Intel PXA27 Series Design Manual page 278

Glossary
Base Station. The telephone company's interface to the Mobile Station
BGA. Ball Grid Array
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.
bps. Transmission rate expressed in bits per second.
Bps. 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
®
Glossary-2 Intel PXA27x Processor Family Design Guide