Ohjainkortti

ohjainkortti, in Finnish computing, is a hardware expansion card or embedded module that provides a dedicated controller function for peripheral devices or subsystems. It connects to a host computer or device through a bus such as PCI Express, PCI, USB, or other interfaces and contains processing logic (microcontroller, FPGA, or ASIC) plus firmware and memory. The card acts as an interface and controller, offloading management of the connected devices and enabling features beyond the host motherboard’s built-in capabilities. Typical roles include storage control (SATA/SAS RAID controllers), network interfaces (Ethernet controllers), USB host controllers, SCSI controllers, or expansion I/O controllers in embedded systems.

Common characteristics include ports and connectors for the targeted devices, firmware-based operation, and device drivers in an operating system. Some cards implement onboard cache, BIOS or UEFI options, and support for hot-swapping in server environments. In embedded applications, ohjainkortti may be part of a larger system-on-module and handled via firmware rather than a full operating system driver.

Installation and compatibility depend on the card’s bus and form factor. Ohjainkortti is typically installed in a motherboard expansion slot (such as PCIe or PCI) or integrated into an industrial controller. Driver support varies by operating system and card chipset; modern cards usually provide drivers for Windows, Linux, and other major platforms. When selecting a card, considerations include bus type and speed, number and type of ports, supported protocols, driver availability, and firmware requirements.

See also: PCIe, SATA controller, RAID controller, NIC, SCSI controller, USB controller, expansion card.