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BFSK binary frequency shift keying. A coding scheme for digital data.
Bit A unit of information used by digital computers. Represents the smallest piece of addressable memory within a
computer. A bit expresses the choice between two possibilities and is typically represented by a logical one (1) or
zero (0).
Bit Stuffing Insertion of a "0" bit into a data stream to cause an electrical transition on the data wires, allowing a
PLL to remain locked.
Blackberry A two-way wireless device (pager) made by Research In Motion (RIM) that allows users to check
e-mail and voice mail translated into text, as well as page other users of a wireless network service. It has a
miniature "qwerty" keyboard that can be used by your thumbs, and uses SMS protocol. A Blackberry user must
subscribe to the proprietary wireless service that allows for data transmission.
Bluetooth A short-range wireless specification that allows for radio connections between devices within a 30-foot
range of each other. The name comes from 10th-century Danish King Harald Blatand (Bluetooth), who unified
Denmark and Norway.
BPSK binary phase shift keying. A means of encoding digital data into a signal using phase-modulated
communications.
b/s Transmission rate expressed in bits per second.
B/s Transmission rate expressed in bytes per second.
BTB Branch Target Buffer
BTS Base Transmitter Station
Buffer Storage used to compensate for a difference in data rates or time of occurrence of events, when transmitting
data from one device to another.
Bulk Transfer One of the four USB transfer types. Bulk transfers are non-periodic, large bursty communication
typically used for a transfer that can use any available bandwidth and can also be delayed until bandwidth is
available. See also transfer type.
Bus Enumeration Detecting and identifying USB devices.
Byte A data element that is eight bits in size.
Capabilities Those attributes of a USB device that are administrated by the host.
CAS Cycle Accurate Simulator
CAS-B4-RAS See CBR.
CBR CAS Before RAS. Column Address Strobe Before Row Address Strobe. A fast refresh technique in which the
DRAM keeps track of the next row it needs to refresh, thus simplifying what a system would have to do to refresh
the part.
CDMA Code Division Multiple Access U.S. wireless carriers Sprint PCD and Verizon use CDMA to allocate
bandwidth for users of digital wireless devices. CDMA distinguishes between multiple transmissions carried
simultaneously on a single wireless signal. It carries the transmissions on that signal, freeing network room for the
wireless carrier and providing interference-free calls for the user. Several versions of the standard are still under
development. CDMA should increase network capacity for wireless carriers and improve the quality of wireless
messaging. CDMA is an alternative to GSM.
Glossary-2
Intel® PXA27x Processor Family Optimization Guide
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