Serial Communications Interface
UART
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Serial Interface Adaptor
(SIA) The Ethernet driver chip used on a Filtabyte Ethernet card.
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serial IO chip
UART
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serialise
<programming> To represent an arbitrarily complex data structure in a
location-independent way so that it can be communicated or stored elsewhere.
For example, an object representing a time, with attributes for year, month,
timezone, etc., could be serialised as the string "2002-02-24T14:33:52-0800", or
an XML element "<dateobj year='2002' month='02' day='24' hour='14' minute='33'
second='52' timezone='-0800' />", or as a binary string.
As well as providing an external data representation (e.g. representing an
integer as a string of ASCII digits) and marshalling components into a single
block of data, a serialisation algorithm needs to follow pointers to include
objects referred to by the initial object. This is further complicated by the
possible presence of cycles in the object graph.
It should be possible to store the serialised representation on disk, or
transmit it across a network, and then restore it as an object (graph) that is
the same as the original.
(2001-09-28)
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Adaptor « serial IO chip « serialise »
serialize » serial line » Serial Line Internet
Protocol
serialize
serialise
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Protocol » Serial Line IP
serial line
Wires which connect two serial ports carrying serial data consisting of
sequential bits represented by one of two voltages.
A common electrical specification for the signals on a serial line is RS-423.
ftp://ftp.acorn.co.uk/pub/documents/appnotes/231-245/234.ps.
(1995-02-02)
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Serial Peripheral Interface
Serial Line Internet Protocol
<communications, protocol> (SLIP) Software allowing the Internet Protocol
(IP), normally used on Ethernet, to be used over a serial line, e.g. an EIA-232
serial port connected to a modem. It is defined in RFC 1055.
SLIP modifies a standard Internet datagram by appending a special SLIP END
character to it, which allows datagrams to be distinguished as separate. SLIP
requires a port configuration of 8 data bits, no parity, and EIA or hardware
flow control. SLIP does not provide error detection, being reliant on other
high-layer protocols for this. Over a particularly error-prone dial-up link
therefore, SLIP on its own would not be satisfactory.
A SLIP connection needs to have its IP address configuration set each time
before it is established whereas Point-to-Point Protocol (PPP) can determine it
automatically once it has started.
See also SLiRP.
(1995-04-30)
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Internet Protocol » Serial Line IP » Serial
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Serial Line IP
(SLIP) Serial Line Internet Protocol.
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Protocol «
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Serial Peripheral Interface
<communications, hardware> (SPI) A serial interface in which a master
device supplies clock pulses to exchanges data serially with a slave over two
data wires (Master-Slave and Slave-Master). This term probably originated with
Motorola in about 1979 with their first all-in-one microcontroller.
(2003-07-13)
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processing
serial port
<hardware, communications> (Or "com port") A connector on a computer to
which you can attach a serial line connected to peripherals which communicate
using a serial (bit-stream) protocol. The most common type of serial port is a
25-pin D-type connector carrying EIA-232 signals. Smaller connectors (e.g. 9-pin
D-type) carrying a subset of EIA-232 are often used on personal computers. The
serial port is usually connected to an integrated circuit called a UART which
handles the conversion between serial and parallel data.
In the days before bit-mapped displays, and today on multi-user systems, the
serial port was used to connect one or more terminals (teletypewriters or VDUs),
printers, modems and other serial peripherals. Two computers connected together
via their serial ports, possibly via modems, can communicate using a protocol
such as UUCP or CU or SLIP.
(1995-01-12)
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Serial Peripheral Interface « serial port »
Serial Presence Detect » serial processing » Serial
Storage Architecture
Serial Presence Detect
presence detect
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Serial Storage Architecture » serve
serial processing
sequential processing
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Presence Detect « serial processing » Serial
Storage Architecture » serve » servelet
Serial Storage Architecture
(SSA) IBM's proposed ANSI standard for a standard high-speed interface to disk
clusters and arrays. SSA allows full-duplex packet multiplexed serial data
transfers at rates of 20Mb/sec in each direction.
According to John Taylor, programme manager at IBM's Storage Division at Havant,
SSA will be used in arrays of discs working with high-end computers ranging from
mainframes down to LAN servers. Taylor said that SSA differs from the IEEE
proposed P1394 serial interface specification in its ability to offer
simultaneous multiplexed transfers from more than one disk or array. IBM also
supports the P1394 standard which will be used primarily by desktop PCs for
multimedia applications.
SSA has received backing from a number of companies including connector makers
Molex, ITT Cannon and AMP, disk drive makers Conner and Western Digital and RAID
array suppliers like Dynatech and NCR. IBM expects to see the first SSA products
released at Comdex in Autumn 1994 but it will be 1995 before the products ship
in volume.
Under an agreement signed with ASIC maker and ARM licencee VLSI Technology, IBM
will use ARM-based chips made by VLSI to implement the SSA interface and VLSI
will make these cores available to third parties as one of its Functional System
Blocks.
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server
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