw sensors lm sensors contains a tool named sensors detect that can also detect which Super I O is used on a mainboard SpeedFan Embedded controller EC References edit a b c d e Super I O Chip Examples Archived from the original on 2008 05 18 Constantine A Murenin 2007 04 17 Generalised Interfacing with Microprocessor System Hardware Monitors Proceedings of 2007 IEEE International Conference on Networking Sensing and Control 15 17 April 2007 London United Kingdom IEEE doi 10 1109 ICNSC 2007 372901 ISBN 978 1 4244 1076 7 IEEE ICNSC 2007 pp 901 906 a b Julien Bordet 2003 it ITE IT8705F 12F 16F and SiS SiS950 Super I O Hardware Monitor BSD Cross Reference DragonFly BSD Retrieved 2019 03 07 it ITE IT8705F 12F 16F and SiS SiS950 Super I O Hardware Monitor DragonFly On Line Manual Pages Constantine A Murenin 2010 05 21 OpenBSD Hardware Sensors Environmental Monitoring and Fan Control MMath thesis University of Waterloo UWSpace hdl 10012 5234 Document ID ab71498b6b1a60ff817b29d56997a418 Alexander Yurchenko 2005 fins Fintek F71805F LPC Super I O BSD Cross Reference OpenBSD Retrieved 2019 03 07 fins Fintek F71805F LPC Super I O OpenBSD manual page server External links editSuperiotool is a Linux user space tool to detect which Super I O is used on a mainboard and it can provide detailed information about its register contents Retrieved from https en wikipedia org w index php title Super I O amp oldid 1184301872, wikipedia, wiki, book, books, library,
