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Host Embedded Controller Interface : ウィキペディア英語版 | Host Embedded Controller Interface
Host Embedded Controller Interface, abbreviated as HECI, is a recent (introduced in 2006) technology used for Active Management Technology (AMT) in Intel chipsets that support Core 2 Duo microprocessors. == Details == The HECI bus allows the host operating system (OS) to communicate directly with the Manageability Engine (ME) integrated in the chipset. This bi-directional, variable data-rate bus enables the host and ME to communicate system management information and events in a standards-compliant way, essentially replacing the System Management Bus (SMBus). The bus consists of four wires: a request and grant pair along with a serial transmit and receive data pair. Original equipment manufacturers (OEMs) have historically provided active management technologies through the use of proprietary on-board controllers, such as Baseboard Management Controllers. These solutions typically suffer two main disadvantages due to their proprietary nature. High BOM costs are usually incurred due to the need for additional components and routing. High product lifecycle costs are incurred due to the non-standard implementation, which increases software and hardware design and validation costs while remaining relatively inflexible to future changes. On the other hand, the inflexibility is even greater with HECI due to coupling HECI with a chipset, and having to redevelop HECI software for each different chipset as opposed to one common BMC software for multiple chipsets. HECI and the previously used SMBus have the following aspects in common: the Host OS is able to control system management devices such as: on-board fan controllers, remote wake devices such as Wake-on-LAN, power supply devices such as Smart Battery Data. Builtin HECI functionality and third-party management cards can allow the Host OS to directly initiate management events (such as remote wake, or, out-of-band throttling to decrease thermal and power profile) in case HECI is supported by the running OS. Example devices are network cards and graphics cards. Besides that, both HECI and other ME technologies are chipset/ME vendor-specific.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Host Embedded Controller Interface」の詳細全文を読む
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