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The System Management Bus (SMBus or SMB) is a single-ended simple two-wire bus for the purpose of lightweight communication. Most commonly it is found in chipsets of computer motherboards for communication with the power source for ON/OFF instructions.
Version 1 of the Desktop Management BIOS (DMIBIOS) specification was produced by Phoenix Technologies in or before 1996. [5] [6]Version 2.0 of the Desktop Management BIOS specification was released on March 6, 1996 by American Megatrends (AMI), Award Software, Dell, Intel, Phoenix Technologies, and SystemSoft Corporation.
The Power Management Bus (PMBus) is a variant of the System Management Bus (SMBus) which is targeted at digital management of power supplies. Like SMBus, it is a relatively slow speed two wire communications protocol based on I²C. Unlike either of those standards, it defines a substantial number of domain-specific commands rather than just ...
The HECI bus allows the host operating system (OS) to communicate directly with the Management 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 LPC bridge provides a data and control path to the super I/O (the normal attachment for the PS/2 keyboard and mouse, parallel port, serial port, IR port, and floppy controller). SMBus controller. DMA controller. The 8237 DMA controller allows ISA or LPC devices direct access to main memory without needing help from the CPU. PIC and I/O APIC.
Bus controller Thunderbolt controller chips. Copper, 2 or 4 channels, 10 Gbit/s. Reference unknown. 2011 Caldwell RAID controller Intel SRCZCR RAID controller. Dual-channel SCSI Ultra-160 or Ultra-320, PCI 2.2. Uses the Intel 80303 I/O processor. Reference unknown. 2002 Calexico: Wi-Fi Intel PRO/Wireless 2100B, an 802.11b mini-PCI Wi-Fi adapter.
In computer architecture, a control bus is part of the system bus and is used by CPUs for communicating with other devices within the computer. While the address bus carries the information about the device with which the CPU is communicating and the data bus carries the actual data being processed, the control bus carries commands from the CPU and returns status signals from the devices.
The memory bus is the bus that connects the main memory to the memory controller in computer systems. Originally, general-purpose buses like VMEbus and the S-100 bus were used, but to reduce latency, modern memory buses are designed to connect directly to DRAM chips, and thus are defined by chip standards bodies such as JEDEC.
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