PXA270 datasheet(111/126 Pages) INTEL

111 / 126 page

Electrical, Mechanical, and Thermal Specification

Glossary-1

Glossary

3G: An industry term used to describe the next, still-to-come generation of wireless applications. It represents a

move from circuit-switched communications (where a device user has to dial in to a network) to broadband,

high-speed, packet-based wireless networks (which are always on). The first generation of wireless

communications relied on analog technology, followed by digital wireless communications. The third generation

expands the digital capabilities by including high-speed connections and increased reliability.

802.11: Wireless specifications developed by the IEEE, outlining the means to manage packet traffic over a

network and ensure that packets do not collide, which could result in the loss of data, when travelling from device

to device.

8PSK: 8 phase shift key modulation scheme. Used in the EDGE standard.

AC ’97 AC-link standard serial interface for modem and audio

ACK: Handshake packet indicating a positive acknowledgment.

Active device: A device that is powered and is not in the suspended state.

Air interface: the RF interface between a mobile cellular handset and the base station

AMPS: Advanced Mobile Phone Service. A term used for analog technologies, the first generation of wireless

technologies.

Analog: Radio signals that are converted into a format that allows them to carry data. Cellular phones and other

wireless devices use analog in geographic areas with insufficient digital networks.

ARM* V5te: An ARM* architecture designation indicating the processor is conforms to ARM* architecture

version 5, including “Thumb” mode and the “El Segundo” DSP extensions.

Asynchronous Data: Data transferred at irregular intervals with relaxed latency requirements.

Asynchronous RA: The incoming data rate, Fs i, and the outgoing data rate, Fs o, of the RA process are

independent (i.e., there is no shared master clock). See also rate adaptation.

Asynchronous SRC: The incoming sample rate, Fsi, and outgoing sample rate, Fso, of the SRC process are

independent (i.e., there is no shared master clock). See also sample rate conversion.

Audio device: A device that sources or sinks sampled analog data.

AWG#: The measurement of a wire’s cross-section, as defined by the American Wire Gauge standard.

Babble: Unexpected bus activity that persists beyond a specified point in a (micro)frame.

Backlight Inverter: A device to drive cold cathode fluorescent lamps used to illuminate LCD panels.

Bandwidth: The amount of data transmitted per unit of time, typically bits per second (b/s) or bytes per second

(B/s). The size of a network “pipe” or channel for communications in wired networks. In wireless, it refers to the

range of available frequencies that carry a signal.

Base Station:The telephone company’s interface to the Mobile Station

PXA270 Datasheet(PDF) 111 Page - Intel Corporation