PXA270 datasheet(112/126 Pages) INTEL

112 / 126 page

Glossary-2

Electrical, Mechanical, and Thermal Specification

Intel® PXA270 Processor

Glossary

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.

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

PXA270 Datasheet(PDF) 112 Page - Intel Corporation