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The Serial ATA specification is designed to overcome speed limitations while enabling the storage interface to scale with the
growing media rate demands of PC platforms. Serial ATA is to replace parallel
systems and drivers, adding performance headroom for years to come. It is developed with data transfer rate of 150 Mbytes/second,
and 300M/bs, 600M/bs to come. It reduces voltage and pins count requirements and can be implemented with thin and easy to
route cables.
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SMBus is also called I
C bus. It is a two-wire bus developed for component communication (especially for semiconductor IC). For
example, set clock of clock generator for jumper-less motherboard. The data transfer rate of SMBus is only 100Kbit/s, it allows one
host to communicate with CPU and many masters and slaves to send/receive message.
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SPD is a small ROM or
EEPROM
timing and chip parameters. SPD can be used by
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A Universal Serial Bus (USB) is an external bus (an interconnect) standard that supports data transfer rates of 12 Mbps. A single
USB port can be used to connect up to 127 peripheral devices, such as mouse, modems and keyboards. Introduced in 1996, USB
has completed replaced serial and parallel ports. It also supports plug-and-play installations and hot plugging Plug-and-play is the
ability to add and remove devices to a computer while the computer is running and have the operating system automatically
recognize the change. USB 2.0, which supports data transfer rates of 480 Mbps, has been widely used in motherboard these days.
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device resided on the DIMM or RIMM. SPD stores memory module information such as DRAM
BIOS
to decide best timing for this DIMM or RIMM.
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ATA
with the compatibility with existing operating
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